| 不锈钢基体激光熔覆Ni60A的残余应力研究 |
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| 引用本文： | 许明三,戴腾运,江吉彬,陈昌荣,曾寿金.不锈钢基体激光熔覆Ni60A的残余应力研究[J].福建工程学院学报,2016,0(6):557-562. |
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| 作者姓名： | 许明三 戴腾运 江吉彬 陈昌荣 曾寿金 |
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| 作者单位： | 福建工程学院 机械与汽车工程学院 |
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| 摘 要： | 选择激光功率、扫描速度、送粉量为影响因素，用正交试验方法研究了不锈钢基体激光熔覆Ni60A的残余应力；结果表明:影响残余应力的关键因素为扫描速度，其次是激光功率，最后为送粉量；扫描速度180 mm/min、激光功率1.5 kW、送粉量3 g/s产生最小残余应力；此时熔覆材料Ni60A与基体形成良好的冶金结合，熔覆层组织均匀，无微裂纹等明显缺陷。研究结果为叶轮和螺杆的激光熔覆再制造提供了实验依据。
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| 关 键 词： | 激光熔覆 残余应力 显微组织 显微硬度 不锈钢 |
Research of residual stress in laser cladding of Ni60A on stainless steel |
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| Xu Mingsan,Dai Tengyun,Jiang Jibin,Chen Cangrong,Zeng Shoujin.Research of residual stress in laser cladding of Ni60A on stainless steel[J].Journal of Fujian University of Technology,2016,0(6):557-562. |
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| Authors: | Xu Mingsan Dai Tengyun Jiang Jibin Chen Cangrong Zeng Shoujin |
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| Institution: | College of Mechanical and Automotive Engineering, Fujian University of Technology |
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| Abstract: | The effects of laser power, scanning speed and powder feed rate on the residual stress of laser cladding Ni60A on stainless steel substrate were investigated via orthogonal experiments. The experimental results show that the most significant parameter affecting the residual stress is scanning speed, followed by the laser power and feed rate. When the scanning speed is 180mm/min, the laser power is 1.5kW and the powder feeding rate is 3g/s, the residual stress is the minimum. Under the optimal condition, a favourable metallurgical bonding forms between the substrate and cladding powder with a uniform cladding layer of crystal microstructure without minor defection. The results can provide an empirical basis for laser cladding of impellers and screws. |
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| Keywords: | laser cladding residual stress microstructure micro-hardness stainless steel |
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