Sc元素对Ag-Ni合金力学性能与抗硫化性能的影响  

Effect of Sc Element on the Mechanical Properties and Sulfurization Resistance of Ag-Ni Alloy

作　　者：金斌俊 刘奎仁 倪帅 王春新 孙宏志 韩庆 陈建设 李斌川 JIN Bin-jun;LIU Kui-ren;NI Shuai;WANG Chun-xin;SUN Hong-zhi;HAN Qing;CHEN Jian-she;LI Bin-chuan(School of Metallurgy,Northeastern University,Shenyang 110819,China;Shenyang Key Laboratory of Nonferrous Metal Resource Recycling,Shenyang 110819,China;Liaoning Xindu Gold Co.,Ltd.,Chaoyang 122000,China)

机构地区：[1]东北大学冶金学院,辽宁沈阳110819 [2]沈阳市有色金属资源循环利用重点实验室,辽宁沈阳110819 [3]辽宁新都黄金有限责任公司,辽宁朝阳122000

出　　处：《稀有金属与硬质合金》2023年第6期53-58,77,共7页Rare Metals and Cemented Carbides

基　　金：国家自然科学基金项目(2019YFC1907505)。

摘　　要：采用真空感应熔炼炉制备Ag-Ni-Sc系列合金。采用浸泡腐蚀、电化学测试研究了系列合金在0.1mol/L的Na_(2)S溶液和H_(2)S气氛中的腐蚀行为,采用SEM、EDS、OM及硬度测试研究了Sc含量对Ag-Ni合金的腐蚀形貌、腐蚀产物组分、显微结构及力学性能的影响。结果表明,适量添加Sc元素可以降低合金的腐蚀电流,提高合金的抗硫化性能,细化合金晶粒,提升合金的硬度。过量的Sc会导致合金组织中出现过多金属间化合物、晶界偏析,从而使得合金硬度和抗硫化性能变差。综合考虑,Sc元素在Ag-Ni合金中的最优添加量为0.15%。Ag-Ni-Sc series alloys were prepared by vacuum induction smelting furnace.The corrosion beha-vior of these series of alloys in 0.1 mol/L Na_(2)S solution and H_(2)S atmosphere was studied by immersion corrosion and electrochemical tests.And the effects of Sc addition on the corrosion morphology,components of the corrosion products,microstructure,and mechanical properties of Ag-Ni alloys were investigated by SEM,EDS,OM,and hardness tests.The results show that the moderate addition of Sc can reduce the corrosion current of the alloy,improve the sulfuration resistance of the alloy,refine the grains of the alloy,and thus enhance the hardness of the alloy.However,excessive Sc content will lead to excess amount of intermetallic compounds and grain boundary segregation in the alloy microstructure,deteriorating the hardness and sulfuration resistance of the alloy.Taking all factors into consideration,the optimum addition of Sc in Ag-Ni alloys is 0.15%.

关 键 词：SC Ag-Ni合金 腐蚀形貌 力学性能 抗硫化性能 电化学腐蚀性能 

分 类 号：TG146.32[一般工业技术—材料科学与工程]