This standard specifies the technical requirements and metallographic levels for metallographic structure inspection of carburizing and quenching and tempering of heavy-duty gears. This standard is applicable to the metallographic inspection of heavy-duty carburized gears made of steel such as 20CrMnTi, 20CrMnMo, 20CrNi3Mo, 15CrNi3Mo, 10Cr12Bu4, etc. JB/T 6141.3-1992 Metallurgical inspection of carburizing of heavy-duty gears JB/T6141.3-1992 Standard download and decompression password: www.bzxz.net

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