| 稀土变质及热处理对低铬耐磨铸铁热疲劳裂纹形成的影响 |
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| 引用本文： | 于昆,李小娟,薛云.稀土变质及热处理对低铬耐磨铸铁热疲劳裂纹形成的影响[J].热加工工艺,2007,36(9):57-58. |
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| 作者姓名： | 于昆 李小娟 薛云 |
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| 作者单位： | 1. 秦皇岛职业技术学院,机电工程系,河北,秦皇岛,066100
2. 河北建材职业技术学院建筑材料系,河北,秦皇岛,066004 |
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| 摘 要： | 研究了稀土变质及热处理对低铬耐磨铸铁热疲劳裂纹形成的影响。结果表明：低铬耐磨铸铁热疲劳裂纹主要萌生于共晶碳化物处，裂纹以自身发展和彼此连接、汇合方式长大，稀土元素能改善共晶碳化物的形状。抑制热疲劳裂纹的萌生与扩展，与热处理共同作用效果更明显。
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| 关 键 词： | 低铬耐磨铸铁 热疲劳裂纹 稀土 热处理 |
| 文章编号： | 1001-3814（2007）01-0057-02 |
| 修稿时间： | 2007-01-11 |
Effect of RE Modification and Heat Treatment on Formation of Thermal Fatigue Crack in Low Chromium Wear-Resistant Cast Iron |
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| YU Kun,LI Xiao-juan,XUE Yun.Effect of RE Modification and Heat Treatment on Formation of Thermal Fatigue Crack in Low Chromium Wear-Resistant Cast Iron[J].Hot Working Technology,2007,36(9):57-58. |
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| Authors: | YU Kun LI Xiao-juan XUE Yun |
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| Affiliation: | 1. Department of Electromechanical Engineering, Qinhuangdao Vocational Technological College, Qinhuangdao 066100, China; 2.Department of Building Material, Hebei Building Material College of Professional Technology, Qinhuangdao 066004, China |
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| Abstract: | The effect of RE modification and heat treatment on formation of thermal fatigue crack in low chromium wear-resistant cast iron was investigated. The results show that the thermal fatigue cracks are mainly generated in eutectic carbides, and the cracks grow by themselves spreading and join each other. RE can improve the morphology of eutectic carbides, inhibit the generation and propagation of thermal fatigue cracks, and especially, the effect is more noticeable in case of the RE modification in combination with heat treatment. |
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| Keywords: | low chromium wear-resistant cast iron thermal fatigue crack RE heat treatment |
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