| AZ31B镁合金表面激光熔覆Cu-Ni合金层 |
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| 引用本文： | 崔泽琴,吴宏亮,王文先,许并社.AZ31B镁合金表面激光熔覆Cu-Ni合金层[J].中国有色金属学报,2010,20(9). |
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| 作者姓名： | 崔泽琴 吴宏亮 王文先 许并社 |
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| 作者单位： | 1. 太原理工大学,材料科学与工程学院,太原,030024;太原理工大学,新材料界面科学与工程教育部重点实验室,太原,030024
2. 太原理工大学,材料科学与工程学院,太原,030024 |
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| 基金项目： | 山西省自然科学基金资助项目 |
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| 摘 要： | 针对镁合金表面耐磨性和耐蚀性差的问题,利用横流CO2激光器在AZ31B镁合金表面激光熔覆Cu-Ni合金层,并利用光学显微镜(OM)、扫描电镜(SEM)和能谱分析仪(EDS)分析熔覆层与基体的结合界面特征以及显微组织和成分分布情况,测试合金层的显微硬度和耐蚀性。结果表明:合金层与基体结合良好,缺陷较少,但局部存在不均匀的Cu-Ni富集区,且在其边缘区域的枝晶间均匀分布着1~1.5μm的十字状Laves相;合金层的硬度分布比较均匀,约为75HV0.05,明显高于基体的显微硬度45HV0.05;Cu-Ni合金层比AZ31B镁合金基体的腐蚀电位正移317mV,腐蚀电流降低78mA/cm2,耐蚀性也得到较大改善。
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| 关 键 词： | AZ31B镁合金 Cu-Ni合金层 激光熔覆 耐磨性 耐蚀性 |
Laser cladding Cu-Ni alloy layer on AZ31B magnesium alloy |
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| CUI Ze-qin,WU Hong-liang,WANG Wen-xian,XU Bing-she.Laser cladding Cu-Ni alloy layer on AZ31B magnesium alloy[J].The Chinese Journal of Nonferrous Metals,2010,20(9). |
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| Authors: | CUI Ze-qin WU Hong-liang WANG Wen-xian XU Bing-she |
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| Affiliation: | CUI Ze-qin1,2,WU Hong-liang1,WANG Wen-xian1,XU Bing-she1,2(1.College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China,2.Key Laboratory of Interface Science and Engineering in Advanced Materials of Ministry of Education,China) |
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| Abstract: | To improve the wear resistance and corrosion resistance of the surface of magnesium alloy,the laser alloying experiment was carried out on the AZ31B magnesium alloy with pre-placed Cu-Ni powder using transverse flow CO2 laser.The microstructures,interface features and composition distribution of laser cladding layer were studied through OM,SEM and EDS.The results show that the Cu-Ni cladding layer and the substrate achieve a good metallurgical bonding without obvious defects.But there is uneven local Cu-Ni-... |
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| Keywords: | AZ31B magnesium alloy Cu-Ni alloy layer laser cladding wear resistance corrosion resistance |
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