船用高强度钢AH32热变形行为的研究  

Hot Deformation Behavior of AH32 Steel

作　　者：张建波[1,2] 彭谦之[1] 周海涛[1] 刘克明[1,3] 朱淑丽[1] 

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083 [2]博世汽车部件(长沙)有限公司,湖南长沙410010 [3]江西省科学院江西省铜钨新材料重点实验室,江西南昌3300291

出　　处：《热加工工艺》2012年第18期1-4,7,共5页Hot Working Technology

基　　金：国家自然科学基金项目(50961006);江西省铜钨新材料重点实验室开放基金项目(20114BAB206016);江西省自然科学基金项目(20114BAB206016)

摘　　要：采用Gleeble-1500热/力模拟机研究了AH32钢在应变速率0.01～10 s-1,变形温度800～1000℃下的高温塑性变形行为。结果表明,实验用钢的应力随应变速率的增加和变形温度的降低而增加,其热变形流变应力行为可采用Zener-Hollomon参数的双曲正弦函数来描述。以应力-应变曲线为基础,采用线性回归法确定了实验用钢的应力指数n和热变形激活能Q,分别建立了峰值应力σp和流变应力σ0.2及峰值应变εp和临界应变εc与Z参数的关系。The plastic deformation simulation of AH32 steel at elevated temperature was performed on Gleeble-1500 hot simulator under the strain rate between 0.01 and 10 s-1 and temperature range from 800℃ to 1000℃.The results show that the true stress increases with the increase of strain rate,while decreases with the increase of temperature;and the flow stress behavior can be described by the hyperbolic sine function of Zener-Hollomon parameter.The material constant hot deformation activation energy n and stress exponent Q were determined by linear regression method,and the relationship between peak stress σp,flow stress σ0.2 and Z parameters,the relationship between peak stress εp,critical strain εc and Z parameters were obtained on the basis of stress-strain curve.

关 键 词：AH32钢 热变形 动态回复 动态再结晶 热模拟 

分 类 号：TG301[金属学及工艺—金属压力加工]