Transactions of Materials and Heat Treatment

Title：Effect of quenching and tempering temperature on microstructure andperformance of hot-work die steel

Authors： Li Haidong

Unit： Lianyungang Technical College

KeyWords： die steel thermal fatigue quenching tempering port morphology crack

ClassificationCode：TG316

year,vol(issue):pagenumber：2014,39(9):111-115

Abstract：

After quenching and tempering for the hot-work die steel, the effect of quenching temperature and tempering temperature on the hardness and thermal fatigue resistance of die steel was studied, the broke mouth shape of the impact fracture and broke mouth characteristic of the thermal cycling fatigue fracture of die steel were observed, the quenching and tempering technology of hot-work die steel was optimized and its influence regulation and mechanism of action on heat fatigue properties were also analyzed. The results show that the main crack of fatigue crack is the shortest and the smallest at 1080 ℃, so the samples after quenching at 1080 ℃ have a better thermal fatigue resistance; 580 ℃ +560 ℃ tempering samples show good performance of thermal fatigue resistance.

Funds：

江苏省连云港科技发展计划项目

李海东（1969-），男，硕士，副教授

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