| 激光熔覆多元复合硬质合金的覆层结构研究 |
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| 引用本文： | 郑启光,童杏林,胡兵.激光熔覆多元复合硬质合金的覆层结构研究[J].中国机械工程,2004,15(1):83-85. |
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| 作者姓名： | 郑启光 童杏林 胡兵 |
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| 作者单位： | 华中科技大学激光技术国家重点实验室,武汉,430074 |
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| 基金项目： | 国家自然科学基金资助项目 (50 2 710 2 8) |
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| 摘 要： | 采用激光熔覆的方法在55Si2Mn弹簧钢表面制备了Co基WC—TiC—TaC多元复合熔覆层，用扫描电镜(SEM)和电子探针分析了呈波纹表面的激光熔覆层的组织特性，发现由于各硬质合金物性的差别，熔覆区中出现亚-层结构，研究表明熔覆区中的亚层结构是形成熔覆层中裂纹缺陷的主要原因。提出了通过电磁搅拌控制硬质相在熔覆层中分布，以提高熔覆涂层质量的理论构想。
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| 关 键 词： | 激光熔覆 硬质合金 亚层结构 裂纹 电磁搅拌 |
| 文章编号： | 1004-132X(2004)01-0083-03 |
Structural Analysis for Laser Cladding of WC-TiC-TaC/Co Based Carbide |
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| Zheng Qiguang Tong Xinglin Hu Bing Ding Zhouhua Xi Zaijun Qin Yingxiong Huazhong University of Science and Technology,Wuhan.Structural Analysis for Laser Cladding of WC-TiC-TaC/Co Based Carbide[J].China Mechanical Engineering,2004,15(1):83-85. |
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| Authors: | Zheng Qiguang Tong Xinglin Hu Bing Ding Zhouhua Xi Zaijun Qin Yingxiong Huazhong University of Science and Technology Wuhan |
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| Affiliation: | Zheng Qiguang Tong Xinglin Hu Bing Ding Zhouhua Xi Zaijun Qin Yingxiong Huazhong University of Science and Technology,Wuhan,430074 |
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| Abstract: | Investigation on laser cladding of WC-TiC-TaC/Co based carbide on 55Si2Mn spring steel had been done. The properties of laser cladding layer had been analyzed by SEM and EPA. It is found that the cladding region of laser cladding layer consists of two sublayers, which is related to the physical properties of the cladding material. It shows the cracks in the laser cladding coating are mainly related to the sublayers structure. In order to enhance the quality of laser cladding layer the electromagnetic stirring method was put forward to make carbide particle phases distributed relatively uniformly in laser cladding layer. |
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| Keywords: | laser cladding carbide sublayer structure crack electromagnetic stirring |
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