摘要
自主设计了一种微合金化8630钢。利用Gleeble-3500热模拟试验机在变形温度为850~1200℃、应变速率为0.01~10 s^(-1)、真应变为0.91条件下对其进行等温热压缩变形试验。结果表明,微合金化8630钢变形过程中出现持续加工硬化、动态再结晶及加工硬化与动态回复共同作用3种现象,材料流变应力随温度的降低和应变速率的增大而增大。根据所建立的本构方程与热加工图预测得到该材料的适宜热变形条件为温度950~1200℃、应变速率0.01~1 s^(-1)。
A kind of micro-alloying 8630 steel was independently designed. Isothermal hot compression deformation test was carried out on Gleeble-3500 thermal simulator at deformation temperature of 850-1200 ℃,strain rate of 0.01-10 s^(-1)and true strain of 0.91. The results show that three phenomena, namely continuous work hardening, dynamic recrystallization and the combined effect of work hardening and dynamic recovery occur during the deformation process of micro-alloying 8630 steel. The material flow stress increases with the decrease of temperature and the increase of strain rate. According to the established constitutive equation and thermal processing map, it is predicted that the suitable thermal deformation condition is temperature of 950-1200 ℃ and strain rate of 0.01-1 s^(-1).
作者
黄志新
朱琳
杨信文
张心金
段修刚
董治中
HUANG Zhi-xin;ZHU Lin;YANG Xin-wen;ZHANG Xin-jin;DUAN Xiu-gang;DONG Zhi-zhong(School of Materials Science and Engineering,Tianjin University of Technology,Tianjin 300380,China;Tianjin Heavy Equipment Engineering Co.,Ltd.,Tianjin 300451,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2021年第12期140-147,共8页
Journal of Plasticity Engineering
基金
高压井口装置用锻件材料研制及其制造工艺开发(17YFZCGX00900)。
关键词
微合金化8630
热变形
流变应力
热加工图
micro-alloying 8630
thermal deformation
flow stress
thermal processing map
