| 引用本文: | 宋百隆,王玉江,张平,魏世丞,盛忠起,王亚子.含碳量对Mn8Cr2Si钢显微组织及性能的影响[J].中国表面工程,2017,30(1):132~140 |
| SONG Bai-long,WANG Yu-jiang,ZHANG Ping,WEI Shi-cheng,SHENG Zhong-qi,WANG Ya-zi.Effects of Carbon Content on Microstructure and Properties of Mn8Cr2Si Steel[J].China Surface Engineering,2017,30(1):132~140 |
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| 含碳量对Mn8Cr2Si钢显微组织及性能的影响 |
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宋百隆1,2, 王玉江2, 张平3, 魏世丞2, 盛忠起1, 王亚子1
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1.东北大学 机械工程与自动化学院, 沈阳 110819;2.装甲兵工程学院 再制造技术重点实验室, 北京 100072;3.装甲兵工程学院 机械产品再制造国家工程研究中心, 北京 100072
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| 摘要: |
| 研究了含碳量对Mn8Cr2Si钢显微组织、力学性能、耐磨性能和耐腐蚀性能的影响。利用光学显微镜（OM）对奥氏体晶粒的尺寸变化进行观察，并利用扫描电子显微镜（SEM）分析冲击断口及磨损形貌。结果表明，随含碳量的增加，奥氏体晶粒逐渐细化，但当含碳质量分数超过0.8%时，晶粒开始粗化。由于奥氏体晶粒细化，其晶界总面积增大，应力集中降低，抑制了裂纹的形成与扩展。因此，奥氏体晶粒越细小，其力学性能越好，而力学性能的提升有助于提高其耐磨性能。分析发现，奥氏体晶粒尺寸同样影响Mn8Cr2Si钢的耐腐蚀性能，细化后的奥氏体晶粒能提高其耐腐蚀性能。当Mn8Cr2Si钢含碳质量分数为0.8%时，晶粒尺寸可细化到143 μm，综合力学性能和耐腐蚀性能优异。 |
| 关键词: Mn8Cr2Si钢 晶粒尺寸 力学性能 显微组织 耐腐蚀性能 |
| DOI：10.11933/j.issn.1007-9289.20160830003 |
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| 基金项目:国家自然科学基金（51222510）；中国工程院咨询研究项目（2015-09-XY-003，2016-06-ZD-01） |
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| Effects of Carbon Content on Microstructure and Properties of Mn8Cr2Si Steel |
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SONG Bai-long1,2, WANG Yu-jiang2, ZHANG Ping3, WEI Shi-cheng2, SHENG Zhong-qi1, WANG Ya-zi1
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1.College of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819;2.Science and Technology on Remanufacturing Laboratory, Academy of Armored Forces Engineering, Beijing 100072;3.National Engineering Research Center for Mechanical Product Remanufacturing, Academy of Armored Forces Engineering, Beijing 100072
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| Abstract: |
| The effects of carbon content on the microstructure, mechanical property, wear resistance and corrosion resistance of Mn8Cr2Si steel was investigated. The change of austenite grain size was observed by optical microscope (OM). The impact fracture and wear morphologies were analyzed by scanning electron microscopy (SEM). The results indicate that the austenite grain becomes refinement with the increase of carbon content. Nevertheless, when the carbon content is over 0.8%, the grain starts to be coarse. Due to the refinement of the austenite grain, the total area of grain boundaries increases and the stress concentration is reduced, which suppress the formation and propagation of cracks. Therefore, the finer the austenite grains, the better the mechanical property is, and the upgrade of mechanical property will help to improve the wear resistance of Mn8Cr2Si steel. It is found that the austenite grain size also affects the corrosion resistance of Mn8Cr2Si steel, and the corrosion resistance can be improved with the refinement of austenite grains. When the carbon content of Mn8Cr2Si steel is 0.8%, the grain size can be refined to be 143 μm, and the composite mechanical property and the corrosion resistance are excellent. |
| Key words: Mn8Cr2Si steel grain size mechanical property microstructure corrosion resistance |
