09CrCuSb钢方坯表面裂纹形成机理及控制实践

doi:10.13228/j.boyuan.issn1005-4006.20220184

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Abstract 09CrCuSb steel is widely used in the manufacturing industry of economizer, heat exchanger and other equipment due to its excellent sulfuric acid dew point corrosion resistance. However, 09CrCuSb steel is prone to surface cracks during continuous casting, which seriously affects the yield, so it becomes an urgent problem to be solved. Through the analysis of metallographic microscope and scanning electron microscope, it was clear that the cause of crack defects under the original process parameters was the precipitation of Cu and proeutectoid ferrite on the grain boundary of the billet surface. By increasing the mold water flow rate from 2 166.67 L/min to 2 666.67 L/min, the mold electromagnetic stirring current from 400 A to 450 A, the specific water volume of the secondary cooling system from 1.10 L/kg to 1.20 L/kg, the casting speed from 2.5 m/min to 3.2 m/min, and applying the thermal insulation device within the range of in and out tension leveler, the precipitation of Cu and proeutectoid ferrite on the grain boundary of the billet surface layer is effectively inhibited. As a result, the excellent surface quality of the billet is obtained, and the qualified rate of magnetic particle flaw detection of rolled round steel is increased from 19.19% to 99.07%. The idea and development practice of 09CrCuSb steel billet crack control provide a new idea for the billet crack control of the same series of low carbon steel containing Cu.

Key words： 09CrCuSb steel billet surface crack Cu precipitation proeutectoid ferrite qualified rate of magnetic particle flaw detection

Received: 25 November 2022

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	Articles by authors
	SHI Weining
	YE Mingzai
	XU Jiyou
	WANG Jun
	WANG Liu
	YUAN Yuan

Cite this article:

SHI Weining,YE Mingzai,XU Jiyou等. Formation mechanism and practical control of surface crack for 09CrCuSb steel billet[J]. CONTINUOUS CASTING, 2023, 42(4): 41-47.

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http://www.chinamet.cn/Jweb_lz/EN/10.13228/j.boyuan.issn1005-4006.20220184 OR http://www.chinamet.cn/Jweb_lz/EN/Y2023/V42/I4/41

[1]	王欣欣, 高义民, 李匡, 等. 稀土钇对09CrCuSb合金耐硫酸腐蚀性能的影响[J]. 西安交通大学学报, 2013, 47(3): 69.
[2]	宋志刚, 丰涵, 吴晓涵,等. 中国双相不锈钢的发展及研究进展[J]. 中国冶金, 2022, 32(6): 2.
[3]	谢建府, 隋亚飞, 邓之勋, 等. 09CrCuSb热轧卷边部缺陷的成因分析[J]. 连铸, 2022(3): 89.
[4]	马立军, 马净, 王成建, 等.天钢抗硫酸露点腐蚀09CrCuSb圆钢的开发[J]. 天津冶金, 2013(21): 27.
[5]	郑文龙. 新型耐硫酸露点用钢——ND钢[J]. 机械工程材料, 1996(3): 46.
[6]	钱余海, 李自刚, 杨阿娜. 低合金耐硫酸露点腐蚀钢的性能和应用[J]. 特殊钢, 2005, 26(5): 30.
[7]	陈子坤, 王启丞, 蔡易辰, 等. 09CrCuSb方坯表面裂纹形成机制分析[J]. 材料装备技术与应用, 2021, 1(4): 83.
[8]	田志鹏, 张勇. 09CrCuSb无缝钢管表面缺陷成因分析[J]. 天津冶金, 2019(4): 52.
[9]	胡海亮, 朱立光, 孙立根, 等. 09CrCuSb钢连铸坯角部裂纹的产生机制与预防措施[J]. 上海金属, 2020, 42(3): 87.
[10]	万秀娟, 沈敏. 耐硫酸露点腐蚀用钢09CrCuSb表面裂纹的原因分析及控制[J]. 宽厚板, 2020, 26(1): 24.
[11]	宋苓芝, 刘志勇. 耐硫酸露点腐蚀用钢09CrCuSb铸坯表面裂纹缺陷的分析与研究[J]. 山西冶金, 2018, 5(41): 25.
[12]	ZHU Y, LI J, XU J. Macroscopic distribution of residual elements As, S, and P in steel strips produced by compact strip production (CSP) Process [J]. Metallurgical and Materials Transactions A, 2012, 43(7): 2509.
[13]	黄小莉. 残留元素As、Sn、Sb的晶界偏聚对连铸钢热塑性的影响[J]. 武汉科技, 2006, 5(2): 21.
[14]	张武, 马玉平, 刘永刚, 等. 耐硫酸露点腐蚀用钢的研究与应用综述[J]. 安徽冶金, 2009(3): 25.
[15]	路坦. 09CrCuSb铸坯表面裂纹成因分析及改进措施[D]. 合肥: 安徽工业大学, 2016.
[16]	杨才福, 苏航, 李丽, 等. Cu、Ni在含铜时效钢表面氧化层中的富集[J]. 钢铁, 2007, 42(4): 57.
[17]	CHEN Y. Formation and control measure of the cracks in the laser welded joint between Ti Ni alloy and stainless steel[J]. Chinese Journal of Lasers, 2010, 37(12): 3168.
[18]	付兵. 钢中残余元素的影响及其控制研究[D]. 武汉: 武汉科技大学, 2010.
[19]	郭震, 赵宇宏, 孙远洋, 等. 相场法研究Fe-Cu-Mn-Al合金富Cu相析出机制[J]. 物理学报, 2021, 70(8): 322.
[20]	张亚彬, 任建斌, 王锦永, 等. S31254超级奥氏体不锈钢析出相演变及微观表征[J]. 中国冶金, 2021, 31(12): 61.
[21]	DESCHAMPS A, MILITZER M, POOLE W J. Precipitation kinetics and strengthening of a Fe-0.8wt%Cu alloy[J]. ISIJ International, 2001, 41(2): 196.
[22]	DESCHAMPS A, MILITZER M, POOLE W J. Comparison of precipitation kinetics and strengthening in an Fe-0.8%Cu alloy and a 0.8 % Cu-containing low-carbon steel[J]. ISIJ International, 2003, 43(11): 1826.
[23]	王建华, 王慧敏, 杨忠民, 等. 超低碳钢连续冷却过程中铜的析出行为[J]. 钢铁研究学报, 2010, 22(10): 39.
[24]	李朋欢, 包燕平, 岳峰, 等. 异常粗大的奥氏体晶粒对表面晶间裂纹的影响[J]. 北京科技大学学报, 2009, 31(增刊1): 177.
[25]	马静超. 板坯非正常角部横裂纹产生原因分析[J].中国冶金, 2021, 31(6): 77.
[26]	胡海亮, 朱立光, 孙立根, 等. 09CrCuSb钢连铸坯的高温力学性能[J]. 钢铁钒钛, 2020, 41(3): 132.
[27]	冯永平, 郑娜, 唐磊, 等. 薄板坯连铸结晶器内钢水凝固传热数值模拟[J]. 连铸, 2021(6): 44.
[28]	孙彪, 刘学华, 梁军, 等. 结晶器电磁搅拌对中碳钢小方坯质量的影响[J]. 连铸, 2015(6): 54.
[29]	白晓路, 张小伟, 李梦飞, 等. 铌微合金化建筑用钢连铸坯角部裂纹控制[J]. 连铸, 2022(2): 61.
[30]	李艳磊, 王南, 孟彩茹,等. 板坯连铸二冷动态配水控制研究[J]. 铸造技术, 2015, 36(1): 141.