Effect of Cryogenic Treatment on Properties of Cr8-Type Cold Work Die Steel

钢铁研究学报(英文版), 2010, 17(6): 43-59.

^1, , ^2, , ^3, , ^4, , ^5, , ^6,

1.Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China; Institute for Structural Materials, Central Iron and Steel Research Institute, Beijing 100081, China

2.Institute for Structural Materials, Central Iron and Steel Research Institute, Beijing 100081, China

3.Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China; Institute for Structural Materials, Central Iron and Steel Research Institute, Beijing 100081, China

4.Heye Special Steel Co Ltd, Shijiazhuang 050031, Hebei, China

5.Heye Special Steel Co Ltd, Shijiazhuang 050031, Hebei, China

6.Institute for Structural Materials, Central Iron and Steel Research Institute, Beijing 100081, China

基金项目: National Key Technologies Research and Development Program of China(2007BAE510B04)

Effect of Cryogenic Treatment on Properties of Cr8-Type Cold Work Die Steel

CHI Hong-xiao ^1, , MA Dang-shen ^2, , YONG Qi-long ^3, , WU Li-zhi ^4, , ZHANG Zhan-pu ^5, , WANG Yong-wei ^6,

2.Institute for Structural Materials, Central Iron and Steel Research Institute, Beijing 100081, China

4.Heye Special Steel Co Ltd, Shijiazhuang 050031, Hebei, China

5.Heye Special Steel Co Ltd, Shijiazhuang 050031, Hebei, China

6.Institute for Structural Materials, Central Iron and Steel Research Institute, Beijing 100081, China

Keywords： cryogenic treatment

The effect of cryogenic treatment on the properties of Cr8-type cold work die steel was investigated. The results show that cryogenic treatment increases hardness by decreasing retained austenite, but the degree depends on the austenitizing temperature. When quenching at lower austenitizing temperature, the steel can obtain higher toughness by cryogenic treatment substituting conventional treatment process. Cryogenic time has little effect on cryogenic treatment. Conversely, cryogenic temperature has a great effect on cryogenic treatment and the effect of cryogenic treatment is more obvious with decreasing cryogenic temperature. In addition, deep cryogenic treatment improves the wear resistance by precipitating more homogeneous specific carbides.

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Effect of Cryogenic Treatment on Properties of Cr8-Type Cold Work Die Steel

参考文献