高性能桥梁钢A709M-HPS485wf动态再结晶临界条件的预测  

Prediction on critical conditions of dynamic recrystallization for advanced bridge steel A709M-HPS485wf

作　　者：禹宝军[1,2] 关小军[1,2] 赵健[1,2] 周兰聚[3] 王丽君[1,2] 刘千千[1,2] 

机构地区：[1]山东大学材料液固结构演变与加工教育部重点实验室,山东济南250061 [2]山东大学材料科学与工程学院,山东济南250061 [3]济南钢铁集团有限公司技术中心,山东济南250101

出　　处：《材料热处理学报》2011年第1期150-154,共5页Transactions of Materials and Heat Treatment

基　　金：高等学校博士学科点专项科研基金(200804220021);山东省自然科学基金(Y2007F06)

摘　　要：通过单道次等温热压缩实验,分别采用Najafizadeh-Jonas加工硬化率模型和Cingara-McQueen流变应力模型研究了高性能桥梁钢A709M-HPS485wf在温度为1273～1423 K,应变速率为0.1～3 s-1变形条件下的奥氏体动态再结晶临界条件,获得了动态再结晶的临界应力与峰值应力比(σc/σP)及临界应变与峰值应变比(εc/εP),且由线性回归方法建立了该钢动态再结晶临界应力(σc)及临界应变(εc)与变形参数之间的定量关系。Based on the stress-strain data collected from the single-pass isothermal compression tests,the critical conditions of dynamic recrystallization for advanced bridge steel A709M-HPS485wf at temperature ranging from 1273 K to 1423 K with strain rate from 0.1 s-1 to 3 s-1 were investigated by using both Najafizadeh-Jonas work hardening rate-stress model and Cingara-McQueen flow stress model.The ratios of critical stress to peak stress（σc /σP） and critical strain to peak strain（εc /εP） were determined.Furthermore,the quantitative relationships between critical conditions and deformation parameters were analyzed by linear regression.

关 键 词：A709M-HPS485wf钢 动态再结晶 加工硬化率 临界应力 临界应变 

分 类 号：TG111.7[金属学及工艺—物理冶金] TG142.41[金属学及工艺—金属学]