| 引用本文: | 张帅,李静媛,杜伟,江来珠.一种新型铁素体不锈钢的深冲性能研究[J].材料科学与工艺,2015,23(1):25-31.DOI:10.11951/j.issn.1005-0299.20150105. |
| ZHANG Shuai,LI Jingyuan,DU Wei,JIANG Laizhu.Deep drawing performance of a new-type ferritic stainless steel[J].Materials Science and Technology,2015,23(1):25-31.DOI:10.11951/j.issn.1005-0299.20150105. |
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| 摘要: |
| 为探究一种新型铁素体不锈钢的深冲性能,在840～920 ℃不同温度下对新型铁素体不锈钢的冷轧板做再结晶退火处理,通过XRD、SEM和EBSD等分析方法研究了退火2 min或4 min后,材料微观组织、宏观织构的变化规律对深冲性能的影响及其内在机理.研究表明:保持退火时间2 min,退火温度900 ℃时,试验钢拥有较多的有利γ纤维织构,主要为{111}<112>取向,并有少量α纤维织构,此时平均塑性应变比r-=1.77,高于其他退火温度下的值；延长退火时间,在900 ℃下保温4 min,不同取向晶粒获得了长大机会,晶粒尺寸均匀性显著改善,r-值提高至1.82,试验钢有望取得理想深冲性能. |
| 关键词: 铁素体不锈钢 退火 深冲性能 微观组织 织构 |
| DOI：10.11951/j.issn.1005-0299.20150105 |
| 分类号:TG142.1 |
| 基金项目:十二五国家科技支撑计划资助项目(2012BAE04B02)；国家自然科学基金资助项目(51174026). |
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| Deep drawing performance of a new-type ferritic stainless steel |
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ZHANG Shuai1, LI Jingyuan1,DU Wei2,JIANG Laizhu2
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(1.School of Material Science and Engineering, University of Science and Technology Beijing, Beijing 10083, China; 2.Baoshan Iron and Steel Co.Ltd, Shanghai 200431, China)
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| Abstract: |
| To explore the deep drawing property of a new-type ferritic stainless steel, cold-rolled sheets of the steel were treated between 840~920 ℃ by recrystallization annealing, and the evolution of microstructure, macro-texture and their effects on deep drawability when annealing for 2 and 4 min were studied by XRD, SEM, EBSD. Results show that when annealed at 900 ℃ for 2 min, much favorable γ fiber texture with {111}<112> orientation and a small amount of α fiber texture appeared. The average plastic strain ratio r- was 1.77, which was higher than that of other temperatures, this was because grains with {111} orientation contained much low coincidence site lattice grain boundary, which had a priority to grow up and high movement speed. Annealing at 900 ℃ for 4 min, grains that had different orientations all got chance to grow up, the uniformity of the grain size had also been improved significantly, the r- was raised to 1.82, and ideal deep drawability might be expected. |
| Key words: stainless steel anneal deep drawability microstructure texture |
