CSP工艺Q235B钢点状缺陷分析  

Analysis on the Spot Defects of Q235B Steel in CSP Process

作　　者：杨奕[1,2] 刘洋[1] 韩斌[1] 谭文[1] 魏兵[1] 

机构地区：[1]武汉钢铁集团公司研究院,湖北武汉430080 [2]东北大学轧制技术与连轧自动化国家重点实验室,辽宁沈阳110004

出　　处：《物理测试》2014年第5期44-48,共5页Physics Examination and Testing

摘　　要：在CSP产线生产的Q235B钢卷表面发现点状缺陷。通过对点状缺陷进行EPMA、SEM、EDS和金相等分析,并结合现场的轧制工艺情况,对Q235B钢的点状缺陷形成原因进行综合分析。分析结果表明:在加热过程中,较高的C在加热的氧化气氛中易脱碳产生CO、CO2气体,导致表面的氧化铁皮出现起皮现象,除鳞难以改善,在后续的轧制过程中碾压,形成了点状缺陷。During the Q235B steel production of CSP process, the spot defects were founded on the strip surface. Throughthe EPMA, SEM, EDS and metallographic analysis combined with the CSP rolling process, the spot defects formation ofQ235B steel are comprehensively analyzed. The results show that： in the heating process, the higher carbon is easier to de-carbonization in oxidizing atmosphere and produce CO and CO. which cause blister on the surface of oxidation scale. It isdifficult to remove in descaling process. In the rolling process, the blister is rolled and form spot defects.

关 键 词：CSP 热轧板卷 点状缺陷 氧化铁皮 

分 类 号：TG115[金属学及工艺—物理冶金] TG335[金属学及工艺—金属学]