摘要
利用实验室热处理模拟研究了再加热温度、轧后冷速、回火温度等因素对石油钻探用热轧贝氏体非调质钢管组织和性能的影响。结果表明,钢管轧制过程中的再加热温度从930℃降低至850℃,贝氏体和板条状马氏体的尺寸变得细小,空冷试验钢的冲击吸收能量从19.48 J提高至35.26 J;850℃下不同方式冷却试验钢的显微组织,组织为板条状和束状马氏体以及粒状贝氏体,空冷试验钢比炉冷试验钢的冲击吸收能量更高;而300~400℃回火后试验钢的冲击性能反而降低。在实际生产中,应适当降低钢管轧制过程中的再加热温度,适当加快轧后冷却速度,从而获得高韧性的贝氏体非调质钢管。
Effects of reheating temperature,cooling rate after rolling and tempering temperature on the microstructure and properties of hot-rolled non-tempered bainitic steel pipe for oil drilling were studied by laboratory heat treatment simulation.The results show that the reheating temperature decreases from 930℃to 850℃,the sizes of bainite and lath martensite become smaller,and the impact absorbed energy of air-cooled tested steel increases from 19.48 J to 35.26 J.When reheated at 850℃,the microstructure is lath and packet martensite and granular bainite,the impact absorbed energy of air cooled tested steel is higher than that of furnace cooled.However,the impact property of the tested steel decreases after tempering at 300-400℃.In the actual production,the reheating temperature of the steel pipe during hot rolling should be properly reduced,and the cooling rate after rolling should be properly accelerated,so as to obtain the high toughness of the non-tempered bainitic steel pipe.
作者
马丽娜
王啸宇
聂舒诺
何嘉琪
欧阳思亦
牛赛
吴萌
Ma Lina;Wang Xiaoyu;Nie Shunuo;He Jiaqi;Ouyang Siyi;Niu Sai;Wu Meng(School of Materials Science and Engineering,Nanjing Institute of Technology,Nanjing Jiangsu 211167,China)
出处
《金属热处理》
北大核心
2025年第2期225-229,共5页
Heat Treatment of Metals
基金
省级大学生创新创业训练计划(202311276172H)。
关键词
控轧控冷
贝氏体非调质钢
冲击性能
组织
controlled rolling and cooling
non-tempered bainitic steel
impact property
microstructure
