含Nb角钢腿部裂纹分析及改进  

Analysis and improvement on cracks of Nb-containing angle steel

作　　者：郭菁[1] 高宇 庞启航 张俊凯 王忠军[1] 李维娟[1] GUO Jing;GAO Yu;PANG Qihang;ZHANG Junkai;WANG Zhongjun;LI Weijuan(School of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan 114051,China;Anshan Zizhu Sci.&Tech.Profile Steel Co.,Ltd,Anshan 114000,China)

机构地区：[1]辽宁科技大学材料与冶金学院,辽宁鞍山114051 [2]鞍山紫竹科技型钢有限公司,辽宁鞍山114000

出　　处：《辽宁科技大学学报》2021年第2期107-110,共4页Journal of University of Science and Technology Liaoning

基　　金：中信-CBMM铌钢研究与开发基金(D121/M835-2019);辽宁省教育厅重点基金(2019FWDF03);辽宁科技大学优秀青年基金(2019RC10)。

摘　　要：采用扫描电子显微镜、EDS能谱分析仪等手段对国内某厂生产的含铌角钢腿部裂纹的微观组织形貌、化学成分进行分析,发现裂纹在轧制前既已形成,裂纹处存在明显的氧化现象,周边分布了较多的氧化物质点,裂纹内部含有大量的球型氧化物颗粒,边缘存在轻微脱碳现象。结合现场的生产工艺和设备状况,可以采用调配二冷区各段配水量、钛微合金化等手段减少裂纹形成。The microstructures and chemical compositions of a niobium-containing angle steel were analyzed by scanning electron microscope(SEM)and EDS energy spectrum analyzer.The results show that the cracks formed before rolling and exhibited obvious oxidation.There are many oxidized points around the crack,many spherical oxide particles inside the crack,and slight decarburization at the crack edges.Combined with the on-site production process and equipment status,the cracks can be mitigated by adjusting water distribution in each section of the secondary cooling zone and titanium microalloying.

关 键 词：角钢 铌微合金化 裂纹 氧化 

分 类 号：TG335.6[金属学及工艺—金属压力加工]