【摘要】：利用激光熔覆技術(shù),在6063Al表面制備了添加有La2O3、Y2O3、Ce O2的Ni60合金熔覆層,并通過SEM、XRD、顯微硬度計(jì)和摩擦磨損試驗(yàn)機(jī)等設(shè)備的測試分析,研究稀土氧化物對(duì)6063Al表面Ni基激光熔覆層組織結(jié)構(gòu)、硬度及摩擦磨損性能的影響.結(jié)果表明:不同成分熔覆層的主要相結(jié)構(gòu)均為β-Ni Al(Cr)和少量的Al3Ni、Al Ni3和Al等,但La2O3+Ni60熔覆層中含稀土化合物Al4La,Y2O3+Ni60熔覆層中出現(xiàn)了YAl3、Al Ni Y和Ni17Y2,Ce O2+Ni60熔覆層中檢測到了Ce Ni5和Ce3Ni6Si2;添加不同稀土氧化物的Ni60熔覆層呈現(xiàn)細(xì)密的、均勻分布的枝晶,無明顯氣孔,其晶粒較不含稀土的Ni60熔覆層明顯細(xì)化;加入稀土氧化物的Ni60熔覆層硬度提高HV100~300,且隨著深度的增加,硬度值比未加稀土的Ni60熔覆層過渡較平緩;和Ni60熔覆層相比,添加稀土氧化物L(fēng)a2O3、Y2O3和Ce O2的Ni60熔覆層磨損面崩損程度減小了,具有較平整的表面磨痕形貌,磨痕深度和寬度均大幅減小,磨損量減少了一個(gè)數(shù)量級(jí),摩擦系數(shù)也較低,其中加入La2O3和Ce O2的熔覆層磨損量最低,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.
【作者單位】： 桂林電子科技大學(xué)材料科學(xué)與工程學(xué)院;
【基金】：國家自然科學(xué)基金項(xiàng)目(51201043,51264007)資助~~
【分類號(hào)】：TG174.4

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相關(guān)期刊論文 前10條

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本文編號(hào)：2313789