| Effect of Hot Deformation on Formation and Growth of Thermal Fatigue Crack in Chromium Wear Resistant Cast Iron |
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| 作者姓名： | CHANG Li-min LIU Jian-hua |
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| 作者单位： | [1]Analysis and Measure Center, Jilin Normal University, Siping 136000, Jilin, China [2]Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, Hebei, China |
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| 基金项目： | Item Sponsored by Guiding Program of Science and Technology Research of Jilin Province of China （20000513） |
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| 摘 要： | Chromium wear resistant cast iron is widelyusedin engineering, mining and power industry forits high strength,hardness and wear resistance .Inproduction process , some wear-resistant parts ser-ving in alternative stress due to rapid heating andcooling rate ofteninduces thermal fatigue andresultsinfailure .The badthermal fatigue property of chro-mium wear resistant cast iron is due to eutectic car-bides which distribute as continuous net in matrix.Recent researches showthat hot deformation can …
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| 关 键 词： | 热加工 铬铸铁 热疲劳裂纹 裂纹生长 磨损抗力 |
| 收稿时间： | 2004-07-09 |
Effect of Hot Deformation on Formation and Growth of Thermal Fatigue Crack in Chromium Wear Resistant Cast Iron |
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| CHANG Li-min LIU Jian-hua.Effect of Hot Deformation on Formation and Growth of Thermal Fatigue Crack in Chromium Wear Resistant Cast Iron[J].Journal of Iron and Steel Research,2006,13(1):36-39. |
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| Authors: | CHANG Li-min LIU Jian-hua |
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| Affiliation: | 1. Analysis and Measure Center, Jilin Normal University, Siping 136000, Jilin, China
2. Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, Hebei, China |
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| Abstract: | The formation and growth of thermal fatigue crack in chromium wear resistant cast iron was investigated, and the effect of hot deformation on the crack was analyzed by means of optical microscope and scanning electron microscope and high frequency induction thermal fatigue tester. The results show that eutectic carbide is the main location and passage for initiation and extension of thermal fatigue cracks, hot deformation can improve the eutectic carbide′s morphology and distribution, inhibit the generation and propagation of thermal fatigue cracks. In the experiment, the propagation rate of thermal fatigue crack reduces with the quantity of hot deformation increasing, which was analyzed in the point view of the activation energy of crack propagation. |
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| Keywords: | hot deformation chromium wear resistant cast iron thermal fatigue crack |
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