Water-soluble quenching medium (4)

061 Union Carbon UCON Quenehants E

【Introduction】 UCON Quenehants E, a water-soluble quenching liquid, is a non-combustible polymer quenching liquid. Produced by Union Carbide, USA, consisting of a liquid organic polymer and a corrosion inhibitor. The organic polymer is completely soluble in water to form a clear, homogeneous solution.

[Typical physical and chemical properties] The typical physical and chemical parameters are shown in Table 2-12.

【The main purpose】

1 Suitable for heat treatment of steel, induction heating formed parts or alloys.

2 Large alloy parts for machining in trolley and pit furnaces.

3 For processing parts (intermittent and continuous operation) requiring oil quenching in a furnace using methane and carbonitriding.

4 Parts that are directly quenched after forging.

062 BOTE Polymer Quenchants A

[Introduction] Korea BOTE heat treatment quenching liquid is a non-combustible polymer quenching agent. It consists of a liquid organic polymer and a corrosion inhibitor. The water-soluble solution organic polymer is completely soluble in water to form a clear, homogeneous

Solution.

[Typical physical and chemical properties] The typical physical and chemical parameters are shown in Table 2-13.

【The main purpose】

1 continuous mesh belt furnace, multi-purpose box furnace, pit furnace, trolley furnace, high frequency or medium frequency heat treatment.

2 carburizing, carbonitriding, quenching and tempering of the endothermic or exothermic furnace (intermittent and continuous operation).

3 aluminum alloy forging, casting, solid solution, aging treatment.

4 Suitable for heat treatment of steel materials.

063 Korea BOTE Polymer Quenchants E

[Introduction] Korea BOTE water-based polymer quenching agent, composed of organic polymer and corrosion inhibitor, is a non-combustible quenching agent. The medium is completely water-free, forming a clear, homogeneous solution suitable for heat treatment of steel.

[Typical physical and chemical properties] The typical physical and chemical parameters are shown in Table 2-14.

【The main purpose】

1 Large alloy parts for machining in trolley and pit furnaces.

2 For the processing of workpieces (intermittent and continuous operation) requiring oil quenching in a furnace using methane and carbonitriding.

3 Using forged waste heat, the workpiece is directly quenched.

4 Induction or heating of a workpiece or alloy into a crucible.

064 polyvinylpyrrolidone (PVP) aqueous solution

[Introduction] The medium has strong anti-quenching ability, can be used at a lower concentration, and has certain defoaming and anti-rust properties. In the course of use, the molecular chain is easily broken, the molecular weight is lowered, and the quenching quality is affected, so it is not widely used.

Quenching agent composition: Polyvinylpyrrolidone (PVP) is polymerized from N-vinyl and pyrrolidone, with a molecular weight of 50,000 to 360,000 (preferably 100,000 to 200,000). It is divided into 4 grades according to the molecular weight, usually Add (quality fraction) <15% rust inhibitor (sodium nitrite, borax, etc.), and <3% preservative.

[Main use] can be used for overall direct quenching, forging residual heat quenching and induction quenching

The quality cost is lower than oil and also has good corrosion resistance.

Recommended concentration of quenching agent (mass fraction): S53C 8% to 10%, SiMn2B 15% to 20%, SCM3H 20% to 25%.

[Main use] It can be used for cooling of steels such as S53C, SiMn2B and SCM3H.

067 Polyoxyethylene and propylene integrated ethylene glycol solution

[Introduction] When the workpiece is cooled in the medium, the vapor film stage is longer than the oil, and the cooling rate below the Ms point is larger than that of the oil. As the concentration of the medium increases, the amount of quenching deformation is not too high, and there is a problem of spoilage when impurities are mixed in the quenching liquid.

For high carbon steels, there is a risk of quenching unevenness even if the medium is stirred vigorously.

Quenching agent recommended medium concentration (mass fraction): S53C 15%, SiMn2B 15% ~ 20%, SCM3H 20%.

[Main use] It can be used for quenching and cooling of S53C, SiMn2B, SCM3H, etc.

068 polyethylene oxide aqueous solution

[Introduction] The vapor film phase of the medium is longer than the oil, but the cooling rate below the Ms point is faster than the oil. When the concentration (mass fraction) is 10%, the cooling rate in the low temperature region is close to that of the oil. For the high-carbon steel strong stirring, there are also disadvantages such as quenching unevenness. As the concentration of the medium increases, the quenching deformation of the same steel does not change much. Even if impurities are mixed in the medium, the corrosion resistance is good.

Recommended medium concentration (mass fraction) of quenching agent: S53C 8%~10%, SiMn2B10%~15%, SCM3H 15%.

[Main use] It can be used for quenching cooling of S53C, SiMn2B, SCM3H, etc.

069 polyvinyl amide derivative aqueous solution

[Introduction] In the cooling process of the aqueous solution of polyvinyl amide derivative below the Ms point, the cooling rate is slowed down due to the adsorption of the surface of the workpiece and the medium, which is beneficial to prevent quenching deformation and cracking. However, the reduction of the viscosity of the solution due to thermal decomposition causes the cooling performance of the low temperature region to deteriorate, which in turn causes the quenching crack.

This change in media concentration has a large effect on the quenching and cooling characteristics.

Quenching composition: To obtain hardenability comparable to oil quenching, the following concentrations (mass fraction) can be used: S45C 10% to 20%, S55C 15% to 20%, and SCM3 30%.

[Main use] It can be used for quenching and cooling of S45C, S55C, SCM3, etc.

070 THIF-501 waterborne quenching agent

[Introduction] Yantai Hengxin Chemical Technology Co., Ltd. THIF-501 water-based quenching condensate, is a light yellow translucent concentrate, which overcomes the rapid cooling of water, easy to crack the workpiece, slow cooling of oil, poor quenching effect and flammable Other disadvantages, according to the quenching process requirements of the workpiece before use, a certain proportion of water dilution, and the price is low, the use range is very wide.

By adjusting the concentration of the aqueous solution, the ridge ability can be adjusted over a wide range, and it can be obtained close to water, or between water and oil, and equivalent to oil or slower cooling rate to meet different materials and workpieces. Quenching requirements.

The water quenching agent is non-toxic, smokeless, non-corrosive, non-combustible, safe to use, and free from environmental pollution. Replacing the oil quenching with an aqueous quenching agent can significantly reduce the production cost; and the workpiece is clean and hygienic, and has a certain anti-rust ability.

[Typical physical and chemical properties]

Appearance: colorless to pale yellow, evenly dissolved liquid (translucent)

Solid content: 10% to 12%

pH: 6-8

Viscosity: 20 ~ 50s (based on the coating 1 viscosity meter)

Conductivity: 0.2 ~ 0.3S / m

[Quenching and cooling characteristics] The cooling rate is faster in the initial quenching stage, and the cooling rate is slower in the boiling stage, which is beneficial to obtain martensite. When entering the convection stage, the cooling capacity is much slower than that of water, so that the workpiece can be quenched. Deformation and cracking tendency.

【The main purpose】

1 The medium has been widely used in induction heating quenching and cooling, and is mostly used for high frequency and medium frequency quenching cooling of carbon steel and alloy steel.

2 The quenching agent can also be used for quenching of the whole heated workpiece, for example: 40Cr, 40CrMo, 40Mn2, 45Mn2, 30CrMnSi steel, GCr15, 9CrSi steel and other rollers for quenching and tempering and 42CrMo, Crl2, Cr12Mo and other mold quenching.

3 is also applicable to quenching of steel parts such as 45Cr, 20CrMo, 35CrMo, 40CrMnMo, 45CMnB, 45CMnB, 40Mn3, 45Mn3, 42CrNi, 9Cr3, 3Cr2W8, 50Mo. The concentration (mass fraction) used is usually 3% to 5%.

4 The quenching agent is not suitable for quenching parts heated by a salt furnace. The inorganic salt brought in by the work causes decomposition of the quenching agent, resulting in a change in cooling performance.

[Precautions for use]

1 In the production, the medium concentration is usually controlled by adding the synthetic quenching agent stock solution on a regular basis (weekly or every ten days), depending on the frequency of use and experience.

2 The temperature of the quenching medium has a certain relationship with the cooling performance. When the temperature rises, the cooling rate becomes slower. When the liquid temperature is >50 °C, the cooling rate changes greatly. Therefore, the liquid temperature is generally controlled at 20 to 45 °C.

[Media Maintenance]

1 Reasonable mixing can ensure the stability of the medium performance and the service life of the medium. It is usually carried out by pump or propeller. When pumping with a pump, the flow rate of the medium is preferably less than 1 m/s. It is necessary to avoid air being trapped in the liquid. When stirring with a propeller, the rotation speed is preferably 100-450 r/min. Frequent agitation prevents mold formation and allows a small amount of mold that has formed to die and die.

2 Another way to prevent mold mildew is to add an appropriate amount of preservatives, such as sodium benzoate, to the medium.

3 The period of use is mainly determined by the production situation and the degree of cleanliness of maintenance. Practice shows that the service period is 0.5 to 3 years.

4 The quenching agent is afraid of freezing, and should be stored and transported under the condition of temperature > 5 ° C. If it is frozen and crystallized, it will be scrapped. Storage conditions should be in a cool place.

5 National sewage discharge standard is 100mg / L. The water-soluble synthetic quenching agent has a biological oxygen consumption of 68.4 mg/L, which is lower than the national sewage discharge standard. Therefore, it can be discharged freely. If the medium concentration is high, it can be diluted with water to make its biological oxygen consumption lower than the national standard.

071 THIF-502 waterborne quenching agent

[Introduction] The medium has a hardened layer depth, uniform quenching hardness, no soft spots, and greatly reduces the tendency of quenching deformation and cracking. The medium is non-toxic, has no oil smoke, does not burn, has no fire hazard, is safe to use, improves the working environment, and has no environmental pollution.

It has no corrosion to ferrous and non-ferrous metals. The quenched workpiece is bright and has short-term anti-rust effect. It can be directly tempered without cleaning. The medium is not easy to age, deteriorates, and has a long service life. After use, the amount of media is small, the cost of use is low, and the comprehensive economy is good.

[Typical physical and chemical properties]

Appearance: colorless to pale yellow, uniform translucent liquid

Solid content: 10% to 12%

pH: 6-8

Viscosity: 20 ~ 50s (based on the coating 1 viscosity meter)

Conductivity: 0.2 ~ O.3S / m

【The main purpose】

1 This kind of medium has been widely used in induction heating quenching and cooling, and is mostly used for high frequency and medium frequency quenching cooling of carbon steel and alloy steel.

2 The quenching agent can also be used for quenching the whole heated workpiece, for example: 40Cr, 40CrMo, 40Mn2, 45Mn2, 30CrMnSi steel, GCrl5, 9CrSi steel and other rollers for quenching and tempering and 42CrMo, Cr12, Cr12Mo and other mold quenching.

3 is also suitable for quenching of steel parts such as 45Cr, 20CrMo, 35CrMo, 40CrMnMo, 45CMnB, 40Mn3, 45Mn3, 42CrNi, 9Cr3, 3Cr2W8, 50Mo. The concentration (mass fraction) used is usually 3% to 5%.

4 The medium is especially suitable for low and medium carbon steel induction and large part quenching.

【Precautions】

1 As the concentration of the quenching agent increases, the cooling capacity of the medium decreases significantly. In order to ensure that the workpiece is quenched to achieve the required hardness without quenching cracks, the concentration of the quenching medium must be stabilized within a certain range. In the course of use, the medium concentration is usually controlled by adding the synthetic quenching agent stock solution on a regular basis (weekly or every ten days), depending on the frequency of use and experience.

2 The temperature of the quenching medium has a certain relationship with the cooling performance. When the temperature rises, the cooling rate becomes slower. When the liquid temperature is higher than 50 °C, the cooling rate changes greatly. Therefore, the liquid temperature is generally controlled at 20 to 45 °C.

[Media Maintenance]

1 In order to extend the service life of the medium, care should be taken to properly stir during use. Reasonable mixing ensures stable performance of the media. It is usually carried out by pump or propeller. When pumping with a pump, the flow rate of the medium is preferably less than 1 m/s. It is necessary to avoid air being trapped in the liquid. When stirring with a propeller, the rotation speed is preferably 100-450 r/min. Frequent agitation prevents the formation of mold and can cause a small amount of mold that has formed to die and die.

Another way to prevent mold mildew is to add an appropriate amount of preservative, such as sodium benzoate, to the medium.

2 The period of use is mainly determined by the production situation and the degree of cleanliness of maintenance. Practice shows that the service period is 0.5 to 3 years.

3 The national sewage discharge standard is l00mg/L. The water-soluble synthetic quenching agent has a biological oxygen consumption of 68.4 mg/L, which is lower than the national sewage discharge standard. Therefore, it can be discharged freely. If the medium concentration is high for some reason, it can be diluted with water to make its biological oxygen consumption lower than the national standard.

[Storage and transportation] The quenching agent stock solution is afraid of freezing and should be stored and transported at a temperature above 5 °C. If it is frozen and crystallized, it will be scrapped. Due to the inability to transport in winter, users should prepare for winter use before freezing in winter. Storage conditions should be in a cool place.

072 polyether aqueous solution

[Introduction] It is prepared from a random copolymer of ethylene oxide and propylene oxide. The main component has a molecular weight of about 13,000. Polyether media is the most widely used organic quenching fluid. It is a dark brown viscous liquid. It is miscible with water in any proportion and has an exothermic phenomenon. For higher concentrations of polyether aqueous solution, when the temperature rises, the solution will be cloudy, and the temperature will be cloud point when it is cloudy.

However, when the temperature continues to rise to 70-80 ° C, the polyether will precipitate out of the water. When the temperature of the medium drops to <70 ° C, the polyether will re-explode. The polyether occurs in the anti-loose phenomenon, which greatly reduces the impact on the parts when the vapor film breaks, eliminates the uneven cooling caused by the poor surface condition of the workpiece in the high temperature region, and effectively controls the quenching deformation and cracking.

When the surface temperature of the workpiece is <70 to 80 ° C, the film is redissolved again. The more the polyether content, the thicker the surface film. The concentration of the polyether aqueous solution is closer to the low temperature during quenching, and the thicker the separator is below the Ms point, so the cooling rate is smaller.

[Quenching and cooling characteristics] The CP values ​​are shown in Table 2-15.

【The main purpose】

1 can be used in various automotive parts and aerospace industry, aluminum alloy and titanium alloy, alloy steel forging die quenching, high torque diesel engine crankshaft induction heating quenching. It is usually used for high-frequency surface quenching with a concentration (mass fraction) of 1% to 2%.

2 Using a concentration of 5% (mass fraction), the cooling can be more uniform, avoiding the soft spots often generated during water quenching.

3 Use 10% to 20% concentration (mass fraction) to speed up the cooling and apply to the quenching of low-hardenability steel.

4 Use 20% ~ 30% concentration (mass fraction), can be applied to the overall and surface quenching of steel.

545, T8A and other carbon steel complex parts are quenched and can be formulated into 20%~25% polyether solution.

Alloy parts such as 640Cr are quenched in general shape and can be formulated into 40% to 45% polyether solution.

740Cr gear high frequency heating quenching, can be formulated into 4% ~ 6% polyether solution, can replace 15% ~ 20% emulsion.

8 An aqueous solution containing 1% to 30% of polyether can be used for cooling of aerospace parts such as aluminum alloy and titanium alloy steel.

9 Quenching the 45 steel bearing ring with a 15% polyether aqueous solution quenching medium, while obtaining high hardness, significantly reduces the quenching deformation.

[Precautions for use] The operating temperature is generally 35 to 50 °C. For aluminum alloy <25 ° C. However, large cross-section high-hardenability alloy steel requires high bath temperature and high concentration to reduce the large stress on the workpiece. Some steels (such as AISI 5160) have an operating temperature of 70 °C.

073 CL-l polyether aqueous solution

[Introduction] Polyether polyol (referred to as polyether) is an important derivative of propylene oxide. It is used as a quenching agent. It can be miscible with water in any proportion. It has a reverse dissolution phenomenon and greatly weakens the parts of the vapor film when it breaks. The impact eliminates the uneven cooling caused by the poor surface condition of the workpiece in the high temperature region, and effectively controls the quenching deformation and cracking.

[Typical physical and chemical properties] The CP values ​​are shown in Table 2-16.

【The main purpose】

1 It can be used for quenching of aluminum alloy, titanium alloy and alloy steel forging die of various automotive parts and aviation industry.

2 diesel engine crankshaft induction heating quenching and so on.

Overall quenching of steel parts such as 345 steel bearing rings.

074 "903" polyether aqueous solution

[Introduction] Same as 073.

[Quenching and cooling characteristics] The CP values ​​are shown in Table 2-17.

【The main purpose】

1 It can be used for quenching of aluminum alloy, titanium alloy and alloy steel forging die of various automotive parts and aviation industry.

2 diesel engine crankshaft induction heating quenching and so on.

Overall quenching of steel parts such as 345 steel bearing rings.

075 Japan UCON polyether solution

[Introduction] Due to the water solubility and oil solubility and reverse solubility of polyether, cooling, lubricity, no precipitation and foaming tendency, and good penetration, do not corrode most metals, and are less affected by water quality and water hardness.

This medium is supplied by UCC Corporation of Japan. The ratio of oxyethylene (formerly called oxyethylene) to oxypropylene (formerly oxypropylene) is 75:25.

This UCON aqueous solution is similar to the use of ordinary polyether media. The cost of the polyether medium is higher than that of the oil, which is due to the adhesion of the working surface to the working surface in the low temperature region, and the higher the concentration, the thicker the drum. Such quenching liquids need to be used with caution.

【The main purpose】

1 When the polyether concentration (mass fraction) in the medium is 3% to 5%, the cooling performance is equivalent to a strong alkali aqueous solution.

2 When the concentration (mass fraction) is 5% to 10%, the cooling performance is equivalent to water.

3 When the concentration (mass fraction) is >10%, the cooling performance is equivalent to oil.

076 UCON A, B quenching agent

[Introduction] The patented products of Dow Chemical Company of the United States are known as "universal quenching agent" in the heat treatment industry abroad. It is an international famous brand product and belongs to PAG type high molecular polymer. The cooling performance is very stable and has anti-corrosion effect.

The hand-held refractometer is used to measure the "true concentration" of the quenching liquid, which is not affected by the dust and scale in the quenching liquid. There is no so-called "false concentration" problem, which avoids the two factors of the hardenability fluctuation of the part material and the failure of the quenching agent. Quenching cracking accidents occur, in line with the environmental protection requirements of advanced countries in Europe and America.

【The main purpose】

1 railway locomotive industry 42CrMo gear plate.

2 Auto parts industry 42CrMo crankshaft, front cymbal, half shaft, drive shaft, steering knuckle.

3 standard parts industry 40Cr high strength bolts.

4 Construction machinery industry forks, bushings, chain links, rolling bearings.

5 pressure vessel industry 35CrMo high pressure container.

6 aircraft manufacturing aluminum alloy parts.

7 The product has adjustable cooling speed, covering water-oil, and can replace oil quenching. It can be used for induction hardening as well as quenching and tempering.

077 Wonder Queneh PA

[Introduction] It is a non-combustible water-soluble polymer quenching agent composed of organic polymer and corrosion inhibitor. The organic polymer is completely dissolved in water to form a clear, homogeneous aqueous solution. However, when the temperature exceeds 74 ° C, the polymer separates out from the water to form an insoluble phase. The medium overcomes the shortcomings of rapid water cooling, easy cracking of the workpiece, slow cooling of the oil product, poor quenching effect and flammability.

When quenching with a dilute solution of the medium, the hardened layer is deep, the quenching hardness is uniform, and there is no soft point. The tendency of quenching deformation and cracking is greatly reduced. The water-based quenching agent has no corrosion to ferrous and non-ferrous metals, and the quenched workpiece is bright and has a short-term anti-rust effect. This medium removes soot, coal ash and debris compared to conventional oil quenching oils, making equipment maintenance and factory cleaning easier.

【The main purpose】

1 Small mechanical parts such as screws, screws, nuts, fasteners, nuts, hardware parts, car or bicycle parts, hand tools, etc. quenching (net belt furnace).

2 Suitable for induction hardening and flame hardening, such as gears, crankshafts, camshafts, etc., as well as complex and demanding workpieces with geometrical appearance.

8 continuous mesh belt furnace, multi-purpose box furnace, pit furnace, trolley furnace, high frequency or medium frequency heat treatment.

4 small batches of carburized parts (well type electric furnace), carburizing, carbonitriding, quenching and tempering of endothermic or exothermic furnaces (intermittent and continuous operation).

5 can be used for aluminum alloy forging, casting and immersion brazing.

[Precautions for use]

1 The medium solidifies below 0 ° C and needs to be thawed and mixed at room temperature before use.

2 It is recommended that the optimum medium temperature is 20~50°C, and the temperature should be ≤60°C.

3 The cooling can be controlled by adjusting the temperature of the quenching liquid or the degree of agitation, and it can be obtained near water, or between water and oil, and equivalent to oil or slower cooling rate.

4 The medium is not easily deteriorated and oxidized compared to ordinary polyvinyl alcohol and dissolved oil. It is necessary to peel and fill a small amount of water lost by evaporation.

07S PAG quenching agent

[Introduction] PAG quenching agent is easily soluble in water, and the concentration is easy to measure and easy to control. It can be combined with water to form quenching liquid with different concentration and various cooling characteristics to meet different heat treatment requirements; chemical stability and long service life; quenching liquid does not burn, no fire hazard; smokeless gas during quenching, clean production environment; There is no carbon deposits, sludge, etc. in the workplace and equipment, which is easy to maintain and easy to clean. Even if it is not cleaned and tempered, there is no smoke. It is currently the most respected water-soluble quenching agent in foreign countries.

When quenched with PAG, the amount of take-up is much smaller, which reduces the cost of use. Since the maximum use temperature required for the PAG quenching liquid is about 10 ° C below the cloud point, the lower the cloud point, the narrower the allowable temperature range of the quenching liquid; the wider the cloud point, the wider. Therefore, it is not good for the cloud point to be too low.

The PAG quenching liquid is generally the best in the middle and high cloud point, and it is generally preferred to select the PAG quenching agent with a cloud point in the range of 70-75 °C.

【The main purpose】

1PAG quenching agent is mainly suitable for carbon structural steel and carbon tool steel. Integral diffuse quenching and induction heating quenching of low-medium alloy structural steel and most carburized steel, spring steel, and bearing steel.

2 It is suitable for the quenching of martensitic stainless steel with carbon content (mass percentage) ≤ 0.25%, solid solution hardening and hardening of age hardening aluminum alloy.

3 After the original workpiece with water quenching oil is changed to PAG quenching agent, single-liquid quenching can be carried out, and once cooled, the quenching effect of high hardness without cracking can be obtained.

4 From the polyvinyl alcohol quenching liquid to the PAG quenching agent, it can overcome the shortcomings such as the easy deterioration of the quenching liquid and the poor control of the effective concentration.

5 Generally speaking, the workpiece heated by the salt furnace is not suitable for quenching in the water-soluble quenching liquid.

6 The medium is suitable for the case where the water quenching distortion is too large or even cracked, and the quenching oil is quenched and not ignited.

7 The quenching tank is too small or the total amount of quenching liquid is too small. The liquid temperature in production is easy to rise to the quenching cooling system of the quenching liquid cloud point temperature, and it is not suitable for using PAG quenching liquid.

8 Induction heating spray quenching, if there is no quenching liquid reflux recovery device after spraying, it is not suitable to use PAG quenching liquid, otherwise the consumption is too large.

9 5% ~ 15% PAG instead of oil cooling, the cost is only 1 / 6 ~ 1/2 of the oil.

[Precautions for use]

The method of using 1PAG quenching liquid is basically the same as when using tap water, except that the quenching heating temperature of steel parts can be lower than that when quenching with oil, and it is higher than when using tap water. If the quenching heating temperature is too high, it may cause quenching and cracking.

2 Changing the concentration can greatly adjust the quenching cooling rate of the quenching liquid. When the liquid temperature of the PAG quenching liquid rises, the cooling rate obtained by the steel part is lowered; on the contrary, the liquid temperature is lowered and the cooling rate is increased. The relative flow rate between the workpiece and the quenching liquid increases during quenching, and the cooling rate obtained by the workpiece increases; the relative flow rate decreases, and the cooling rate decreases.

3 pairs of the same PAG quenching liquid, the refractive index reading is the high and low concentration of PAG quenching agent. It is suitable for the treatment of steel parts which are easy to be quenched at high concentration, and is suitable for processing steel parts which require sufficient hardening and are not easy to be quenched at low concentration.

4 For the quenching liquid prepared by different kinds of PAG quenching agents, because of the different levels of quenching and cooling characteristics of various varieties, it is not possible to judge the cooling rate by simply using the refractive index.

5 concentration, liquid temperature and relative flow rate are the three basic process parameters for adjusting the cooling characteristics of PAG quenching liquid. When the concentration is low, the quenching heating temperature and the liquid temperature are appropriately lowered to prevent quenching; when the concentration is high, the swing of the workpiece is accelerated to ensure hardening.

6 During quenching and cooling, the PAG quenching agent forms a polymer coating on the surface of the workpiece to control the cooling rate. After the workpiece is cooled down, the coating should be redissolved back to the quenching liquid for repeated use. The more complete the remelting, the less the quenching agent is consumed and the lower the production cost.

7PAG is sensitive to temperature and oil, and its temperature range is narrow, usually 20 to 50 °C. It is required to have sufficient cooling capacity, especially in the south of summer.

8PAG is sensitive to concentration and uses a narrow concentration range, typically ±1%. It is required to constantly check the concentration of the working fluid and periodically check the concentration factor.

9 When stirring in the quenching area of ​​the workpiece, it is necessary to ensure the mixing strength of the medium, the uniformity of the mixing and the uniformity of the cooling.

079 WQA type quenching agent

[Introduction] It is characterized by safety, environmental protection and stable chemical properties. Instead of quenching oil, the workpiece can be quenched with high hardness and reduced deformation.

【The main purpose】

1 In the dip quenching, it is mainly used for the quenching of quenched and tempered copper and the heat treatment process of induction quenching and flame quenching.

2 used for quenching aluminum parts, so that the aluminum parts are not deformed.

3 It is applied to heat treatment such as quenching, carburizing or carbonitriding of various metal parts.

4 Suitable for all types of heat treatment furnaces.

080 WQB type quenching agent

【Introduction】 It is a PAG-based synthetic quenching agent. It is safer and more environmentally friendly than oily products. The concentration (mass fraction) is generally 5% to 20% of the original liquid. It does not cause fire or smoke when oil quenching occurs. The medium can generally be used in water at a ratio of 1:15 to 1:4, which is much lower than the price of the oil after dilution.

Since its specific heat value is much higher than that of oil, the production efficiency can be significantly improved. For many materials and various types of workpieces, the oil is changed to the quenching agent, the hardness is generally increased by 2HRC, and the amount of deformation is reduced.

The quenching agent has much better chemical properties than the polyvinyl alcohol quenching agent. It is mixed with a small amount of acid, alkali and salt. The influence of impurities is not too big, and it does not deteriorate immediately. Unlike polyvinyl alcohol, it is easily deteriorated.

【The main purpose】

1 It is applied to heat treatment such as quenching, carburizing or carbonitriding of various metal parts.

2 Suitable for all types of heat treatment furnaces.

3 In the dip quenching, it is mainly used for the quenching of quenched and tempered steel and the heat treatment process of induction quenching and flame quenching.

4 used for quenching aluminum parts, not easy to deform.

5A chain factory chain is quenched with No.32 mechanical oil, quenching hardness 52HRC, tempering hardness 44HRC, breaking force 20kN, ductile fracture; and using the quenching agent, quenching hardness 55HRC, tempering hardness 45HRC, breaking force 20.2kN , ductile fracture, a number of properties are better than oil quenching.

6 Quenching with water is too large or even cracked, and quenching with over-speed quenching oil does not get angry. At this time, the medium should be considered.

[Precautions for use]

1 The quenching agent is sensitive to temperature and oil, and has a narrow temperature range, usually 20 to 50 °C. It is required to have sufficient cooling capacity, especially in the summer in the south.

2 The concentration of the quenching agent is relatively sensitive, and the concentration range used is narrow, usually ±1%. It is required to constantly check the concentration of the working fluid and periodically check the concentration factor.

3PAG has strict requirements on the degree of agitation. When stirring in the quenching area of ​​the workpiece, it is necessary to ensure the mixing intensity, the uniformity of the mixing and the uniformity of the cooling.

4 This quenching wattle is more susceptible to contamination than oil and requires careful protection.

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