The surface microhardness had improved from 160HV0.05 of the initial sample to 335HV0.05 after CRPD.
样品表面的显微硬度值达到了335HV0.05，与基体相比表面硬度提高两倍左右。
Make sure decarbonization was not found on the surface of the sample.
先确认表面是否存在脱碳现象。
Make sure decarbonization was not found on the surface of the sample.
先确认表面是否存在脱碳现象。
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