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| CSP生产C-Mn钢薄带组织与表面裂纹研究 | |
| 引用本文： | 张超,宋畅,韩斌,谭佳梅,郭茜,吴润.CSP生产C-Mn钢薄带组织与表面裂纹研究[J].钢铁研究学报,2011,23(5):50-54. |
| 作者姓名： | 张超 宋畅 韩斌 谭佳梅 郭茜 吴润 |
| 作者单位： | 1. 武汉科技大学材料与冶金学院,湖北武汉,430081;武汉钢铁集团公司条材总厂CSP分厂和技术中心,湖北武汉,430081 2. 武汉科技大学材料与冶金学院,湖北武汉,430081 3. 武汉钢铁集团公司条材总厂CSP分厂和技术中心,湖北武汉,430081 |
| 基金项目： | 湖北省自然科学基金资助项目(2008CDB256) |
| 摘 要： | 在武钢CsP生产线上,通过控轧控冷工艺生产低成本低碳C-Mn钢薄板.结果表明,生产出的薄板屈服强度大于313 MPa,抗拉强度高于400MPa,伸长率超过37%,屈强比低于0.83,冷弯性能良好,满足塑性要求,但常出现表面裂纹.从热力学角度分析出尺寸大于83nm的硬脆粒子会引起裂纹,而钢中析出物尺寸约为30nm,不足以... |
| 关 键 词： | CSP 表面裂纹 热力学 混晶 |
Surface Crack Analysis and Microstructure of C-Mn Thin Slab Steel Produced by CSP |
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| ZHANG Chao,SONG Chang,HAN Bin,TAN Jia-mei,GUO Qian,WU Run.Surface Crack Analysis and Microstructure of C-Mn Thin Slab Steel Produced by CSP[J].Journal of Iron and Steel Research,2011,23(5):50-54. | |
| Authors: | ZHANG Chao SONG Chang HAN Bin TAN Jia-mei GUO Qian WU Run |
| Affiliation: | ZHANG Chao1,2,SONG Chang1,HAN Bin2,TAN Jia-mei2,GUO Qian1,WU Run1(1.School of Material Science and Metallurgy Technology,Wuhan University of Science and Technology,Wuhan430081,Hubei,China,2.CSP Factory,Wuhan Iron and Steel Corporation,Wuhan 430081,China) |
| Abstract: | C Mn thin slab steel had been produced at low cost by controlled rolling and cooling method in CSP factory of Wuhan Iron and Steel (Group) Corporation. The mechanical properties of tested steels were measured as: the yield strength of 313MPa, the tensile strength of ≥400MPa and the elongation of ≥37%. The YR was below 083 and ductility was good. However, the surface cracks often appeared. The particles with size of 83nm can cause cracks by thermodynamics analysis, while the particles in the experimental steel was about 30nm, which cannot bring about cracks. Meanwhile, mixed grain was observed in the vicinity of the crack. The stress concentration calculated to be 120MPa, which was more than the strength of the steel rolled by F3 pass, may probably lead to crack. The rate of surfacial crack reduces from 367% to 134% with higher start rolling temperture as well as lower finishing rolling temperture and coiling temperature. |
| Keywords: | CSP surface crack thermodynamics mixed-grain |
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