摘要
ERH end-quenching method was used to determine the hardenability of four kinds hot-forging die steels with deep-hardening and hence the order of their hardenability was given.The tempering hardness of the steels was measured and the tempering resistance was studied.It was approved that ERH method is effective for the determination of hardenability of deep-hardening steel and the beginning of hardness drop in the ERH specimen is caused by bainite occurring.
ERH end-quenching method was us ed to determine the hardenability of four kinds hot-forging die steels with dee p-hardening and hence the order of their hardenability was given. The tempering hardness of the steels was measured and the tempering resistance was studied. I t was approved that ERH method is effective for the determination of hardenabili ty of deep-hardening steel and the beginning of hardness drop in the ERH specim en is caused by bainite occurring.
基金
Project sponsored by Research Fund for Doctoral Program of Higher Education(9514509)
