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

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.