终轧温度对443铁素体不锈钢组织、织构及成形性能的影响

Effect of finishing rolling temperature on microstructure,texture and formability of ferritic stainless steel 443

通过光学显微镜、EBSD等分析技术,研究了终轧温度对443超纯铁素体不锈钢显微组织、织构、成形性能及抗表面起皱性能的影响规律。结果表明,降低终轧温度有利于促进443钢热轧退火态及冷轧退火态的再结晶,并使冷轧退火态组织更为细小均匀;降低终轧温度可有效强化冷轧退火态的γ纤维织构,是提高r值和杯突值、改善冷轧退火板成形性能、抗表面起皱性能的有效方式。

Effect of finishing rolling temperature on microstructure,texture,formability and surface ridging resistance of ultra-purified ferritic stainless steel 443 was investigated by means of optical microscope,EBSD and other analysis technologies.The results show that lowering the finishing rolling temperature promotes recrystallization of both hot rolled and annealed steel sheets,and makes the microstructure of final cold rolled-annealed sheet refined and homogenized.The γ-fiber texture in cold rolled-annealed state can be strengthened effectively by reducing the final rolling temperature,which is an effective way to improve the r value,cupping value,formability and surface ridging resistance.