| 直接堆粉预置涂层的激光熔覆显微组织研究 |
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| 引用本文： | 李伟翔,张光钧.直接堆粉预置涂层的激光熔覆显微组织研究[J].机械制造,2009,47(10):48-50. |
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| 作者姓名： | 李伟翔 张光钧 |
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| 作者单位： | 上海工程技术大学,材料工程学院激光工业技术研究所,上海,201620 |
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| 基金项目： | 上海市教委重点学科资助项目，上海工程技术大学研究生创新项目 |
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| 摘 要： | 在铁基材料表面采用直接堆粉预置涂层方法制备激光熔覆层，得到了消除裂纹和孔洞的熔覆层。其显微组织主要由Fe—Ni合金、WC及Fe23（C，B）6所组成，且碳化物分布较均匀。熔覆层的显微硬度相对基体有显著提高，保留了有利于提高熔覆层性能的纳米颗粒。证明用该方法制备激光熔覆层是可行的。
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| 关 键 词： | 激光熔覆 直接堆粉 显微组织 显微硬度 |
Research on Microstructure of Laser Cladding with Direct Pre-placed Powder Coatings |
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| Li Weixiang,Zhang Guangjun.Research on Microstructure of Laser Cladding with Direct Pre-placed Powder Coatings[J].Machinery,2009,47(10):48-50. |
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| Authors: | Li Weixiang Zhang Guangjun |
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| Abstract: | The direct pre-placed powder coating method is adopted to prepare the laser cladding layer on the surlace ot terrous materials, thus obtaining a crack- and pore-free cladding coating. The microstrueture of the coating layer mainly consists of Fe-Ni alloy, WC and Fe23（C, B）6 and the carbide is distributed uniformly. The mierohardness of the layer is improved more greatly than that of the substance. The nano grains favorable for the properties of the coating are deposited. It is proven that the method is practicable in preparation of laser clad coating. |
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| Keywords: | Laser Cladding Direct Pre-placed Powder Microstructure Microhardness |
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