The durability of W18Cr4V high speed steel tools can be significantly improved after laser strengthening, which is of great significance for ensuring processing quality, increasing productivity and reducing costs. It is very suitable for the tool to use a solid pulsed laser for local strengthening. The reason why high-power CO_2 continuous lasers are not used is because such lasers have high cost, low life, unstable output, large floor space, inconvenient use and maintenance, and especially easy overheating of metals. High speed steel is laser enhanced, due to laser heating and cooling
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