超声表面滚压工艺影响镍基690合金冲-切磨损行为的研究  

Influence of Ultrasonic Surface Rolling on Impact-Shear Wear Behavior of Ni Base 690 Alloy

作　　者：尹美贵 张磊 尹海燕 YIN Meigui;ZHANG Lei;YIN Haiyan(College of Mechanical and Electrical Engineering,Wenzhou University,Zhejiang Wenzhou 325035,China)

机构地区：[1]温州大学机电工程学院,浙江温州325035

出　　处：《摩擦学学报（中英文）》2024年第7期985-995,共11页Tribology

基　　金：国家自然科学基金项目(52105201);浙江省自然科学基金项目(LQ22E050010);温州市基础性工业科技项目(2021G0003)资助。

摘　　要：通过超声表面滚压技术(USRP)改善镍基690合金表面的粗糙度和硬化层,并探究该工艺对其冲-切磨损行为的影响机理.首先,采用USRP对镍基690合金表面进行强化处理,然后,基于可控能量式冲-切磨损试验装置,探究镍基690合金强化前后在不同冲-切变量下其磨损界面的动态响应行为与损伤机理.得出了USRP工艺可有效降低磨损界面的摩擦力和摩擦系数,降低冲切能耗,进而减少材料的磨损程度,此外,冲击或切向滑动速度的增加均会导致磨损界面所受冲击力和摩擦力的增大,并降低动能吸收率.Ultrasonic surface rolling process(USRP)was applied to improve the surface roughness and microhardness of Inconel 690 alloy.Moreover,the effect of this process on the impact-sliding wear behavior of Inconel 690 alloy was investigated.First,Inconel 690 alloy was selected as the test material,and the size specifications of the specimen were10 mm×10 mm×5 mm cuboids.The chemical composition of Inconel 690 alloy was Ni 59.48%,Cr 29.5%,Al 0.36%,C0.022%,Si 0.38%,Mn 0.42%,P 0.012%and S 0.025%.Before ultrasonic surface rolling,different specifications(800,1000,1200 and 1500 Cw)of silicon nitride sandpaper were used sequentially to polish the required reinforced surface,and then 0.5μm diamond grinding paste was used to polish the polished surface until the mirror surface;then absolute ethanol was used to wash in an ultrasonic cleaner for 15 minutes,and finally the sample surface was dried with compressed air.the Inconel 690 alloy's surface was treated using USRP under specific process parameters.Second,on the basis of an energy control impact-sliding wear test rig,the impact block hit the specimen in motion at a set initial speed(v_i)in the impact direction.Among them,the mass(m)of the normal impact block was 800 g,and the total number of punching cycles(n)per test was 10000.Immediately afterwards,an optical microscope was used to observe the shape and morphology of the resulting wear marks.The alloy's surface dynamic mechanical response behavior and damage mechanism were examined under different impact or sliding velocities.The rebound velocity of Inconel 690alloy under the same test conditions was significantly improved due to the refinement of the surface grain,smoother surface,and reduced tangential friction during punching and shearing wear,and the maximum increase of rebound speed was 30.9%,which occurred when the impact velocity was 30 mm/s.At an impact velocity of 30 mm/s and a tangential velocity of 60 mm/s,the friction coefficients of the untreated specimen and the USRP-treated specimen were approximately 0.23

关 键 词：镍基690合金 超声表面滚压 冲-切磨损 损伤机理 

分 类 号：TH117.2[机械工程—机械设计及理论]