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材料工程  2012, Vol. 0 Issue (12): 89-94,101    
  测试与表征 本期目录 | 过刊浏览 | 高级检索 |
低碳Cr-Mo系深冲双相钢组织与织构演变
汪志刚, 赵征志, 赵爱民, 叶洁云, 程俊业, 黄耀
北京科技大学 冶金工程研究院,北京 100083
Microstructure and Texture Evolution of Low-carbon Cr-Mo Deep Drawing Dual-phase Steel
WANG Zhi-gang, ZHAO Zheng-zhi, ZHAO Ai-min, YE Jie-yun, CHENG Jun-ye, HUANG Yao
Research Institute of Metallurgy Engineering,University of Science and Technology Beijing,Beijing 100083,China
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摘要 通过组织观察以及TEM与XRD技术研究了低碳Cr-Mo系深冲双相钢组织与织构演变规律。 结果表明:奥氏体未再结晶区终轧有利于形成{112}〈111〉织构,冷轧过程中{001}〈110〉,{112}〈110〉与{223}〈110〉织构稳定增加,退火过程中形成有利于深冲性能的〈111〉//ND以及{554}〈225〉与{332}〈113〉织构;820℃与860℃临界区退火后γ纤维织构密度差异较小,但是高温退火增大{111}〈110〉与{111}〈112〉织构的取向密度差值,归因于贝氏体中的固溶碳以及贝氏体相变时的变体选择;高温卷取能诱发热轧板中Mo基碳化物粒子析出,并在退火保温过程中回溶,既能发展再结晶织构,又能促进第二相形成。
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汪志刚
赵征志
赵爱民
叶洁云
程俊业
黄耀
关键词 深冲双相钢显微组织力学性能织构r    
Abstract:Microstructure and texture evolution of low-carbon Cr-Mo deep drawing dual-phase steel were investigated by using microstructure observation, TEM and XRD. The results show that, the finish-rolling process conducted in austenite no-recrystallization zone promoted the formation of {112}〈111〉 component. The intensity of {001}〈110〉,{112}〈110〉 and {223}〈110〉 orientations were steadily enhanced during cold rolling.The formation of sharper 〈111〉//ND, {554}〈225〉 and {332}〈113〉 textures during annealing was favorable to improve the deep draw-ability of dual-phase steel. When intercritical annealed at 820℃ and 860℃, the intensity of γ-fibre was slightly different. The difference of intensity between {111}〈110〉 and {111}〈112〉 texture tended to increase at high-temperature annealing, causing by the solution-carbon of bainite and the variant selection from austenite to bainite. The high-temperature coiling process induced precipitation of Mo-based carbide in hot-rolled strips, and re-dissolution during the holding stage in annealing process, which not only facilitated the formation of recrystallization textures, but also improved the second phase transformation.
Key wordsdeep drawing dual-phase steel    microstructure    mechanical property    texture    r value
收稿日期: 2012-03-12      出版日期: 2012-12-20
中图分类号: 

TG115.2

 
  TG142.7

 
基金资助:

国家自然科学基金资助项目(50904006);中央高校基本科研业务费专项资金资助项目(FRF-TP-10-001A)

通讯作者: 赵征志(1977-),男,副研究员,研究方向:先进汽车用钢和薄板坯连铸连轧,联系地址:北京市海淀区学院路30号北京科技大学冶金工程研究院科技楼703(100083)     E-mail: zhaozhzhi@ustb.edu.cn
作者简介: 汪志刚(1983-),男,博士研究生,主要研究方向:超深冲双相钢织构演变与组织性能优化,联系地址:北京市海淀区学院路30号北京科技大学冶金工程研究院(100083),E-mail:wzgang2008cn@163.com
引用本文:   
汪志刚, 赵征志, 赵爱民, 叶洁云, 程俊业, 黄耀. 低碳Cr-Mo系深冲双相钢组织与织构演变[J]. 材料工程, 2012, 0(12): 89-94,101.
WANG Zhi-gang, ZHAO Zheng-zhi, ZHAO Ai-min, YE Jie-yun, CHENG Jun-ye, HUANG Yao. Microstructure and Texture Evolution of Low-carbon Cr-Mo Deep Drawing Dual-phase Steel. Journal of Materials Engineering, 2012, 0(12): 89-94,101.
链接本文:  
http://jme.biam.ac.cn/CN/      或      http://jme.biam.ac.cn/CN/Y2012/V0/I12/89
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