|
|
Design characteristics and production practice of bloom caster for special steel |
LI Hao, LI Xin, TAO Cheng-gang, WANG Guo-cai |
Special Steel Company, Ma’anshan Iron and Steel Co., Ltd., Ma’anshan 243000, Anhui, China |
|
|
Abstract The core process and key equipment of special steel bloom caster in a plant was discussed, the key equipment, technical points and process practice of controlling slab quality were expounded, emphatically described the important role of light and heavy reduction process in improving the internal quality of bloom, and introduced in detail the metallurgical effect of the caster in producing typical high carbon steel. The production practice shown that the central segregation of bearing steel can be significantly reduced, the central porosity can be improved and the central shrinkage can be eliminated by determining the reasonable soft and hard reduction interval and reduction process parameters under the condition of keeping the production drawing speed constant. The typical steel GCr15 produced by bloom caster was poured at a constant casting speed, the carbon segregation index of billet was between 0.97-1.06, the proportion of central porosity not greater than 1.0 is 100%, and there was no central shrinkage defect.
|
Received: 31 October 2022
|
|
|
|
[1] |
陈亮,宋波,陈天明,等.45钢连铸大方坯中心疏松与缩孔控制[J].钢铁,2018,53(8):49.
|
[2] |
周晨阳, 黄军, 张亚竹, 等. 大方坯连铸结晶器水口优化模拟探究[J]. 连铸, 2023(1): 97.
|
[3] |
林鹏, 张洪才, 左辉, 等. 包晶钢15CrMoG方坯表面缺陷分析与改进[J]. 连铸, 2023(1): 61.
|
[4] |
眭志松, 康欣蕾, 韩德飞, 等. 220方低碳合金钢铸坯质量提升的实践[J]. 连铸, 2022(5): 108.
|
[5] |
张小伟, 白晓路, 石磊, 等. SWRH72B-S绞线钢连铸小方坯凝固温度场数值模拟[J]. 连铸, 2023(1): 18.
|
[6] |
卢盛意.连铸坯质量[M].北京:冶金工业出版社,2000.
|
[7] |
叶德新,曾令宇,丘文生,等.大方坯连铸轻压下工艺技术开发与应用[J].连铸,2020(4):17.
|
[8] |
朱苗勇,祭程.连铸大方坯凝固末端重压下技术及其应用[C]//第六届宝钢学术年会论文集.上海:宝钢,2015.
|
[9] |
王博.重压下铸坯制过程中内部缺陷演变行为的研究[D]. 北京:北京科技大学,2017.
|
[10] |
陈亮,宋波,陈天明,等.320 mm×410 mm 大方坯连铸重轨钢质量改进与应用[J]. 钢铁,2017,52(4):32.
|
[11] |
邹冰梅. 中心偏析与中心疏松的形成与预防[J]. 钢铁技术,2005(2):3.
|
[12] |
刘宝喜,高彩茹,郑文超,等.高韧性桥梁钢Q420D 的开发[J].中国冶金,2018,28(2):67.
|
[13] |
宗男夫,张慧,张兴中.国内外高品质轴承钢洁净化与均质化控制技术的进展[J]. 轴承,2017(1):48.
|
[14] |
LUTY W. Oxygen as a criterion to assess the degree of purity and the resistance to pitting of antifriction bearing steel [J].Archiv Für Das Eisenhüttenwesen,1971,42:49.
|
[15] |
ECKEL J A,GLAWAS P C,WOLFE J O,et al. Clean engineered steels-progress at the end of the 20th century[C]//Advances in Production and Use of Steel with Improved Internal Cleanliness. Pennsylvania(USA): ASTM,1999:1.
|
[16] |
UNIGAME Y,HIRAOKA K,TAKASU I,et al. Evaluation procedures of nonmetallic inclusion in steel for highly reliable bearings [J].Journal of ASTM International,2006,3(5):34。
|
[17] |
罗家英,朱祖昌.我国轴承钢的现状与发展概况[J].热处理,2002,17(3):44.
|
[18] |
何建国, 邓安元, 许秀杰, 等. 电磁搅拌宽厚板结晶器内钢液流动和液面波动[J]. 连铸, 2022(4): 50.
|
[19] |
汪国才,李浩,陶承岗,等.连铸圆坯表面纵裂原因及控制措施[J].炼钢,2020,36(2):57.
|
[20] |
程常桂,邓康,任忠鸣,等. 连铸坯振痕的形成机理及控制技术的发展[J]. 炼钢,2000,16(5):55.
|
[21] |
周青峰,马建超,王敏花,等. 高碳钢小方坯粘结漏钢形成原因分析与控制[J]. 炼钢,2015,31(2):68.
|
[22] |
王雅贞.连续铸钢工艺及设备[M].北京.冶金工业出版社,2014.
|
[23] |
梁兆华,姚桢,李全智,等. 高碳钢小方坯裂纹形成机理及控制措施[J].金属材料与冶金工程,2011,39(3):29.
|
[24] |
朱宝晶,陶务纯.连铸二冷水的气-水平衡分析[J].冶金丛刊,2009(6):1.
|
[25] |
吴国庆.方坯连铸二次冷却计算机辅助分析[C]//第十五届全国炼钢学术会议论文集.北京:中国金属学会,2008:444.
|
[26] |
蔡开科,陈士福.连铸铸钢原理与工艺[M].北京:冶金工业出版社,2010:12.
|
[27] |
潘鹏, 侯栋, 戈文英, 等. 连铸坯凝固末端电磁搅拌位置及连铸工艺优化[J]. 连铸, 2022(2): 66.
|
[28] |
王波,陈列,张旭,等.特殊钢连铸大方坯末端电磁搅拌位置研究与应用[J].连铸,2016(5):19.
|
[29] |
蔡开科.连铸坯质量控制[M].北京:冶金工业出版社,2010.
|
[30] |
吴国庆,邱明罡,代宗岭,等. 现代合金钢大方坯连铸机设计特点及生产实践[J].钢铁,2018,53(12):58.
|
[1] |
YU Zheng, REN Ying, REN Qiang, ZHANG Lifeng. Effect of magnesium on inclusions and austenite grain in a GCr15 bearing steel[J]. Iron and Steel, 2023, 58(7): 133-143. |
[2] |
ZHANG Jian-bin, XU Jian-fei, WANG Kun-peng, WANG Ying, YANG Pu, CHEN Ting-jun. Formation mechanism of MgO·Al2O3 inclusions in GCr15 steel in continuous casting[J]. Iron and Steel, 2023, 58(5): 83-91. |
[3] |
LI Da-ming, LIN Jun, HE Jia-jia, DENG Xiang-yang, WU Wei, PANG Zhuo-chun. Development practice of the soft reduction process in mild steel con-casting[J]. CONTINUOUS CASTING, 2023, 42(2): 52-56. |
[4] |
HAN Jie, WANG Yi, LIU Cheng-bao, XU Rong-chang, SUN Zong-hui, LUAN Yi-kun. Analysis on modification behavior of rare earth to inclusions in GCr15 bearing steel[J]. CONTINUOUS CASTING, 2023, 42(2): 70-77. |
[5] |
ZHANG Ya-bing, WANG Dong-xing, ZHAO Li, ZUO Xiao-tan, HUANG Yan, YANG Wei-yong. Solute distribution of 35CrMnSi structural alloy steel billet under the effect of PMO[J]. CONTINUOUS CASTING, 2023, 42(2): 78-83. |
[6] |
WANG Quan,ZHANG Jiongming,MA Haitao,YIN Yanbin. Optimization of soft reduction process for 160mm×160mm bearing steel continuous casting billets[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2023, 35(1): 52-59. |
|
|
|
|