Research on Heat Treatment Process and Property of 42CrMo4 Large Section Spindle Forging
This paper studies the large-sized 42CrMo4 spindle forging for unsatisfactory impact energy and section shrinkage after normal quenching and tempering by supplementary tempering and subthermal quenching tests.The results show that with increase of tempering time and temperature,strength of the forging part decreases while section shrinkage and impact energy improves,but the impact energy still does not meet technical requirement.Subthermal quenching can significantly improve toughness of the material,and the spindle forging can meet all performance requirements.
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