两相区退火温度对TRIP590钢组织和性能的影响  

Effect of annealing temperature on microstructure and mechanical properties of TRIP590 steel

作　　者：贾书君 刘清友 刘明辉[2] 高洪刚[2] 

机构地区：[1]中国钢研科技集团公司,北京100081 [2]本溪钢铁集团公司,辽宁本溪117000

出　　处：《材料热处理学报》2013年第6期110-114,共5页Transactions of Materials and Heat Treatment

摘　　要：采用热模拟试验研究了两相区退火温度对TRIP590钢组织和性能的影响。结果表明:随着两相区退火温度的升高,铁素体体积分数先减少后增加,铁素体平均晶粒尺寸在整个实验温度范围内随着退火温度的升高一直减小;780～860℃范围退火时,残留奥氏体量和残留奥氏体富碳量都在820℃附近出现一个低谷,温度低于或高于820℃,残留奥氏体含量和残留奥氏体富碳量都增加,860℃退火时,残奥量和富碳量都最大;两相区退火温度的变化对抗拉强度基本影响不大,屈服强度随退火温度的变化略有增加,伸长率在820℃出现一个低谷,退火温度低于820℃时,伸长率随退火温度升高而降低,退火温度高于820℃时,伸长率随温度升高而升高,860℃退火时,伸长率达到最大值23%。The effects of inter critical annealing temperature on microstrueture and mechanical properties of a TRIP590 steel were investigated. The results show that the volume fraction of ferrite firstly decreases and then increases with annealing temperature increasing, but the average grain size of ferrite always decreases. The volume fraction of retained austenite and C concentration in austenite both reach a minimum value at 820 cC as annealing temperature increases from 780 ℃ to 860 ℃. The annealing temperature has little effect on tensile strength, while the yield strength increases slightly with increasing annealing temperature. The minimum value of elongation occurs for the steel annealed at 820 ℃ , and the elongation reaches the maximum value at 860℃.

关 键 词：退火温度 多边形铁素体 残留奥氏体 富碳量 伸长率 

分 类 号：TG135.3[一般工业技术—材料科学与工程]