冷轧0.10C5Mn2Al钢在10^-2/s应变速率下的超塑性研究  

A Study on Superplasticity of Cold Rolling 0.10C5Mn2Al Steel at Strain Rate 10^-2/s

作　　者：刘思涵 王存宇[1] 王昌[1] 徐海峰[1] 曹文全[1] Liu Sihan;Wang Cunyu;Wang Chang;Xu Haifeng;Cao Wenquan(Institute for Special Steels,Central Iron and Steel Research Institute,Bejjing 100081)

机构地区：[1]钢铁研究总院,北京100081

出　　处：《特殊钢》2020年第5期55-59,共5页Special Steel

基　　金：国家自然科学基金资助(51871062)

摘　　要：对0.10C5Mnn2Al钢在750~850℃,10-2/s的应变速率下进行高温拉伸试验及组织结构表征。研究结果表明,0.10C5Mn2Al钢在750℃,800℃、850℃下,10-2/s的应变速率下的伸长率分别为320%、570%和730%,均获得了超塑性的现象,在超塑性变形过程中,由于变形和高温的共同作用导致了奥氏体和铁素体晶粒均长大,其中变形是导致晶粒长大的主要原因。The high temperature tensile test and microstructure characterization of 0.10 C5 Mn2 Al steel with strain rates 10-2/s at 750~850 ℃ are carried out.The results show that the elongation of 0.10 C5 Mn2 Al steel strain rate 10-2/s at 750℃、800℃ and 850 is 320%、570% and 730% respectively to obtain superplasticity.In the process of superplastic deformation,both austenite and ferrite grains grow due to the combination of deformation and high temperature and the reformation is the main cause of grain growth.

关 键 词：冷轧中锰钢 超塑性 高温拉伸 高应变速率 

分 类 号：TG142.1[一般工业技术—材料科学与工程]