固溶温度对2205双相不锈钢超塑性的影响  

Effect of solution treatment on superplasticity of 2205 duplex stainless steel

作　　者：李少峰[1,2] 任学平[1] 李殊霞[1] 李开松[1] 徐辉[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]山西利民工业有限责任公司,山西030812

出　　处：《塑性工程学报》2013年第2期84-88,共5页Journal of Plasticity Engineering

摘　　要：观察2205双相不锈钢固溶处理后的组织,并对组织中铁素体与奥氏体的两相比例进行统计分析;对2205双相不锈钢经过不同温度的固溶处理、冷轧变形后,在一定条件下进行恒温拉伸试验,观察研究材料的超塑性延伸率随着固溶温度和两相比例的变化规律。试验结果表明,当固溶温度从1050℃升高到1100℃时,奥氏体相所占比例变化不大,材料的延伸率变化也不明显;当固溶温度从1150℃增加到1350℃时,奥氏体相比例从42.76%降低到26.07%,铁素体与奥氏体的两相比变大,其延伸率也逐渐增大。冷轧变形量为80%的材料,其延伸率从560%增大到1690%;冷轧变形量为85%的材料,其延伸率从810%增大到1500%。Microstructure of 2205 duplex stainless steel after solution treatment was observed, and the phase ratio of ferrite to austenite was analyzed. The superplastic deformation was performed under certain conditions after solution treatment and cold rolling deformation. Superplasticity variation of 2205 duplex stainless steel along with solution temperature and phase ratio has been studied. Research showed that when the solution temperature rose from 1050℃ to 1100℃, austenite phase ratio changed little, and so did the elongation. When the solution temperature rose from 1150℃ to 1350℃, austenite phase ratio decreased from 42.76% to 26.07%, the ratio of ferrite to austenite increased, and the elongation became larger. The elongation of materials with cold deformation of 80% increased from 560 % to 1690%. And the elongation of materials with cold deformation of 85 % increased from 810% to 1500%.

关 键 词：双相不锈钢 超塑性 固溶处理 两相比 

分 类 号：TG135.3[一般工业技术—材料科学与工程]