模拟控轧控冷过程含Nb超低碳钢的组织演变

特殊钢 ›› 2005, Vol. 26 ›› Issue (6): 38-40.

模拟控轧控冷过程含Nb超低碳钢的组织演变

郭爱民,贺信莱,陈颜堂,付俊岩,侯豁然

北京科技大学材料物理系，北京100083；
武汉钢铁(集团)公司技术中心，武汉430080；
中信铌钢集团公司，北京100012

收稿日期:2005-08-01 出版日期:2005-11-08 发布日期:2023-04-12
作者简介:郭爱民(1965-),男，教授，副主任，金属材料研究与开发。武汉钢铁(集团)公司技术中心，武汉430080
基金资助:
中国中信金属公司和巴西矿业公司 (CBMM) 提供研究经费

Structure Evolution of a Nb-Microalloyed Extra-Low Carbon Steel during Simulated Thermomechanical Control Process

Guo Aimin ，He Xinlai，Chen Yantang，Fu Junyan ， Hou Huoran

Science and Technology University,Beijing 100083;
Technology Center,Wuhan Iron and Steel(Group)Co,Wuhan 430080;
Zhongxin Nigang(Group)Co,Beijing 100012

Received:2005-08-01 Published:2005-11-08 Online:2023-04-12

摘要/Abstract

摘要： 用Thermecmastor-Z型热模拟机模拟试验了成分(%)为:0.03C-1.05Mn-0.6Cr-0.08Nb的Nb超低碳钢加热1 200℃后冷至850℃压缩变形50%,并在850℃下保温20~1 000 s后快冷至450℃,再空冷的过程中的组织演变。试验结果表明,随50%变形后保温时间的延长,钢中针状铁素体及贝氏体数量减少,多边铁素体数量增加,马氏体-奥氏体(M-A)岛尺寸增大,组织中位错密度降低;当50%变形后,保温时间>50 s时,显微硬度(Hv10)值快速下降,保温时间≥500 s时,Hv10值下降较慢。

关键词: 超低碳, Nb微合金化, 控轧控冷, 热模拟, 组织演变

Abstract: The structure evolution of a Nb-microalloyed extra-low carbon steel 0.03C- 1.05Mn-0.6Cr-0.08Nb during 1200 ℃ heating,then cooling to 850 ℃ and reducing 50%,holding at 850 ℃ for 20~1000 s fast cooling to 450 ℃,air cooling has been simulated and tested by Thermecmastor -Z thermal simulator. The test results showed that with increasing holding time after reduction 50%,the amount of acicular ferrite and bainite in steel and the dislocation density in structure decreased,where the size of martensite-austerite(M-A)island increased; As the holding time after reduction 50% was more than 50 s, the micro hardness(Hv10)value quick decreased but that more than 500 s the Hv10 hardness value decreased slowly.

Key words: Extra-Low Carbon,Nb Micro-Alloying,Thermomechanical Control Process,Thermal Simulation, Structure Evolution

郭爱民, 贺信莱, 陈颜堂, 付俊岩, 侯豁然. 模拟控轧控冷过程含Nb超低碳钢的组织演变[J]. 特殊钢, 2005, 26(6): 38-40.

Guo Aimin , He Xinlai, Chen Yantang, Fu Junyan , Hou Huoran. Structure Evolution of a Nb-Microalloyed Extra-Low Carbon Steel during Simulated Thermomechanical Control Process[J]. Special Steel, 2005, 26(6): 38-40.

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