| 激光熔覆Ni60A W工艺与组织特征研究 |
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| 引用本文： | 王毛球,曾大文,宋武林,谢长生.激光熔覆Ni60A W工艺与组织特征研究[J].应用激光,1998(2). |
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| 作者姓名： | 王毛球 曾大文 宋武林 谢长生 |
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| 作者单位： | 华中理工大学材料系!武汉，430074，华中理工大学材料系!武汉，430074，华中理工大学材料系!武汉，430074，华中理工大学材料系!武汉，430074 |
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| 基金项目： | 国家自然科学基金!9581004 |
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| 摘 要： | 利用2kW的CO2激光在A3钢表面熔覆Ni60A＋W混合粉末，获得外观质量良好的熔覆层。对熔覆层的组织观察和成分分析结果表明：W颗粒米发生溶解和熔化，并且为Ni60A中碳化物的形核和生长提供条件；当W含量较低时，W颗粒在熔覆层中分布均匀；而W的含量较高时，大的W颗粒向熔覆层底部聚集。加入的金属W颗粒的重量含量为10％时，所需比能较小。
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| 关 键 词： | 激光熔覆 Ni基合金 金属W 工艺 组织特征 |
Study on Process and Microstructural Characteristicsof Laser-cladded Ni60A W Coatings |
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| Wang Maoqiu, Zeng Dawen, Song Wulin, Xie Changsheng.Study on Process and Microstructural Characteristicsof Laser-cladded Ni60A W Coatings[J].Applied Laser,1998(2). |
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| Authors: | Wang Maoqiu Zeng Dawen Song Wulin Xie Changsheng |
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| Abstract: | Clad of Ni60A W composites has been produced on A3 mild steel substrate witha 2kW CO2 laser. Perfect clad is obtained when the content of W in the powder is 10% in weightwith low specific energy. The results of microstructural observation and chemical analysis showthat tungsten particles have not dissovled or melted during laser cladding procedure, and theseparticles faciliate the nucleation and growth of carbide. The W particles evenly distribute in theclad when W content is low,but big particles are found to locate in the bottom reglon while thereare more W particles in the clad. |
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| Keywords: | laser cladding Nickel-based alloy tungsten process microstructure |
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