东北大学学报:自然科学版 ›› 2019, Vol. 40 ›› Issue (8): 1099-1104.DOI: 10.12068/j.issn.1005-3026.2019.08.007

• 材料与冶金 • 上一篇    下一篇

冷轧工艺对铁素体不锈钢成形性能的影响

刘后龙, 刘玲玲, 李兴, 陈礼清   

  1. (东北大学 轧制技术及连轧自动化国家重点实验室, 辽宁 沈阳110819)
  • 收稿日期:2018-08-23 修回日期:2018-08-23 出版日期:2019-08-15 发布日期:2019-09-04
  • 通讯作者: 刘后龙
  • 作者简介:刘后龙(1991-),男,安徽安庆人,东北大学博士研究生; 陈礼清(1965-), 男, 安徽安庆人, 东北大学教授, 博士生导师.
  • 基金资助:
    国家自然科学基金委员会-中国宝武钢铁集团有限公司钢铁联合研究基金资助项目(U1660205).

Influence of Cold Rolling Process on Formability of a Ferritic Stainless Steel

LIU Hou-long, LIU Ling-ling, LI Xing, CHEN Li-qing   

  1. State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, China.
  • Received:2018-08-23 Revised:2018-08-23 Online:2019-08-15 Published:2019-09-04
  • Contact: CHEN Li-qing
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摘要: 为了研究冷轧工艺对新型铁素体不锈钢19Cr2Mo1W成形性能的影响,采用XRD,EBSD技术以及平均塑性应变比与粗糙度测量等手段,研究了不同压下率冷轧及随后退火过程中的织构演变和微观组织变化,并讨论了织构和微观组织对成形性能的影响.结果表明:随着冷轧压下率的增加,铁素体不锈钢中的α和γ纤维织构均有所增强,且α和γ纤维织构最终稳定取向分别为223〈110〉和111〈011〉.冷轧板α纤维织构中223〈110〉组分越强,退火后γ再结晶织构强度越高.冷轧板在1050℃退火时,薄板的γ再结晶织构强度高,再结晶组织均匀且尺寸较小,表面粗糙度最小,综合成形性能最佳.

关键词: 铁素体不锈钢, 冷轧, 织构演变, 微观组织, 成形性能

Abstract: In order to study the effect of cold rolling process on the formability of 19Cr2Mo1W ferritic stainless steel, the micro structure and texture evolution of this steel during cold-rolling and annealing processes were investigated by X-ray diffraction(XRD), electron back-scatter diffraction(EBSD),roughness and plastic strain ratio analytical methods. The results indicated that the amount of α and γ fiber textures in cold-rolled sheet increased with the increase of cold rolling reduction, and the stable orientation of α and γ fiber textures during cold rolling was223〈110〉and 111〈011〉component, respectively. In addition, the strength of the γ recrystallization texture became higher, when the amount of223〈110〉component increased. After annealing at 1050℃ for 1 min, the recrystallized ferritic grains in the sheet distributed uniformly with a fine grain size, the surface roughness was small and the strength of the γ fiber texture was relatively high, i.e.,the formability of the cold-rolled steel sheet was the best.

Key words: ferritic stainless steel, cold rolling, texture evolution, microstructure, formability

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