卷取温度对超低碳T-3CA第二相析出的影响  

Effect of coiling temperature on precipitation of second phase in ultra-low carbon T-3 CA steel

作　　者：孙超凡 方圆 王雅晴 刘伟 潘宏伟 SUN Chao-fan;FANG Yuan;WANG Ya-qing;LIU Wei;PAN Hong-wei(Research Institute of Technology,Shougang Group Co. ,Ltd. ,Beijing 100043,China;Beijing Key Laboratory of Green Recyclable Process for Iron and Steel Production Technology,Beijing 100043,China;The Tinplate Department,Shougang Jingtang United Iron andSteel Co. ,Ltd. ,Tangshan 063200,Hebei,China)

机构地区：[1]首钢集团有限公司技术研究院,北京100043 [2]绿色可循环钢铁流程北京市重点实验室,北京100043 [3]首钢京唐钢铁联合有限责任公司镀锡板事业部,河北唐山063200

出　　处：《钢铁》2019年第7期83-87,共5页Iron and Steel

基　　金：国家重点研发计划专项资助项目(2017YFB0304004)

摘　　要：为研究卷取温度对超低碳T-3CA中第二相粒子析出行为的影响,采用金相、TEM等检测手段,分析了580、630、680℃3个典型卷取温度下超低碳T-3CA中第二相粒子的析出特性,结果发现卷取温度越高,热轧形成的TiC粒子尺寸越粗大,分布越稀疏。结合相关动力学计算分析了卷取温度对TiC粒子沉淀析出时临界晶核尺寸、相对形核率、相对沉淀析出时间的影响。结果表明,随着卷取温度由580提高到680℃,TiC粒子沉淀析出时临界晶核尺寸增大约1.0nm,相对形核率降低约1.0个数量级,相对沉淀析出孕育时间增大约0.8个数量级。In order to study the effect of coiling temperature on the precipitation behavior of the second phase particles in ultra-low carbon T-3 CA steel,the precipitation characteristic of the second phase particles in ultra-low carbon T-3 CA steel under three typical temperatures 580,630 and 680 ℃ were studied by OM and TEM.The results showed that the higher the coiling temperature,the larger the TiC particles and the sparser distribution of them would be formed during the hot-rolling process.The coiling temperature’s influence on the precipitation behavior of the TiC particles was analyzed by the kinetic calculation of TiC precipitation.The calculation showed that with the coiling temperature raise from 580 to 680 ℃,the size of the crystal nucleus of TiC particle would be increased by nearly 1.0 nm,the nucleation rate of the TiC particle would be decreased by almost 1.0 order of magnitude and the incubation time of the TiC particles would be prolonged by nearly 0.8 order of magnitude.

关 键 词：T-3CA 卷取温度 TiC粒子 析出 

分 类 号：TG142.31[一般工业技术—材料科学与工程]