The surface microhardness of sample A is higher than that of sample B and the carburized layer of sample A is thi.

 
  • 表面显微硬度比较发现,试样A的硬度明显高于试样B,在光学显微镜下观察两试样的截面,试样A渗碳层的厚度明显大于试样B。
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