水冷工艺对IF钢热轧卷组织和力学性能的影响  

EFFECT OF WATER COOLING TECHNOLOGY ON THE MICROSTRUCTURE AND MECHANICAL PROPERTIES OF IF STEEL HOT ROLLING

作　　者：李晓军 张亮亮 史震 Li Xiaojun;Zhang Liangliang;Shi Zhen(Shougang Jingtang Iron and Steel United Co.,Ltd.,Tangshan 063000,Hebei;Technical Research Institute of Shougang Group Co.,Ltd.,Beijing 100081;Beijing Key Laboratory of Green Recyclable Steel Process,Beijing 100081)

机构地区：[1]首钢京唐钢铁联合有限责任公司,河北唐山063000 [2]首钢集团有限公司技术研究院,北京100081 [3]绿色可循环钢铁流程北京市重点实验室,北京100081

出　　处：《河北冶金》2021年第6期14-17,58,共5页Hebei Metallurgy

摘　　要：为缩短IF钢热轧卷下线后的冷却时间,对入水温度为400~600℃的热轧卷表面氧化铁皮、显微组织和力学性能的变化进行了研究。结果表明,入水温度越高,热轧卷表面氧化铁皮越疏松,析出物尺寸越小、数量越少。且入水温度对热轧卷的力学性能影响不显著,水冷后最大屈服强度比自然冷却高约30 MPa。综合认为,将下线IF钢热轧卷温度控制在400℃以下再进行水槽冷却,可以在不影响其性能及表面质量的前提下,加快IF钢的冷却速率。In order to shorten the cooling time of IF steel after the hot rolling down line,the changes of the surface oxide scale,microstructure and mechanical properties of the hot rolled coil with water temperature of 400~600℃were studied.The results show that the higher the water temperature,the looser the oxide sheet on the surface of hot rolling coil,the smaller the size and quantity of precipitates.The effect of water temperature on the mechanical properties of hot rolled coil is not significant.The maximum yield strength after water cooling is about 30 MPa higher than that after natural cooling.It is considered that the cooling rate of IF steel can be accelerated without affecting its properties and surface quality by controlling the temperature of hot rolled coil below 400℃and then cooling in water tank.

关 键 词：水冷 IF钢 氧化铁皮 显微组织 入水温度 冷却速率 

分 类 号：TG115.6[金属学及工艺—物理冶金]