双相区热处理对430铁素体不锈钢热轧板组织和性能的影响

研究了α+γ双相区热处理对430铁素体不锈钢热轧板显微组织和力学性能的影响,并与工业罩式炉退火后的热轧板显微组织和力学性能进行了对比分析。结果表明:在双相温度区间对430不锈钢热轧板进行热处理,分割了热轧板轧向的条带状组织,抑制了聚集组织的形成。与常规罩式炉退火工艺相比,双相区热处理显著提高了430不锈钢热轧板的伸长率,降低了屈服强度和硬度,有利于改善最终冷轧产品的冲压性能和抗起皱性。

Effect of heat treatment in dual-phase region on microstructure and property of 430 ferritic stainless steel hot rolled sheet

Effect of heat treatment in ferrite and austenite phase field on microstructure and properties for 430 stain-less steel hot rolled sheets was investigated.Also its microstructure and properties were compared with that of the hot rolled sheets after annealing in the industrial batch annealing furnace.The results showed that heat treatment in dual phase temperature range for 430 stainless steel hot rolled sheets could split banded structure along the roll-ing direction and inhibit the formation of aggregate structure.Compared with the conventional batch annealing process,dual phase region heat processing can significantly increase the elongation of 430 stainless steel hot rolled sheets and lower the yield strength and hardness.It is proved that dual phase region heat processing is also benefi-cial to improving the forming performance and wrinkle resistance of final cold rolled sheets.