退火温度对加磷高强IF钢210P1组织及性能的影响  

Effects of Annealing Temperature on Microstructure and Properties of Phosphorous High Strength Interstitial Free(IF)Steel 210P1

作　　者：张奇 王金超 白晓东 Zhang Qi;Wang Jin-chao;Bai Xiao-dong(Inner Mongolia Baotou Steel Rare Earth Steel Plate Co.,Ltd.,Baotou 014010,Inner Mongolia Autonomous Region,China)

机构地区：[1]内蒙古包钢稀土钢板材有限责任公司,内蒙古包头014010

出　　处：《包钢科技》2022年第2期57-59,77,共4页Science & Technology of Baotou Steel

摘　　要：对加磷高强IF钢210P1的连续退火工艺进了试验,采用光学显微镜、扫描电镜、万能拉伸试验机等分析手段,研究了不同退火温度对210P1冷轧钢带微观组织及力学性能的影响。结果表明,随着退火温度的升高,晶粒尺寸逐渐增大,未再结晶组织转变为再结晶组织,组织形态由长条状转变为等轴状。210P1退火组织均为铁素体组织,晶界处存在少量TiN析出相,未发现FeTiP有害相,证实了连续退火工艺不会导致FeTiP相的析出。210P1随着退火温度的提高,屈服强度与抗拉强度呈现降低趋势,伸长率、n值、r值呈现升高的趋势,特别是780℃退火后,r值明显提高。The continuous annealing process of phosphorus high strength IF steel 210P1 is tested.The effects of different continuous annealing temperatures on the microstructure and mechanical properties of cold rolled strip 210P1 are investigated with such analysis methods as optical microscope,scanning electron microscope and universal tensile testing machine.The results showed that the grain size gradually increased,non-recrystallization microstructure transformed to recrystallized microstructure and form of microstructure changed from long strip to equiaxed shape with the increase of annealing temperature.The annealing microstructure of steel 210P1 was all ferrite and there was a small quantity of precipitated phase of TiN at grain boundary.The detrimental phase of FeTiP was not discovered so as to demonstrate the continuous annealing process could not cause the phase of FeTiP to be precipitated.The yield strength and tensile strength tended to decrease,elongation,n value and r value tended to increase as well as r value of steel 210P1 increased obviously especially after the annealing of 780℃with the increase of annealing temperature.

关 键 词：加磷高强IF钢 连续退火 210P1 晶粒尺寸 析出相 

分 类 号：TG156.24[金属学及工艺—热处理]