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.
出处
《热加工工艺》
CSCD
北大核心
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)
关键词
AH32钢
热变形
动态回复
动态再结晶
热模拟
AH32 steel
hot deformation
dynamic recovery
dynamic recrystallization
thermal simulation
