微合金化钢连铸坯角部横裂纹形成机制

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摘要为研究微合金钢连铸坯角部横裂纹缺陷形成机制问题，从理论上研究了连铸过程第二相粒子的析出行为，并在板坯连铸生产中进行“卧坯”试验。研究结果表明：X65管线钢中碳氮化钛、碳氮化铌、氮化铝的开始析出温度分别为1508、1123、1165℃，析出峰值温度分别为1360、870和840℃；“卧坯”试验发现结晶器内及垂直段无裂纹，在距弯月面3270mm处，即对应于弯曲开始后710mm开始出现多处外弧横裂纹，而弧形段内无内弧裂纹，在弯曲段铸坯角部温度处于钢的第Ⅲ脆性区，同时外弧受拉应力，这是造成外弧角横裂产生的主要原因。

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	王明林

关键词 ：板坯, 角横裂, 第二相析出, 高温延展性

Abstract：In order to research the formation mechanism of transverse corner crack on micro-alloyed steel slab, the precipitation behaviors of the second phase particles during the continuous casting process were investigated, and the industrial trial of stagnant slab were carried out. The calculation results show that the beginning precipitation temperature of titanium carbonitride, niobium carbonitride, aluminum nitride in X65 pipeline steel are 1508, 1123, 1165℃ respectively. And the precipitation peak temperatures are 1360, 870, 840℃. Results of stagnant slab test show that no crack appeared in mold and vertical segments. But at 3270mm away from the meniscus, that is 710mm after bending, transverse crack begins to appear at outer arc surface. No crack in inner arc surface appears. The slab corner temperature at bending part is in the steel brittle temperature zone and under the tensile stress at the same time, which is the main cause for the appearance of transverse corner crack at outer arc surface.

收稿日期: 2012-03-21 出版日期: 2012-10-30

引用本文:

王明林，杨春政，陶红标，张慧，刘建华，吴夜明. 微合金化钢连铸坯角部横裂纹形成机制[J]. 钢铁, 2012, 47(10): 27-33. WANG Ming-lin1,YANG Chun-zheng2,TAO Hong-biao1,ZHANG Hui1,LIU Jian-hua2,WU Ye-ming1. Formation Mechanism of Transverse Corner Crack on Micro-Alloyed Steel Slab. Iron and Steel, 2012, 47(10): 27-33.

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http://www.chinamet.cn/Jweb_gt/CN/ 或 http://www.chinamet.cn/Jweb_gt/CN/Y2012/V47/I10/27

[1]	赵沛, 王新华, 吴世培, 等. 宝钢(GR)SS41连铸坯角横裂成因的研究[J]. 钢铁,1996, 31(2)：21.
[1]	赵沛, 王新华, 吴世培, 等. 宝钢(GR)SS41连铸坯角横裂成因的研究[J]. 钢铁,1996, 31(2)：21.
[2]	王新华，王文军，刘新宇，等.减少含铌、钒、钛微合金化钢连铸板坯角横裂纹的研究[J].钢铁，1998，33(1):22.
[2]	王新华，王文军，刘新宇，等.减少含铌、钒、钛微合金化钢连铸板坯角横裂纹的研究[J].钢铁，1998，33(1):22.
[3]	职建军. 宝钢连铸板坯角横裂缺陷的改善[J]. 钢铁, 2001, 36(1): 22.
[3]	职建军. 宝钢连铸板坯角横裂缺陷的改善[J]. 钢铁, 2001, 36(1): 22.
[4]	陈永，杨素波，朱苗勇. 攀钢低合金钢板坯角横裂缺陷的控制技术[J]. 钢铁钒钛,2009，29(3): 55.
[4]	陈永，杨素波，朱苗勇. 攀钢低合金钢板坯角横裂缺陷的控制技术[J]. 钢铁钒钛,2009，29(3): 55.
[5]	林建农，马富昌，赵向政. 铌、钒、钛微合金化钢的边角裂纹与高温延塑性[J]. 北京科技大学学报，2007，29（增刊1）：118.
[5]	林建农，马富昌，赵向政. 铌、钒、钛微合金化钢的边角裂纹与高温延塑性[J]. 北京科技大学学报，2007，29（增刊1）：118.
[6]	D.N.克劳瑟. 微合金化元素对连铸裂纹的影响[J]. 钢铁钒钛，2002，23（1）：64.
[6]	D.N.克劳瑟. 微合金化元素对连铸裂纹的影响[J]. 钢铁钒钛，2002，23（1）：64.
[7]	H.G.Suzuki, S.Nishimura, Y.Nakamuma. Embrittlement of steels occurring in the temperature range from 1000 to 600℃[J]. Transactions ISIJ, 1984, 24(3):169
[7]	H.G.Suzuki, S.Nishimura, Y.Nakamuma. Embrittlement of steels occurring in the temperature range from 1000 to 600℃[J]. Transactions ISIJ, 1984, 24(3):169
[8]	T. Revaux, P. Deprez, J. P. Bricout et al. In situ solidified hot tensile test and hot ductility of some plane carbon steels and microalloyed steels[J]. ISIJ Int., 1994,34(6):528.
[8]	T. Revaux, P. Deprez, J. P. Bricout et al. In situ solidified hot tensile test and hot ductility of some plane carbon steels and microalloyed steels[J]. ISIJ Int., 1994,34(6):528.
[9]	陈家祥. 炼钢常用图表数据手册[M]. 北京：冶金工业出版社，2010.
[9]	陈家祥. 炼钢常用图表数据手册[M]. 北京：冶金工业出版社，2010.
[10]	Irvine K J, Pickering F B, Gladman T. Grain Refined C-Mn Steels[J]. JISI. 1967, 205: 161
[10]	Irvine K J, Pickering F B, Gladman T. Grain Refined C-Mn Steels[J]. JISI. 1967, 205: 161
[11]	Mclean A, Kay D A R. Control of Inclusions in HSLA Steels[C]//. Korchynsky M. eds, Microalloying’ 75. New York: Union Carbides Corporation, 1976: 215
[11]	Mclean A, Kay D A R. Control of Inclusions in HSLA Steels[C]//. Korchynsky M. eds, Microalloying’ 75. New York: Union Carbides Corporation, 1976: 215
[12]	Hoogendoorn T M, Spanraft M J. Quantifying the Effect of Microalloying Elements on Structures During Processing[C]//. Korchynsky M. Microalloying’ 75. New York: Union Carbides Corporation, 1976: 75
[12]	Hoogendoorn T M, Spanraft M J. Quantifying the Effect of Microalloying Elements on Structures During Processing[C]//. Korchynsky M. Microalloying’ 75. New York: Union Carbides Corporation, 1976: 75
[13]	Nordberg H, Aronsson B. Solubility of Niobium Carbide in Austenite[J]. JISI, 1968, 12: 1263
[13]	Nordberg H, Aronsson B. Solubility of Niobium Carbide in Austenite[J]. JISI, 1968, 12: 1263
[14]	E.T.Turkdogan. Causes and Effects of Nitride and Carbonitride Precipitation During Continuous Casting[J]. ISS Transactions. 1990, (11): 39
[14]	E.T.Turkdogan. Causes and Effects of Nitride and Carbonitride Precipitation During Continuous Casting[J]. ISS Transactions. 1990, (11): 39
[15]	B.Mintz. The influence of composition on the hot ductility of steels and the problem of transverse cracking[J]. ISIJ Internaitonal, 1999, 39(9):833
[15]	B.Mintz. The influence of composition on the hot ductility of steels and the problem of transverse cracking[J]. ISIJ Internaitonal, 1999, 39(9):833
[16]	Abusbosa R, Vipond R, Mintz B. Influence of sulphur and niobium on hot ductility o as cast steels[J]. Mat. Sci and Technol., 1991, 7: 1101
[16]	Abusbosa R, Vipond R, Mintz B. Influence of sulphur and niobium on hot ductility o as cast steels[J]. Mat. Sci and Technol., 1991, 7: 1101
[17]	Commineli O Abushosa T and Mintz B. Influence of titanium and nitrogen on hot ductility of C-Mn-Nb-Al steels[J]. Mat. Sci. and Technol., 1999,15: 1058
[17]	Commineli O Abushosa T and Mintz B. Influence of titanium and nitrogen on hot ductility of C-Mn-Nb-Al steels[J]. Mat. Sci. and Technol., 1999,15: 1058