理化检验-物理分册2017，Vol.53Issue(11)：782-785,4.DOI:10.11973/lhjy-wl201711003
冷却速率对30CrNiMo8钢过冷奥氏体转变的影响
Influence of Cooling Rates on Super-Cooled Austenite Transformation of 30CrNiMo8 Steel
史远 1黄胜永 2安治国1
作者信息
- 1. 河钢集团钢研总院,石家庄 050000
- 2. 河钢集团石钢公司技术中心,石家庄 050031
- 折叠
摘要
Abstract
The critical temperatures of 30CrNiMo8 steel were determined by dilatometer method combined with metallographic test and hardness test on a thermal dilatometer.Also,the continuous cooling transformation curves of super-cooled austenite were obtained.The influence of different cooling rates on microstructure and hardness of 30CrNiMo8 steel was studied.The results show that:with the increase of cooling rate between 0.02 -7 ℃•s-1 ,the microstructure of 30CrNiMo8 steel transformed from granular bainite mainly to martensite mainly, and the hardness also increased gradually; the critical cooling rate of martensite transformation was 1.0-1.5 ℃•s-1 ,which showed 30CrNiMo8 steel had better hardenability.关键词
30CrNiMo8钢/连续冷却转变曲线/显微组织/淬透性Key words
30CrNiMo8 steel/continuous cooling transformation curve/microstructure/hardenability分类
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史远,黄胜永,安治国..冷却速率对30CrNiMo8钢过冷奥氏体转变的影响[J].理化检验-物理分册,2017,53(11):782-785,4.
