Heat Treatment of Metals ›› 2020, Vol. 45 ›› Issue (9): 10-20.DOI: 10.13251/j.issn.0254-6051.2020.09.002

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Research status of thermal fatigue mechanisms and performance improvement of hot work die steel

Zhang Xu, He Wenchao, Li Donghui, Xiao Maoguo, Li Shaohong   

  1. Faculty of Materials Science and Engineering,Kunming University of Science and Technology,Kunming Yunnan 650093,China
  • Received:2020-03-22 Online:2020-09-25 Published:2020-12-29

Abstract: Thermal fatigue performance of hot work die steel is the main factor that affects the service life of dies.The research status and evaluation methods of thermal fatigue performance of hot work die steel were overviewed,the effects of structural evolution,crack initiation and propagation on thermal fatigue performance were analyzed.At the same time,the factors influencing the thermal fatigue performance and the methods to improve the thermal fatigue performance were discussed and summarized,and the trend of the thermal fatigue research of hot work die steel was prospected.

Key words: hot work die steel, thermal fatigue, crack initiation, crack propagation

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