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The standard sample (standard substance) is a kind of physical standard, and is also a measuring instrument. It is mainly used in the chemical composition control, product analysis, instrument debugging and commodity inspection of aluminum alloys and magnesium alloys. This project includes 13 subitems such as Al-Li alloy and magnesium alloy standard sample, 50 series and 326 standard samples, among which 187 are 24 standard series of important standard samples. The project research lasted for 20 years. After more than 1,000 (furnace) experiments, four new processes including water-cooled semi-continuous casting, flux and sulfur powder protection, Ar gas refining, and surface oxidation and coloring were used to create the “special element addition method. There are seven new technologies, such as "Different Substrate Addition Method", "Diffusion Melting Technology for High-Silicon Aluminum Alloys", "Transformation Technology", and "Standard Data Processing Software (StndMtrl System)". Due to the adoption of the above-mentioned advanced new process and new method, the developed standard sample has uniform chemical composition, accurate and reliable set value, and high working curve engagement coefficient, in which the higher content of aluminum is Cu=20.52%, Si=26.26%, and Fe=15. %, Mn = 19% of the standard sample, breaking the high content of aluminum in domestic and foreign records. The main technical indicators of this standard sample have reached or exceeded the international advanced level of the same standard, and have filled 33 domestic blanks, which meet the urgent needs of the domestic market, can replace similar imported standard samples, and achieve localization of aluminum and magnesium standard samples.
This standard sample has been widely used in defense, military, aerospace, commodity inspection and other fields. More than 3,000 spectrometers in 34 provinces, municipalities, and autonomous regions nationwide use this standard. More than 15,000 sets of spectrometers have been sold in 20 years, saving more than US$58 million (approximately 480 million yuan) in foreign exchange for the country. Economic and social benefits are significant.
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