| 残余奥氏体的形态和分布对9SiCr工具钢强韧性的影响 |
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| 引用本文： | 李士燕,曹规循,周国萍. 残余奥氏体的形态和分布对9SiCr工具钢强韧性的影响[J]. 兰州理工大学学报, 1992, 0(3) |
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| 作者姓名： | 李士燕 曹规循 周国萍 |
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| 作者单位： | 甘肃工业大学机械工程一系(李士燕)，甘肃科委测试中心(曹规循)，甘肃工业大学机械工程一系(周国萍) |
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| 摘 要： | 本文研究了残余奥氏体对Si-Cr钢(含碳量0.9％)的冲击韧性的影响,发现深冷处理后残余奥氏体呈透镜状或膜状并沿马氏体边界分布,多冲周次N值可以提高,模具寿命也可以增加3倍以上。在深冷处理过程中残余奥氏体转变成针状马氏体,而且块状残余奥氏体被针状马氏体分割,使残余奥氏体细化。9SiCr钢经不同时间深冷处理,其冲击韧性差别很大。
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| 关 键 词： | 工具钢 冷处理 冲击韧性 残余奥氏体 模具 |
The Effect of the Shape and Distribution of Retained Austenite on Strength-toughness Properties of 9SiCr Tool Steel |
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| Li Shiyan. The Effect of the Shape and Distribution of Retained Austenite on Strength-toughness Properties of 9SiCr Tool Steel[J]. Journal of Lanzhou University of Technology, 1992, 0(3) |
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| Authors: | Li Shiyan |
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| Affiliation: | Li Shiyan (Dept. of Mechanical Engineering (I))Cao Guixun (Gansu Science and Technique Commisson Measurement Center)Zhou Kuoping (Dept. of First Mechanical Engineering) |
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| Abstract: | This paper investigates on the effect of retained austenite on the impact toughness of the SiCr steel with carbon content of 0. 9%. It is found that after cryogenic treatment the retained austenite appeared a convex lens-like or coat-like pattern that is distributed a-long the fringe of martensites. The multi-impact frequency N may be increased and the service life of the dies also can be increaed over 3 times. The study shows that retained austenite may be transformed into the needle-like martensite in cryogenic treatment and lumpish-like austenite are comminuted and fined by needle-like martensite. The impact toughness of 9Si-Cr steel is quite different when the steel is cryogenically treated with different time duration. |
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| Keywords: | tool steel cold treatment impact toughness ratained austenite die |
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