化学成分和控冷工艺对连续油管用钢带状组织的影响研究
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摘要
为了提高CT80连续油管的抗酸性能,对CT80钢带状组织和微区化学成分偏析进行了分析,研究了带状组织与微区化学成分偏析的对应关系及C含量和控冷工艺对带状组织的影响。结果表明,微区化学成分偏析是导致带状组织形成的根本原因;降低C含量或卷取温度,均可抑制CT80钢带状组织形成;当w (C)低至0.05%、卷取温度低至530℃时,带状组织基本消除, CT80钢抗酸性能良好。
In order to improve the acid resistance of CT80 coiled tubing, the banded microstructure and micro-area chemical component segregation of CT80 steel were analyzed, the relationship between banded microstructure and micro-area chemical component segregation and the effects of C content and cooling process on banded microstructure were studied. The results showed that micro-area chemical component segregation was the root cause of the formation of banded microstructure;reduction of C content or coiling temperature could inhibit the formation of CT80 steel banded microstructure; when the C content was as low as 0.05%, and the coiling temperature as low as 530 ℃, the banded microstructure was basically eliminated and the acid resistance of CT80 steel was good.
In order to improve the acid resistance of CT80 coiled tubing, the banded microstructure and micro-area chemical component segregation of CT80 steel were analyzed, the relationship between banded microstructure and micro-area chemical component segregation and the effects of C content and cooling process on banded microstructure were studied. The results showed that micro-area chemical component segregation was the root cause of the formation of banded microstructure;reduction of C content or coiling temperature could inhibit the formation of CT80 steel banded microstructure; when the C content was as low as 0.05%, and the coiling temperature as low as 530 ℃, the banded microstructure was basically eliminated and the acid resistance of CT80 steel was good.
引文
[1]李建军,毕宗岳. CT80连续油管抗HIC性能试验研究[J].焊管, 2012, 35(4):10-14.
[2]孙娈芬,杜则裕,李桂芝,等.带状组织对管线钢抗氢诱发开裂(HIC)性能的影响[J].焊接技术, 2004, 33(6):13-14.
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[5]彭先华.不同微观结构管线钢氢致开裂(HIC)行为研究[D].武汉:武汉科技大学, 2013.
[6]周琦,季根顺,杨瑞成,等.管线钢中带状组织与氢致开裂[J].兰州理工大学学报, 2002, 28(2):30-33.
[7] OFFERMAN S E, DIJK N H V, REKVELDT M T, et al. Ferrite/pearlite band formation in hot rolled medium carbon steel[J]. Metal Science Journal, 2002, 18(3):297-303.
[8] CARRARD M, GREMAUD M, ZIMMERMANN M, et al. About the banded structure in rapidly solidified dendritic and eutectic alloys[J]. Acta Metallurgica et Materialia, 1992, 40(5):983-996.
[9] KREBS B, GERMAIN L, HAZOTTE A, et al. Banded structure in Dual Phase steels in relation with the austenite-to-ferrite transformation mechanisms[J]. Journal of Materials Science, 2011, 46(21):7026-7038.
[10] GROSSTERLINDEN R, KAWALLA R, LOTTER U,et al. Formation of pearlitic banded structures in ferritic-pearlitic steels[J]. Steel Research, 2016, 63(8):331-336.
[11]倪满森.连铸坯的中心偏析问题[J].连铸, 2001(6):24-26.
[12]梁文,吴润,黄海娥,等.碳含量对600 MPa级高强钢中心偏析和带状组织的影响[J].钢铁钒钛, 2018, 39(3):154-162.
[13]冯光宏,李岩,戴蓓蓉,等.在未再结晶区大压下后加速冷却工艺对钢板带状组织的影响[J].钢铁研究学报, 1999(6):14-17.
[14]蔡珍,黄运华,张跃,等.冷却速度对铁素体-珠光体带状组织的影响机制[J].钢铁研究学报, 2012, 24(6):25-30.
[15]范建文,谢瑞萍,张维旭,等.普通C-Mn钢超细晶中厚板的带状组织[J].钢铁, 2004, 39(8):100-104.
[2]孙娈芬,杜则裕,李桂芝,等.带状组织对管线钢抗氢诱发开裂(HIC)性能的影响[J].焊接技术, 2004, 33(6):13-14.
[3] PARK G T, KOH S U, JUNG H G, et al. Effect of microstructure on the hydrogen trapping efficiency and hydrogen induced cracking of linepipe steel[J]. Corrosion Science, 2008, 50(7):1867-1871.
[4] CHAWLA K K, RIGSBEE J M, WOODHOUSE J B.Hydrogen-induced cracking in two linepipe steels[J].Journal of Materials Science, 1986, 21(11):3777-3782.
[5]彭先华.不同微观结构管线钢氢致开裂(HIC)行为研究[D].武汉:武汉科技大学, 2013.
[6]周琦,季根顺,杨瑞成,等.管线钢中带状组织与氢致开裂[J].兰州理工大学学报, 2002, 28(2):30-33.
[7] OFFERMAN S E, DIJK N H V, REKVELDT M T, et al. Ferrite/pearlite band formation in hot rolled medium carbon steel[J]. Metal Science Journal, 2002, 18(3):297-303.
[8] CARRARD M, GREMAUD M, ZIMMERMANN M, et al. About the banded structure in rapidly solidified dendritic and eutectic alloys[J]. Acta Metallurgica et Materialia, 1992, 40(5):983-996.
[9] KREBS B, GERMAIN L, HAZOTTE A, et al. Banded structure in Dual Phase steels in relation with the austenite-to-ferrite transformation mechanisms[J]. Journal of Materials Science, 2011, 46(21):7026-7038.
[10] GROSSTERLINDEN R, KAWALLA R, LOTTER U,et al. Formation of pearlitic banded structures in ferritic-pearlitic steels[J]. Steel Research, 2016, 63(8):331-336.
[11]倪满森.连铸坯的中心偏析问题[J].连铸, 2001(6):24-26.
[12]梁文,吴润,黄海娥,等.碳含量对600 MPa级高强钢中心偏析和带状组织的影响[J].钢铁钒钛, 2018, 39(3):154-162.
[13]冯光宏,李岩,戴蓓蓉,等.在未再结晶区大压下后加速冷却工艺对钢板带状组织的影响[J].钢铁研究学报, 1999(6):14-17.
[14]蔡珍,黄运华,张跃,等.冷却速度对铁素体-珠光体带状组织的影响机制[J].钢铁研究学报, 2012, 24(6):25-30.
[15]范建文,谢瑞萍,张维旭,等.普通C-Mn钢超细晶中厚板的带状组织[J].钢铁, 2004, 39(8):100-104.