理化检验-物理分册2024，Vol.60Issue(2)：10-12,16,4.DOI:10.11973/lhjy-wl202402003
一种热冲压成形钢的连续冷却转变曲线测定及其显微组织
Determination of CCT curve and microstructure of a hot stamping steel
雷娜 1周志超 1杨志权 1赵乃胜 1沈洁 1王明辉1
作者信息
- 1. 北京首钢股份有限公司, 迁安 064400
- 折叠
摘要
Abstract
Taking a hot stamping steel 22MnB5 as the test material,the critical transformation point of the steel was measured on the quenching phase change instrument by combining the expansion method with the metallographic method and the hardness method,and the continuous cooling transformation curve of the material was obtained.The results show that when the cooling rate was 0.1℃/s,the microstructure was coarse ferrite and pearlite.When the cooling rate was 0.5-5℃/s,the microstructure was mainly bainite,with a small amount of pearlite and ferrite.When the cooling rate was greater than 7.5℃/s,the microstructure was martensite and bainite.When the cooling rate was greater than 20℃/s,the bainite transformation basically ended and all transformed into martensite.Vickers hardness increased with the increase of cooling rate.关键词
热冲压成形钢/连续冷却转变曲线/冷却速率/显微组织/硬度/膨胀曲线Key words
hot stamping forming steel/continuous cooling transformation curve/cooling rate/microstructure/hardness/dilatometric curve分类
通用工业技术引用本文复制引用
雷娜,周志超,杨志权,赵乃胜,沈洁,王明辉..一种热冲压成形钢的连续冷却转变曲线测定及其显微组织[J].理化检验-物理分册,2024,60(2):10-12,16,4.
