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为了观察高强IF钢退火处理后的显微组织和再结晶织构的变化规律,采用两种不同退火工艺对高强IF钢进行热处理。结果表明,IF钢在两种退火方式下均形成了γ-{111}纤维织构,快速升温(350℃/min)退火时,再结晶新核呈等轴状,由变形带内的亚晶合并形成,与冷轧变形基体保持相同取向。慢速升温(2℃/min)退火时,新核在晶界弓出形成,且沿轧制方向呈饼形分布,与基体没有明显取向关系。慢速升温退火样品的γ-{111}取向密度强于快速升温的。对进一步改善薄板钢深冲性能具有指导作用。
In order to observe the variation of microstructure and recrystallization texture of high-strength IF steel after annealing, two different annealing processes were used to heat treat the high-strength IF steel. The results show that the γ-{111} fiber texture is formed in the IF steel under both annealing conditions. When the steel is rapidly annealed at 350 ℃ / min, the new nuclei are equiaxed, Merged to form, and cold deformation base to maintain the same orientation. When annealed at a slow temperature (2 ° C / min), new nuclei are bowed out at grain boundaries and distributed in a cake shape along the rolling direction, showing no obvious orientation relationship with the matrix. The γ- {111} orientation density of slow-temperature annealing samples is faster than that of rapid heating. It is instructive to further improve the deep drawing performance of sheet steel.