稀土对6063Al镍基激光熔覆层组织及摩擦磨损性能的影响
发布时间：2018-11-06 08:45
【摘要】：利用激光熔覆技术,在6063Al表面制备了添加有La2O3、Y2O3、Ce O2的Ni60合金熔覆层,并通过SEM、XRD、显微硬度计和摩擦磨损试验机等设备的测试分析,研究稀土氧化物对6063Al表面Ni基激光熔覆层组织结构、硬度及摩擦磨损性能的影响.结果表明:不同成分熔覆层的主要相结构均为β-Ni Al(Cr)和少量的Al3Ni、Al Ni3和Al等,但La2O3+Ni60熔覆层中含稀土化合物Al4La,Y2O3+Ni60熔覆层中出现了YAl3、Al Ni Y和Ni17Y2,Ce O2+Ni60熔覆层中检测到了Ce Ni5和Ce3Ni6Si2;添加不同稀土氧化物的Ni60熔覆层呈现细密的、均匀分布的枝晶,无明显气孔,其晶粒较不含稀土的Ni60熔覆层明显细化;加入稀土氧化物的Ni60熔覆层硬度提高HV100~300,且随着深度的增加,硬度值比未加稀土的Ni60熔覆层过渡较平缓;和Ni60熔覆层相比,添加稀土氧化物La2O3、Y2O3和Ce O2的Ni60熔覆层磨损面崩损程度减小了,具有较平整的表面磨痕形貌,磨痕深度和宽度均大幅减小,磨损量减少了一个数量级,摩擦系数也较低,其中加入La2O3和Ce O2的熔覆层磨损量最低,耐磨性最好.
[Abstract]:Using laser cladding technology, the Ni60 alloy cladding layer with La2O3,Y2O3,Ce O2 was prepared on the surface of 6063Al, and the SEM,XRD, microhardness tester and friction and wear tester were used to test and analyze the coating. The effects of rare earth oxides on the microstructure, hardness and friction and wear properties of Ni based laser cladding on 6063Al surface were investigated. The results show that the main phase structures of different composition cladding coatings are 尾-Ni Al (Cr) and a small amount of Al3Ni,Al Ni3 and Al, but YAl3,Al Ni Y and Ni17Y2, appear in the Al4La,Y2O3 Ni60 cladding layer containing rare earth compounds in La2O3 Ni60 cladding. Ce Ni5 and Ce3Ni6Si2; were detected in Ce O2 Ni60 cladding The Ni60 cladding layer with different rare earth oxides showed fine and uniform dendrite, no obvious porosity, and its grain size was more fine than that of Ni60 cladding coating without rare earth. The hardness of Ni60 cladding layer increased with the increase of depth, and the transition of Ni60 cladding layer without rare earth oxide was slower than that of Ni60 cladding layer without rare earth. Compared with Ni60 cladding layer, the wear surface of Ni60 cladding layer with rare earth oxide La2O3,Y2O3 and Ce O2 decreased, and the wear surface of Ni60 cladding coating was smooth, the wear depth and width were decreased greatly, and the wear amount was reduced by one order of magnitude. The friction coefficient is also low, and the wear resistance of the cladding layer with La2O3 and Ce O _ 2 is the lowest and the wear resistance is the best.
【作者单位】： 桂林电子科技大学材料科学与工程学院;
【基金】：国家自然科学基金项目(51201043,51264007)资助~~
【分类号】：TG174.4
[Abstract]:Using laser cladding technology, the Ni60 alloy cladding layer with La2O3,Y2O3,Ce O2 was prepared on the surface of 6063Al, and the SEM,XRD, microhardness tester and friction and wear tester were used to test and analyze the coating. The effects of rare earth oxides on the microstructure, hardness and friction and wear properties of Ni based laser cladding on 6063Al surface were investigated. The results show that the main phase structures of different composition cladding coatings are 尾-Ni Al (Cr) and a small amount of Al3Ni,Al Ni3 and Al, but YAl3,Al Ni Y and Ni17Y2, appear in the Al4La,Y2O3 Ni60 cladding layer containing rare earth compounds in La2O3 Ni60 cladding. Ce Ni5 and Ce3Ni6Si2; were detected in Ce O2 Ni60 cladding The Ni60 cladding layer with different rare earth oxides showed fine and uniform dendrite, no obvious porosity, and its grain size was more fine than that of Ni60 cladding coating without rare earth. The hardness of Ni60 cladding layer increased with the increase of depth, and the transition of Ni60 cladding layer without rare earth oxide was slower than that of Ni60 cladding layer without rare earth. Compared with Ni60 cladding layer, the wear surface of Ni60 cladding layer with rare earth oxide La2O3,Y2O3 and Ce O2 decreased, and the wear surface of Ni60 cladding coating was smooth, the wear depth and width were decreased greatly, and the wear amount was reduced by one order of magnitude. The friction coefficient is also low, and the wear resistance of the cladding layer with La2O3 and Ce O _ 2 is the lowest and the wear resistance is the best.
【作者单位】： 桂林电子科技大学材料科学与工程学院;
【基金】：国家自然科学基金项目(51201043,51264007)资助~~
【分类号】：TG174.4
【参考文献】
相关期刊论文 前10条
1 汪新衡;匡建新;何鹤林;朱航生;;CeO_2对镍基金属陶瓷激光熔覆层组织和耐磨蚀性能的影响[J];材料保护;2009年02期
2 张春华,张松,文R怪，
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