| 深冷处理对20CrMnTi钢渗碳齿轮硬度和残余奥氏体评定的影响 |
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| 引用本文： | 施友方. 深冷处理对20CrMnTi钢渗碳齿轮硬度和残余奥氏体评定的影响[J]. 理化检验(物理分册), 2000, 36(3): 119-121 |
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| 作者姓名： | 施友方 |
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| 作者单位： | 上海大学嘉定通用机械厂,上海,201818 |
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| 摘 要： | ２０ＣｒＭｎＴｉ钢渗碳齿轮最表层硬度偏低，系残余奥氏体量过多所致。通过深冷处理可使部分残余奥氏体转变成马氏体，从而提高了表面硬度，对金相法评定残余奥氏体的局限性进行了探讨。
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| 关 键 词： | 硬度 深冷处理 残余奥氏体 渗碳齿轮 20CrMnTi钢 |
| 修稿时间： | 1999-07-12 |
EFFECT OF SUBZERO TREATMENT ON SURFACE LAYER HARDNESS AND RETAINED AUSTENITE EVALUATION OF CARBURIZED 20CrMnTi GEAR |
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| Shi Youfang. EFFECT OF SUBZERO TREATMENT ON SURFACE LAYER HARDNESS AND RETAINED AUSTENITE EVALUATION OF CARBURIZED 20CrMnTi GEAR[J]. Physical Testing and Chemical Analysis Part A:Physical Testing, 2000, 36(3): 119-121 |
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| Authors: | Shi Youfang |
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| Affiliation: | Shi Youfang;(General Machinery Factory, Shanghai University) |
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| Abstract: | Lower surface layer hardness in carburized 20CrMnTi gear was a result of excesssive amount of retained austenite. A study was wade to increase its surface layer hardness by subzero treatment, during which retained austenite transformed into martensite. A discussion was made on limitation of metallographic evaluation of retained austenite. |
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| Keywords: | Hardness Effective case depth Subzero treatment Martensite Retained austenite |
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