| 送粉激光堆焊梯度功能材料 |
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| 引用本文： | 宋建丽,葛志军,邓琦林,胡德金.送粉激光堆焊梯度功能材料[J].焊接学报,2006,27(2):27-30. |
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| 作者姓名： | 宋建丽 葛志军 邓琦林 胡德金 |
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| 作者单位： | 1. 上海交通大学,机械与动力工程学院,上海,200030;太原科技大学,材料科学与工程分院,太原,030024
2. 上海交通大学,机械与动力工程学院,上海,200030 |
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| 摘 要： | 采用同步送粉的方法进行了316L不锈钢和铁基合金粉末的激光堆焊.通过显微组织观察、SEM电镜扫描、拉伸试验、磨损试验和EDAX能谱分析等手段对激光堆焊层组织性能以及成分进行了分析和测试.两种堆焊材料的梯度功能组合使得不同堆焊部位可以满足不同的工艺和性能要求.激光堆焊层和基体呈冶金结合、稀释率小,堆焊组织细小、致密、无裂纹、气孔等缺陷,底层试样抗拉强度和伸长率达到752.4MPa和41.05%,表层材料磨损性能大大超过基体材料.送粉激光堆焊可以实现材料与性能的优化匹配,为金属零件的梯度功能修复和复杂零件的成形提供了一条有效途径.
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| 关 键 词： | 激光堆焊 梯度功能 组织性能 修复 |
| 文章编号： | 0253-360X（2006）02-27-04 |
| 收稿时间： | 2005-01-25 |
| 修稿时间： | 2005-01-25 |
Laser deposited welding of functional gradient materials with powder feeding |
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| SONG Jian-li,GE Zhi-jun,DENG Qi-lin and HU De-jin.Laser deposited welding of functional gradient materials with powder feeding[J].Transactions of The China Welding Institution,2006,27(2):27-30. |
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| Authors: | SONG Jian-li GE Zhi-jun DENG Qi-lin and HU De-jin |
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| Affiliation: | School of Mechanical and Power Engineering, Shanghai Jiaotong University, Shanghai 200030, China;School of Materials Science and Engineering, Taiyuan University of Science & Technology, Taiyuan 030024, China,School of Mechanical and Power Engineering, Shanghai Jiaotong University, Shanghai 200030, China,School of Mechanical and Power Engineering, Shanghai Jiaotong University, Shanghai 200030, China and School of Mechanical and Power Engineering, Shanghai Jiaotong University, Shanghai 200030, China |
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| Abstract: | Laser deposited welding of stainless steel and iron-based alloy was carried out with synchronized powder feeding method.The microstructure,properties and composition of the deposited layer were thoroughly analyzed and tested by means of microstructural observation,SEM scanning,tensile strength testing,wearing and EDAX analysis.Different process and property requirements at different deposited position can be satisfied with functionally gradient combination of different welding materials.The deposited welding layer presents a metallurgical bonding with the substrate,and the dilution is quite small.The microstructure obtained is fine,compact,and free of cracking and porosity.The tensile strength of the samples at the bottom of the deposited layers reaches 752.4MPa,and the elongation 41.05%.The wearing resistance of the surface layer has greatly surpassed that of the substrate.The optimized matching of materials and properties can be realized by laser deposited welding with powder feeding,which provides an effective way for the forming and functional gradient repairing of metal components. |
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| Keywords: | laser deposited welding functional gradient microstructure and properties repairing |
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