装炉方式对BN1TL不锈钢边部鳞折缺陷的影响  

Effect of furnace charging methods on the scale fracture defect of BN1TL stainless steel

作　　者：孟新宇 管国富 邹宇明 黄德川 李中杰 唐正友 丁桦[1,3] Meng Xinyu;Guan Guofu;Zou Yuming;Huang Dechuan;Li Zhongjie;Tang Zhengyou;Ding Hua(School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China;Baosteel Desheng Stainless Steel Co.,Ltd.,Fuzhou 350601,China;Liaoning Key Laboratory of Key Metal Structural Materials for Lightweight,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学材料科学与工程学院,沈阳110819 [2]宝钢德盛不锈钢有限公司,福州350601 [3]东北大学辽宁省轻量化用关键金属结构材料重点实验室,沈阳110819

出　　处：《材料与冶金学报》2024年第3期256-263,共8页Journal of Materials and Metallurgy

基　　金：宝钢中央研究院项目(K2019ZZ01).

摘　　要：利用ABAQUS软件对BN1TL不锈钢在步进式加热炉内的加热过程进行分析,使用JMatPro软件模拟计算了BN1TL连铸坯在平衡状态下的凝固过程并绘制出凝固相图,同时还研究了不同装炉方式下连铸坯的析出行为.结果表明:在凝固过程中,随着温度的降低,连铸坯晶界碳化物数量逐渐增多;在加热初期,连铸坯边部区域会产生较大热应力,热冲击和晶界弱化的共同作用会降低边部质量,使冷装装炉方式下边部应力集中及晶界弱化的程度均大于热装装炉方式,这是冷装装炉方式比热装装炉方式鳞折缺陷率高的根本原因;经冷装装炉方式加工的板材卷取后,晶界碳化物数量仍较多,这可能会影响后续冷轧等工艺阶段.ABAQUS software was used to analyze the heating process of BN1TL stainless steel in the walking heating furnace,and JMatPro software was used to simulate and calculate the solidification of BN1TL continuous casting slab in the equilibrium state,and draw the solidification phase diagram.The precipitation behavior with different charging methods was studied and the precipitation phase was characterized.The results show that the number of grain boundary carbides gradually increases with the decrease of temperature during the solidification process of the continuous casting slab;in the early stage of heating,a large thermal stress is generated in the edge region of the slab,and the combined effect of thermal shock and grain boundary weakening decreases the quality of the edge of the slab.The difference is that the edge stress concentration and grain boundary weakening degree of cold charging are greater than those of hot charging,which is the fundamental reason for the higher scale defect rate of cold charging than hot charging.In addition,after the plate processed by cold charging is coiled,the number of grain boundary carbides is still large,which may also affect the subsequent process stages such as cold rolling.

关 键 词：BN1TL不锈钢 鳞折缺陷 装炉方式 温度应力场 析出相 

分 类 号：TG141[一般工业技术—材料科学与工程]