摘要
利用扫描电镜、x射线衍射和电子背散射衍射技术研究了微碳DP钢在连续退火加热段的组织与织构演变。结果表明：热轧组织为铁素体加退化态珠光体，冷轧过程中铁素体被拉长并出现一定量的形变带；再结晶初期（720℃到750℃），多边形铁素体体积分数约30％，形变带易诱发{001}-{112}〈110〉取向晶粒优先形核与长大；再结晶后期（750℃到780℃），铁素体完全再结晶，硬质相逐渐溶解，〈lll〉／／ND纤维晶粒逐渐吞噬〈110〉//RD晶粒而长大。{001）〈110〉取向密度在再结晶初期和相变阶段剧烈增加，而相变对〈111〉／／ND织构影响较小。
The microstructure and textural evolution of micro-carbon DP steel during the heating stage of continued annealing process was studied using SEM, XRD and EBSD technique. Results show that, the microstructure of hot-rolled plate consisted of ferrite and degraded pearlite. Deformed elongat- ed ferrtite grains and deformed band was observed during cold rolling process. During the initial stage of recrystallization （from 720℃ to 750℃）, the volume fraction of polygonal ferrite increased about 30%, and the deformed band easily induced the {001}-{112}〈110〉 oriented grains nucleation and growth priority. During the latter stage of recrystallization （from 750℃ to 780℃ ）, ferrite was almost fully recrystallized, 〈111〉//ND fiber grain grew up and gradually swallowed 〈110〉//RD grain. The intensity of {001} 〈110〉 orientation significantly increased due to carbide dissolution during high-temperature annealing, and the 〈 111 〉fiN D fiber texture hardly affected by transformation.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2013年第6期561-568,共8页
Chinese Journal of Materials Research
基金
国家自然科学基金50904006
中央高校基本科研业务费FRTTP10001A资助项目~~
关键词
金属材料
DP钢
微观组织
织构演变
再结晶
etallic materials, DP steel, microstructure, texture evolution, recrystallization
