| 引用本文: | 许磊, 杜彦斌, 张磊.表面损伤叶轮激光增材再制造研究(J/M/D/N,J:杂志，M：书，D：论文，N：报纸).期刊名称,2021，38（1）：1-6 |
| CHEN X. Adap tive slidingmode contr ol for discrete2ti me multi2inputmulti2 out put systems[ J ]. Aut omatica, 2006, 42(6): 4272-435 |
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| 摘要: |
| 为了实现表面损伤叶轮的再制造，提出了叶轮激光熔覆增材再制造流程，并利用激光熔覆技术在叶轮材料试样表面进行Fe基粉末熔覆实验；叶轮再制造流程主要包括设备拆解、清洗、检测、再制造加工、零件测试、装配、喷涂包装等；激光熔覆实验表明粉末与基体产生了良好的冶金结合，组织致密且无未熔化粉末颗粒，熔覆层硬度达到625.7 HV，约为基体材料硬度的1.57倍，屈服强度为641 MPa；激光熔覆再制造叶轮经着色探伤检测和工业CT检测等显示再制造熔覆区域无裂纹、气孔等质量问题，采用去重式平衡，动不平衡量小于标准值750 g.mm，叶轮安装调试一次成功，各项指标满足要求。 |
| 关键词: 激光增材 泵叶轮 冶金结合 显微硬度 |
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| Laser Cladding Remanufacture on Damaged Impeller Surface |
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XU Lei, DU Yan-bin,ZHANG Lei1,2
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1.Chongqing Key Laboratory of Design and Control of Manufacturing Equipment Mechanism, Chongqing Technology and Business University, Chongqing 400067, China;2.Chongqing Pump Industry CO.,LTD, Chongqing 400003, China
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| Abstract: |
| In order to realize the remanufacturing of impellers with surface damage, remanufactureing process and method were put forward,and Fe based powder was melted on the surface by laser cladding technology.The remanufacturing process of impeller mainly includes equipment disassembly, cleaning, testing, remanufacturing, parts testing, assembly, packaging, etc.The laser cladding experiment shows that the powder has a good metallurgical bonding with the matrix, the microstructure is compact and there is no unmelted powder particles.The hardness of the cladding layer is 625.7HV, about 1.57 times of the hardness of the matrix material, and the yield strength is 641 MPa.The laser cladding remanufactured impeller has been tested by dye detection and industrial CT to show that there are no cracks, holes and other quality problems in the remanufactured cladding area; the weight removal balance is adopted, and the dynamic unbalance is less than the standard value of 750 g.mm; the impeller is once installed and debugged successfully and the index meets the requirements. |
| Key words: laser additive manufacturing pump impeller metallurgical bonding microhardness. |
