IF钢冷轧和退火过程的织构演变规律

Texture evolution law of IF steel during cold rolling and annealing

利用X射线衍射技术(XRD)研究了不同冷轧压下率、80%冷轧压下率并经不同退火条件的热轧高温卷取IF钢板材织构演变规律。结果表明,随压冷轧压下率增加,IF钢热轧卷板的织构演变特征为由弱{110}<110>、{110}<001>和{112}<110>织构逐步向{110}<011>、{100}<011>织构转变,并形成较弱的{111}面织构;80%压下率大冷轧变形IF钢板材中,利于γ-纤维织构发展的退火制度依次为790℃保温60 min、670℃保温10 min和790℃保温10 min;在更高的850℃退火处理时,容易形成{112}<110>等织构,抑制γ-纤维织构形成,不利于深冲性能提升。

Evolution of the texture of IF steel plates with different cold rolling reduction,and different annealed after hot rolling high temperature coils with 80% cold rolling reduction was studied by using X-ray diffraction(XRD).The results show that with the increase of cold rolling reduction,the weak {110}110,{110}001 and {112}110 textures of hot rolled coiled IF steel specimen gradually change to {110}011 and{100}011 textures,also a weak {111} plane texture is formed.For cold rolled IF steel plate with cold rolling reduction of 80%,the annealing conditions that are beneficial to formation of the γ-fiber texture in turn are as follows:790 ℃/60 min,670 ℃/10 min and 790 ℃/10 min.When annealed at a higher temperature of 850 ℃,the texture such as {112}110 is liable to form,which inhibits the formation of γ-fiber texture and is not conducive to the improvement of deep drawing performance.