Dynamic Continuous Cooling Transformation Curves of Hot Stamping Steel BR1500HS
摘 要
利用Gleeble-1500型热模拟试验机研究了冷却速率对BR1500HS热成形钢相变的影响, 借助Origin软件绘制了该钢的动态连续冷却转变(CCT)曲线, 并对试验钢进行了显微组织观察和显微硬度测试。结果表明: BR1500HS热成形钢在连续冷却过程中存在珠光体、贝氏体和马氏体转变; 试验钢在0.5~1 ℃·s-1低冷速条件下的相变产物为铁素体和珠光体; 冷速为5 ℃·s-1时, 开始出现贝氏体相变; 冷速高于5 ℃·s-1后的相变产物为马氏体和贝氏体, 冷速大于20 ℃·s-1后只有马氏体相变。
Abstract
In order to investigate effects of cooling rate on phase transition of hot stamping steel BR1500HS, dynamic continuous cooling transformation (CCT) behaviors of the steel were simulated on Gleeble-1500 thermo-mechanical simulator assisted by Origin software. And microstructure observation and micro-hardness test were carried out as well. The results show that the transformation of pearlite, bainite and martensite occured in the continuous cooling process. The ferrite and pearlitic could be obtained with the cooling rates of 0.5-1 ℃·s-1. The microstructure was bainite with the cooling rate of 5 ℃·s-1. And the cooling rates was higher than 5 ℃·s-1, martensite transformation also started. Only the martensite appeared when the cooling rate was greater than 20 ℃·s-1.
中图分类号 TG142
所属栏目 试验研究
基金项目 上海市数字化汽车车身工程重点实验室资助项目(201003)
收稿日期 2012/2/8
修改稿日期 2012/9/20
网络出版日期
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备注徐春(1963-), 女, 江苏建湖人, 教授, 博士。
引用该论文: XU Chun,LIANG Bao-qian. Dynamic Continuous Cooling Transformation Curves of Hot Stamping Steel BR1500HS[J]. Materials for mechancial engineering, 2013, 37(2): 10~12
徐春,梁宝钱. BR1500HS热成形钢的动态连续冷却转变曲线[J]. 机械工程材料, 2013, 37(2): 10~12
被引情况:
【1】靳永明,张宜生,梁卫抗,郑徐雨,李阳, "加热速率对22MnB5超高强度钢奥氏体化的影响",机械工程材料 40, 80-83(2016)
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