| 不锈钢表面激光合金化Mn-Al2O3强化层的组织及性能 |
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| 引用本文： | 李鹏,孙桂芳,张尉,刘卫祥,张永康,张满奎.不锈钢表面激光合金化Mn-Al2O3强化层的组织及性能[J].中国有色金属学报,2012(8):2253-2259. |
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| 作者姓名： | 李鹏 孙桂芳 张尉 刘卫祥 张永康 张满奎 |
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| 作者单位： | 江苏大学机械工程学院;江苏联冠科技发展有限公司;东南大学机械工程学院 |
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| 基金项目： | 中国博士后科学基金资助项目(20100471383);中国博士后科学基金特别资助项目(201104513);国家教育部博士点专项基金资助(20113227120006);江苏大学高级专业人才科研启动基金资助项目(10JDG048) |
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| 摘 要： | 基于高速混合机桨叶所用奥氏体不锈钢的失效情况,利用激光合金化技术在奥氏体不锈钢上制备合金化强化耐磨层。利用光学显微镜、扫描电镜、X射线衍射仪、显微硬度计和光学分析仪研究合金化层的显微组织、成分、物相、横截面的硬度分布,同时利用正交试验得到激光合金化技术的优化参数。结果表明:当硬质相Al2O3的含量为70%,激光功率为2 kW,扫描速度为15 mm/s时,合金化层的显微硬度最大,达到440.8 HV0.1;所制备的合金化层无裂纹和气孔等缺陷,与基体形成冶金结合;合金化层由枝晶和枝晶间共晶组成,其相组成为奥氏体、Al2O3、Cr7C3、Mn7C3和Mn2O3;合金化层的耐磨损性能较基体的显著提高。
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| 关 键 词： | 桨叶 激光合金化 不锈钢 磨损 |
Microstructure and properties of laser alloyed Mn-Al2O3 layer on stainless steel |
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| LI Peng,SUN Gui-fang,ZHANG Wei,LIU Wei-xiang,ZHANG Yong-kang,ZHANG Man-kui.Microstructure and properties of laser alloyed Mn-Al2O3 layer on stainless steel[J].The Chinese Journal of Nonferrous Metals,2012(8):2253-2259. |
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| Authors: | LI Peng SUN Gui-fang ZHANG Wei LIU Wei-xiang ZHANG Yong-kang ZHANG Man-kui |
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| Affiliation: | 1 (1.School of Mechanical Engineering,Jiangsu University,Zhenjiang 212013,China; 2.Jiangsu Lianguan Science and Technology Development Co.,Ltd,Zhangjiagang 215624,China; 3.School of Mechanical Engineering,Southeast University,Nanjing 210000,China) |
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| Abstract: | Based on the failure of austenitic stainless steel used in high-speed mixing blades,the laser alloying technique was used to fabricate the alloyed layer on stainless steel.The microstructure,composition,phases,microhardness of the cross-section of the alloyed layer were analyzed by OM,SEM,XRD,microhardness tester,optical profiling system,and the optimal parameter is obtained by the use of orthogonal.The results indicate that,the highest hardness is 440.8 HV0.1 when the content of Al2O3,the laser power and laser scanning speed are 70%,2 kW and 15 mm/s,respectively.The alloyed layer is free of cracks with good processability,the alloyed layer is composed of dendrites and eutectic,the phases are austenite,Al2O3,Cr7C3,Mn7C3 and Mn2O3.The wear resistance of alloyed layer increases significantly. |
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| Keywords: | blade laser alloying stainless steel wear |
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