| 40Cr棒材表面纵裂缺陷的研究 |
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| 引用本文： | 袁建路,李文兴,牛士珍,冯捷.40Cr棒材表面纵裂缺陷的研究[J].钢铁,2006,41(4):36-39. |
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| 作者姓名： | 袁建路 李文兴 牛士珍 冯捷 |
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| 作者单位： | 河北工业职业技术学院材料系,河北,石家庄,050091;石家庄钢铁集团公司技术中心,河北,石家庄,050031;河北科技大学材料科学与工程学院,河北,石家庄,050018 |
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| 摘 要： | 经过对石钢生产中产生表面纵裂的40Cr圆钢进行取样、检验和分析发现,裂纹内残存物含有与连铸保护渣相同的特征元素,结合工艺过程,初步探明石钢生产该圆钢产生表面纵裂的原因是由于轧钢时应用表面带有粘渣或裂纹的铸坯.而杜绝铸坯表面粘渣和裂纹除优化浇铸工艺参数、稳定浇铸过程外,选择粘度小、熔点低、熔速快等合适理化性能指标的保护渣至关重要.
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| 关 键 词： | 40Cr 表面裂纹 保护渣 |
| 文章编号： | 0449-749X（2006）04-0036-04 |
| 修稿时间： | 2005-07-02 |
Research on Longitudinal Surface Cracking of 40Cr Bar |
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| YUAN Jian-lu,LI Wen-xing,NIU Shi-zhen,FENG Jie.Research on Longitudinal Surface Cracking of 40Cr Bar[J].Iron & Steel,2006,41(4):36-39. |
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| Authors: | YUAN Jian-lu LI Wen-xing NIU Shi-zhen FENG Jie |
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| Affiliation: | 1. Department of Material, Hebei Institute of Vocation and Technology, Shijiazhuang 050091, Hebei, China; 2. Technical Center, Shijiazhuang Iron and Steel Group Co. , Shijiazhuang 050031, Hebei, China; 3. College of Material Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, Hebei, China |
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| Abstract: | By sampling, examining and analyzing of 40Cr bars with longitudinal surface cracks taken in the second rolling mill of Shijiazhuang Steel, it was found that the slag remains in the cracks have the same elements as the mould powder. Combining with the study of technical process, it can be concluded that the longitudinal surface cracking in the bar is caused by viscous slag and cracks on billet surface. It is important for eliminating viscous slag and cracks on billet surface to select the proper mould powder with proper physical chemical properties including littie viscosity and low melting point and high smelting rate, and optimize casting technological parameters and stabilize casting process. |
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| Keywords: | 40Cr surface crack mould powder |
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