La_2O_3对镍基自熔合金熔覆涂层耐磨性的影响  

Effect of La_2O_3 on Abrasiveness of Nickel-based Self-melting Alloy Cladding Coating

作　　者：霍文燚 时海芳[1] 任鑫[1] 

机构地区：[1]辽宁工程技术大学材料科学与工程学院,辽宁阜新123000

出　　处：《热加工工艺》2015年第6期112-114,118,共4页Hot Working Technology

摘　　要：通过在G111镍基自熔合金粉末中加入La2O3,利用氧-乙炔火焰喷涂工艺在Q235基体上制备熔覆涂层以提高其耐磨性。实验结果表明:添加适量的La2O3可细化熔覆涂层组织,提高熔覆涂层硬度和耐磨性,改善熔覆涂层和基体的结合状态。在一定范围内,熔覆涂层的表面硬度和耐磨性随La2O3含量的增多而显著提升,但其并不呈线性关系。当La2O3含量达到G111镍基自熔合金质量的0.6%时,熔覆涂层表面硬度和耐磨性均最佳,超过0.6%后,硬度和耐磨性反而会变差。By adding La2O3 to the G111 nickel-based self-melting alloy powder,the abrasiveness of cladding coatings on Q235 steel substrate was improved by oxygen-acetylene flame cladding process.The results show that the reasonable adding of La2O3 can refine the microstructure,increase hardness and abrasiveness of cladding coatings,and improve the bonding state of cladding coatings with substrate.Within a certain range,the hardness and abrasiveness of cladding coatings’ surface are improved obviously with the increase in the adding dosage of La2O3,but there is not a linear relation.When the adding dosage of La2O3 is 0.6% of the total alloy powder quality,the hardness and abrasiveness of the cladding coatings are the best.When it’s more than 0.6%,however,the hardness and abrasiveness of cladding coatings become worse.

关 键 词：LA2O3 熔覆涂层 镍基合金 耐磨性 

分 类 号：TG174.4[金属学及工艺—金属表面处理] TG178[金属学及工艺—金属学]