| 45钢激光相变硬化组织及性能研究 |
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| 引用本文： | 邱星武,李刚,任鑫,邱玲,王晓亮,刘静.45钢激光相变硬化组织及性能研究[J].腐蚀科学与防护技术,2008,20(6):413-415. |
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| 作者姓名： | 邱星武 李刚 任鑫 邱玲 王晓亮 刘静 |
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| 作者单位： | 辽宁工程技术大学材料科学与工程系,阜新,123000 |
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| 摘 要： | 利用轴流CO2激光加工机对45钢在轴流基模条件下进行激光相变硬化处理，并研究了其激光相变硬化组织及性能.结果表明，改性层微观组织由表层至基体依次为：表面熔凝区为片状马氏体，均匀相变硬化区为隐晶马氏体，过渡区为混合马氏体、屈氏体和部分未熔的铁素体；激光相变硬化改性层的硬度与基体相比有大幅度提高；最高硬度（约为基体的3倍）出现在次表层；激光相变硬化处理后耐蚀性有所提高，随扫描速度增加，耐蚀性增强.
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| 关 键 词： | 激光相变硬化 微观组织 硬度 耐蚀性 |
| 收稿时间： | 2007-09-03 |
| 修稿时间： | 2007-12-03 |
STUDY ON MICROSTRUCTURE AND PROPERTIES OF LASER HARDENING OF 45 STEEL |
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| QIU Xing-wu,LI Gang,REN Xin,QIU Ling,WANG Xiao-liang,LIU Jing.STUDY ON MICROSTRUCTURE AND PROPERTIES OF LASER HARDENING OF 45 STEEL[J].Corrosion Science and Protection Technology,2008,20(6):413-415. |
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| Authors: | QIU Xing-wu LI Gang REN Xin QIU Ling WANG Xiao-liang LIU Jing |
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| Affiliation: | Department of Materials Science and Engineering;Liaoning Technical University;Fuxin 123000 |
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| Abstract: | Laser hardening of 45 steel was carried out by an Axial-Flow CO2 laser processing machine.The microstructure and properties of laser hardened steel were investigated.The results showed that,from the surface to the substrate the microstructure changed as follows,the surface microstructure is plate martensite,and the subsurface is cryptocrystalline martensite,the transition zone contains mixed martensite,troostite and part of the nonmelting ferrite.Compared with the substrate,the hardness of the modified laye... |
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| Keywords: | laser hardening microstructure hardness corrosion resistance |
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