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40Mn2钢支撑辊主要用于大型推土机和挖掘机的钢带上,受力大,对其性能要求较高,热处理要求对外表面进行高频感应淬火及整体回火处理。某厂在对一批40Mn2钢支撑辊进行高频感应淬火时发生了严重的裂纹,为此,对支撑辊热处理裂纹形成原因进行了检验和分析。1理化检验1.1外观形貌图1
40Mn2 steel backup roller is mainly used for large bulldozers and excavators on the strip, the stress, the higher performance requirements, heat treatment requires the outer surface of the high-frequency induction hardening and tempering the overall treatment. A factory in a group of 40Mn2 steel backing roller for high-frequency induction hardening occurred serious cracks, therefore, the support roller heat treatment cracks were tested and analyzed. 1 Physical and Chemical Testing 1.1 Appearance Figure 1