After vaccum carburizing and high-pressure gas quenching low temperature tempering heat treat-ment,cracks were found in gear grinding process of the 20CrMnTi gear.The cracking causes of the 20CrMnTi gears were analyzed by means of chemical composition analysis,hardness test,metallographic structure observation and fracture morphology,etc.The results showed that the overburning defect in the gear blank was the fundamental cause of gear cracking.
万方数据
维普
