ULC-BH钢连续退火过程织构的演变规律研究
Research on Texture Evolution Law During Continuous Annealing for ULC-BH Steel
冯月雪1, 康永林1, 刘光明2, 滕华湘
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作者单位：1. 北京科技大学 材料科学与工程学院, 北京 100083; 2. 首钢技术研究院, 北京 100041
中文关键字：ULC-BH钢； 织构； 定向形核； 选择长大
英文关键字：ULC-BH steel; texture; oriented nucleation; selective growth
中文摘要：利用X射线衍射研究了340 MPa级超低碳烘烤硬化钢(ULC-BH钢)连续退火三个阶段的织构演变规律。结果表明：再结晶初期，定向形核和选择生长的共同作用使得{111}织构增强，定向形核作用占据主体地位；再结晶后期，选择长大是{111}织构发展的主要方式。其中，{111}<110>织构在再结晶初期的定向形核作用下大幅度增加，而{111}<112>织构则是在再结晶后期选择长大的过程中涨幅较大；再结晶结束后适当升高温度有助于{111}织构的发展，过高升温则会引起相反的效果。
英文摘要：The laws of texture evolution during three continuous annealing stages of 340 MPa grade ULC-BH steel were studied by X-ray diffraction (XRD). The results show that, at the beginning of recrystallization, {111} texture increases under the actions of both oriented nucleation and selective growth, in which oriented nucleation play a major role with the {111}<110> texture increasing substantially, while selective growth is the main way of developing {111} texture in the later recrystallization and {111}<112> texture increases at this stage. It is helpful for {111} texture to raise temperature after the recrystallization, but it will also lead the opposite effect when it is overheated.