煤油中电火花沉积钛合金表面改性层性能研究  

Research on Properties of Surface Modified Layer of Titanium Alloy by Electrospark Deposition in Kerosene

作　　者：徐召朋 鲍曼雨[1,2] 马小斌[1,2] 汪瑞军 XU Zhaopeng;BAO Manyu;MA Xiaobin;WANG Ruijun(Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China;Beijing Golden Wheel Special Machine Co., Ltd., Beijing 100083, China)

机构地区：[1]中国农业机械化科学研究院,北京100083 [2]北京金轮坤天特种机械有限公司,北京100083

出　　处：《新技术新工艺》2019年第10期61-64,共4页New Technology & New Process

摘　　要：分别在氩气、煤油保护下,在TA32钛合金表面制备电火花沉积改性层,并对改性层的厚度、硬度和残余应力等进行测试分析。结果表明,氩气保护下制备改性层最大厚度为37.7μm,煤油保护下制备改性层最大厚度为98μm;煤油保护下制备改性层最高硬度值可达502.06HV0.2,氩气保护下制备改性层最高硬度值可达518.33HV0.2;氩气保护下制备改性层的残余应力为拉应力,最外侧的残余应力达到133MPa,而煤油保护下制备改性层的残余应力为压应力,最外侧的残余应力达到-91.2 MPa。通过在煤油保护下制备改性层,实现了残余应力从拉应力向压应力的转变,为钛合金在航空航天、军事等领域的应用提供了一定的理论依据。Under the protection of argon and kerosene, the ESD layer was prepared on the surface of TA32 titanium alloy, and the thickness, hardness and residual stress of the modified layer were tested. The results showed that the maximum thickness of the modified layer prepared under argon protection was 37.7 μm, and the maximum thickness of the modified layer prepared under kerosene protection was 98 μm. The highest value of the modified layer prepared under kerosene protection can reach to 502.06 HV 0.2 , and the preparation was modified under argon gas protection. The highest value of the layer can reach 518.33 HV 0.2 , the residual stress of the modified layer prepared under argon protection was tensile stress, and the residual stress at the outermost side reached to 133 MPa, while the residual stress of the modified layer prepared under kerosene protection was compressive stress. The residual stress on the outside reached to -91.2 MPa. By preparing the modified layer under the protection of kerosene, the tensile-pressure transition of residual stress was realized, which provided a theoretical basis for the application of titanium alloy in aerospace, military and other fields.

关 键 词：煤油保护 电火花沉积 钛合金 改性层 硬度 残余应力 

分 类 号：TG174[金属学及工艺—金属表面处理]