Pulsed current-assisted twelve-roll precision rolling deformation of SUS304 ultra-thin strips with exceptional mechanical properties  

作　　者：Wanwan Fan Tao Wang Jinxiong Hou Zhongkai Ren Qingxue Huang Guanghui Wu 

机构地区：[1]College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Yingze West Street 79,Taiyuan 030024,Shanxi Province,People's Republic of China [2]Engineering Research Center of Advanced Metal Composites Forming Technology and Equipment of Ministry of Education,Taiyuan University of Technology,Yingze West Street 79,Taiyuan 030024,Shanxi Province,People's Republic of China [3]National Key Laboratory of Metal Forming Technology and Heavy Equipment,Taiyuan University of Technology,Yingze West Street 79,Taiyuan 030024,Shanxi Province,People's Republic of China [4]College of Aeronautics and Astronautics,Taiyuan University of Technology,Yingze West Street 79,Taiyuan 030024,Shanxi Province,People's Republic of China

出　　处：《International Journal of Extreme Manufacturing》2024年第4期291-305,共15页极端制造（英文）

基　　金：This work was supported by the fund of the National Natural Science Foundation of China(51974196);Major Program of National Natural Science Foundation of China(U22A20188);Science and Technology Innovation Teams of Shanxi Province(202304051001025);Central Government Guides the Special Fund Projects of Local Scientific and Technological Development(YDZX20191400002149).

摘　　要：Innovative pulsed current-assisted multi-pass rolling tests were conducted on a 12-roll mill during the rolling deformation processing of SUS304 ultra-thin strips.The results show that in the first rolling pass,the rolling reduction rate of a conventionally rolled sample(at room temperature)is 33.8%,which can be increased to 41.5%by pulsed current-assisted rolling,enabling the formation of an ultra-thin strip with a size of 67.3μm in only one rolling pass.After three passes of pulsed current-assisted rolling,the thickness of the ultra-thin strip can be further reduced to 51.7μm.To clearly compare the effects of a pulsed current on the microstructure and mechanical response of the ultra-thin strip,ultra-thin strips with nearly the same thickness reduction were analyzed.It was found that pulsed current can reduce the degree of work-hardening of the rolled samples by promoting dislocation detachment,reducing the density of stacking faults,inhibiting martensitic phase transformation,and shortening the total length of grain boundaries.As a result,the ductility of ultra-thin strips can be effectively restored to approximately 16.3%while maintaining a high tensile strength of 1118 MPa.Therefore,pulsed current-assisted rolling deformation shows great potential for the formation of ultra-thin strips with a combination of high strength and ductility.

关 键 词：pulsedcurrent-assisted SUS304 ultra-thinstrip rolling reductionrate WORK-HARDENING mechanical properties 

分 类 号：TG335.56[金属学及工艺—金属压力加工]