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| Analysis of inclusions in cast slab for high-strength engineering machinery steel |
| ZHU Hong-xin1, YANG Xin-long2, WANG Ru-dong1, YU Wei3, CUI Heng1 |
1. Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, China;
2. Gansu Jiugang Steel Group Hongxing Iron and Steel Co., Ltd., Jiayuguan 735100, Gansu, China;
3. National Engineering Research Center for Advanced Rolling and Intelligent Manufacturing, University of Science and Technology Beijing, Beijing 100083, China |
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Abstract In order to understand the source of inclusions in Q550MD cast slab of high-strength engineering machinery steel in a plant, optimize the production process and improve slab quality, the number, size, morphology and composition of inclusions in the cast slab were studied by means of slime extraction, automated SEM-EDS inclusion analysis. The results show that the size of macro inclusions in slime extraction sample is concentrated in 80-140 μm. The shape of inclusion is mostly spherical, and the main component is calcium aluminate. Before forming the final composite inclusions, the macro inclusions in the cast slab come from the ladle, and the mold flux entrapment may occur. The inclusion aggregation is found at 1/4 position in the width direction of cast slab, and the number of inclusions is significantly higher than that at the edge and 1/2 position, which is related to the unreasonable flow field of the mold.
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Received: 04 January 2022
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| [1] |
王皓, 包燕平, 王敏, 等. 夹杂物对厚规格X80热轧钢带DWTT性能的影响[J]. 工程科学学报, 2018, 40(增刊1):1.
|
| [2] |
宋朝琦, 刘威, 杨树峰. 等 QD08钢中Ds类夹杂物形成原因及控制[J]. 钢铁, 2021, 56(12):68.
|
| [3] |
刘彭, 隋亚飞, 徐刚军, 等. 低碳钢夹杂物产生原因及控制[J]. 钢铁, 2020, 55(2):67.
|
| [4] |
高帅, 王敏, 郭建龙, 等. IF钢铸坯厚度方向夹杂物分布及洁净度评估[J]. 工程科学学报, 2020, 42(2):194.
|
| [5] |
YANG Z, ZHANG J, LI S, et al. On the critical inclusion size of high strength steels under ultra-high cycle fatigue[J]. Materials Science and Engineering A, 2006, 427(1/2):167.
|
| [6] |
汤伟, 孟令涛, 孙利斌, 等. Q235B钢连铸板坯中间裂纹成因分析及改进措施[J]. 连铸, 2017(5): 7.
|
| [7] |
王立峰, 王新华, 张炯明, 等. 控制高碳钢中CaO-Al2O3-SiO2类夹杂物成分的实验研究[J].钢铁, 2004, 39(1): 3.
|
| [8] |
徐国军, 胡华东, 田川, 等. Al2O3夹杂在DC06钢中的分布及对深冲性能的影响[J]. 中国冶金, 2021, 31(5):111.
|
| [9] |
印传磊, 翟万里, 蒋栋初, 等. 42CrMo钢大尺寸夹杂物的来源与控制[J]. 中国冶金, 2021, 31(1):36.
|
| [10] |
龙鹄, 成国光, 丘文生, 等. 轴承钢中大尺寸夹杂物的特征、来源及改进工艺[J]. 中国冶金, 2020, 30(9):53.
|
| [11] |
李璟宇, 成国光, 钱国余, 等. 304不锈钢热(冷)轧板表面线缺陷[J]. 中国冶金, 2017, 27(1):29.
|
| [12] |
CHI Y, DENG Z, ZHU M. Effects of refractory and ladle glaze on evolution of non-metallic Inclusions in Al-killed steel[J]. Steel Research International, 2017, 88(9): 1600470.
|
| [13] |
邓志银, 朱苗勇. 合金钢中MnO/FeO大型夹杂物来源分析[J]. 钢铁, 2018, 53(2):27.
|
| [14] |
杨锋功, 邓志银, 马玉强, 等. 轴承钢铸坯中大型夹杂物来源分析[J]. 钢铁研究学报, 2018, 30(7):536.
|
| [15] |
杨鹤, 王洋, 崔衡. 非稳态浇铸条件下IF钢铸坯中大型夹杂物分析[J]. 连铸, 2017(2):39.
|
| [16] |
刘延强, 王丽君, 郭俊波, 等. 高铁扣件弹簧钢中夹杂物的非水溶液电解分析及其控制[J]. 炼钢, 2013, 29(3): 53.
|
| [17] |
尚德礼, 王习东, 王国承, 等. 无损伤提取分析钢中非金属夹杂物的实验研究[J]. 冶金标准化与质量, 2005(1):28.
|
| [18] |
尚德礼, 王国承, 吕春风, 等. 连铸小板坯夹杂物来源与控制[J]. 炼钢, 2007, 23(2):11.
|
| [19] |
蔡开科. 连铸坯质量控制[M]. 北京:冶金工业出版社, 2010.
|
| [20] |
WANG H, LI J, SHI C, et al. Formation and evolution of non-metallic inclusions in calcium treatment H13 steel during electroslag remelting rrocess[J]. ISIJ International, 2019, 59(5):828.
|
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2022, Vol. 32 
