控轧控冷工艺对L415M管线钢组织性能的影响
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摘要
在不同的控轧控冷工艺下开展L415M管线钢的试制,分析不同工艺条件下L415M管线钢的显微组织和力学性能。结果表明:增加中间坯厚度、降低精轧入口温度、适当降低卷取温度均有利于减少混晶组织,细化铁素体组织,提高落锤冲击性能。根据试验结果确定了L415M管线钢较优的控轧控冷工艺为:精轧入口温度≤1020℃,中间坯厚度≤60 mm,卷取温度≤620℃,在设备能力范围内,增加精轧后三机架未再结晶区变形量。
Effects of different control cooling and control cooling process on microstructure and mechanical properties of pipeline steel L415 M were studied and analyzed through industrial test. The results show that with the increasing of the thickness of intermediate billet and the reducing of the inlet temperature of finish rolling and coiling temperature,mixed crystal in microstructure is restrained and ferrite grains are refined,and the DWTT( Drop weight tear test) impact property is improved. In the end,the suggest control rolling and control cooling process of the pipeline steel L415 M is carried out as follows: inlet temperature should be controlled within 1020 ℃,thickness of intermediate billet within 60 mm,and coiling temperature within 620 ℃,and the non-recrystallization zone deformation of the last three frame of finishing rolling increased within the capacity of the equipment.
Effects of different control cooling and control cooling process on microstructure and mechanical properties of pipeline steel L415 M were studied and analyzed through industrial test. The results show that with the increasing of the thickness of intermediate billet and the reducing of the inlet temperature of finish rolling and coiling temperature,mixed crystal in microstructure is restrained and ferrite grains are refined,and the DWTT( Drop weight tear test) impact property is improved. In the end,the suggest control rolling and control cooling process of the pipeline steel L415 M is carried out as follows: inlet temperature should be controlled within 1020 ℃,thickness of intermediate billet within 60 mm,and coiling temperature within 620 ℃,and the non-recrystallization zone deformation of the last three frame of finishing rolling increased within the capacity of the equipment.
引文
[1]李晓刚,杜翠薇,董超芳,等. X70钢的腐蚀行为与试验研究[M].北京:科学出版社,2006:1-2.
[2]Hiroyuki M,Naoto H,Tomoki M. Tensile properties and microstructure of weld metal of X80 steel[J]. Materials Science Forum,2003,426-432:4013-4018.
[3]丁文华,李淼泉.合金元素和控轧控冷工艺在管线钢研制中的应用[J].材料导报,2007,21(9):67-70.Ding Wenhua,Li Miaoquan. Application of alloy elements and thermo mechanical control process in trial production of pipeline steel[J].Materials Review,2007,21(9):67-70.
[4]孙孝男,尹绍江. X65高强高韧性管线钢的试制[J].金属热处理,2010,35(3):88-91.Sun Xiaonan,Yin Shaojiang. Trial production of X65 pipeline steel with high strength and toughness[J]. Heat Treatment of Metals,2010,35(3):88-91.
[5]冯运莉,丁润江,万德成,等.热轧工艺对X65管线钢的组织与性能的影响[J].金属热处理,2009,34(6):67-71.Feng Yunli,Ding Runjiang,Wan Decheng,et al. Effect of hot rolled process on microstructure and properties of X65 pipeline steel[J]. Heat Treatment of Metals,2009,34(6):67-71.
[6]江海涛,康永林,梁正伟. X65管线钢的模拟炉卷轧制工艺研究与组织性能[J].钢铁,2006,41(4):51-55.Jiang Haitao,Kang Yonglin,Liang Zhengwei. Structure and properties of simulation rolled X65 pipeline steel on steckel mill[J]. Iron and Steel,2006,41(4):51-55.
[7]李国宝,徐洪庆,彭海红.管线钢落锤冲击性能的影响因素分析[J].宽厚板,2006,12(6):5-8.Li Guobao, Xu Hongqing, Peng Haihong. Analyzing of factors influencing DWTT performance on pipeline steel[J]. Wide and Heavy Plate,2006,12(6):5-8.
[8]孙莹,于庆波.多边形铁素体含量对X60、X70管线钢DWTT断口纤维率的影响[J].材料热处理学报,2014,35(3):105-110.Sun Ying, Yu Qingbo. Effect of polygonal ferrite on shear-area percentage of DWTT fracture of pipeline steels X60 and X70[J].Transactions of Materials and Heat Treatment,2014,35(3):105-110.
[9]赵明纯,单以银,曲锦波,等.控轧控冷工艺对X60管线钢组织及力学性能的影响[J].金属学报,2001,37(2):179-183.Zhao Mingchun,Shan Yiyin,Qu Jinbo,et al. Effect of thermo-mechanical control process on microstructure and mechanical properties of X60 pipeline steel[J]. Acta Metallurgica Sinica,2001,37(2):179-183.
[10]张红梅,许云波,刘振宇,等.控制冷却对管线钢X65组织细化与性能的影响[J].东北大学学报,2007,28(3):349-352.Zhang Hongmei,Xu Yunbo,Liu Zhenyu,et al. Effect of controlled cooling on microstructure refinement and mechanical properties of pipeline steel X65[J]. Journal of Northeastern University,2007,28(3):349-352.
[11]赵莉萍,庞在广,麻永林.微量Nb对低碳低合金管线钢相变的影响[J].金属热处理,2008,33(9):95-98.Zhao Liping,Pang Zaiguang,Ma Yonglin. Effects of Nb on phase transformation of the low carbon and low alloy pipeline steel[J]. Heat Treatment of Metals,2008,33(9):95-98.
[2]Hiroyuki M,Naoto H,Tomoki M. Tensile properties and microstructure of weld metal of X80 steel[J]. Materials Science Forum,2003,426-432:4013-4018.
[3]丁文华,李淼泉.合金元素和控轧控冷工艺在管线钢研制中的应用[J].材料导报,2007,21(9):67-70.Ding Wenhua,Li Miaoquan. Application of alloy elements and thermo mechanical control process in trial production of pipeline steel[J].Materials Review,2007,21(9):67-70.
[4]孙孝男,尹绍江. X65高强高韧性管线钢的试制[J].金属热处理,2010,35(3):88-91.Sun Xiaonan,Yin Shaojiang. Trial production of X65 pipeline steel with high strength and toughness[J]. Heat Treatment of Metals,2010,35(3):88-91.
[5]冯运莉,丁润江,万德成,等.热轧工艺对X65管线钢的组织与性能的影响[J].金属热处理,2009,34(6):67-71.Feng Yunli,Ding Runjiang,Wan Decheng,et al. Effect of hot rolled process on microstructure and properties of X65 pipeline steel[J]. Heat Treatment of Metals,2009,34(6):67-71.
[6]江海涛,康永林,梁正伟. X65管线钢的模拟炉卷轧制工艺研究与组织性能[J].钢铁,2006,41(4):51-55.Jiang Haitao,Kang Yonglin,Liang Zhengwei. Structure and properties of simulation rolled X65 pipeline steel on steckel mill[J]. Iron and Steel,2006,41(4):51-55.
[7]李国宝,徐洪庆,彭海红.管线钢落锤冲击性能的影响因素分析[J].宽厚板,2006,12(6):5-8.Li Guobao, Xu Hongqing, Peng Haihong. Analyzing of factors influencing DWTT performance on pipeline steel[J]. Wide and Heavy Plate,2006,12(6):5-8.
[8]孙莹,于庆波.多边形铁素体含量对X60、X70管线钢DWTT断口纤维率的影响[J].材料热处理学报,2014,35(3):105-110.Sun Ying, Yu Qingbo. Effect of polygonal ferrite on shear-area percentage of DWTT fracture of pipeline steels X60 and X70[J].Transactions of Materials and Heat Treatment,2014,35(3):105-110.
[9]赵明纯,单以银,曲锦波,等.控轧控冷工艺对X60管线钢组织及力学性能的影响[J].金属学报,2001,37(2):179-183.Zhao Mingchun,Shan Yiyin,Qu Jinbo,et al. Effect of thermo-mechanical control process on microstructure and mechanical properties of X60 pipeline steel[J]. Acta Metallurgica Sinica,2001,37(2):179-183.
[10]张红梅,许云波,刘振宇,等.控制冷却对管线钢X65组织细化与性能的影响[J].东北大学学报,2007,28(3):349-352.Zhang Hongmei,Xu Yunbo,Liu Zhenyu,et al. Effect of controlled cooling on microstructure refinement and mechanical properties of pipeline steel X65[J]. Journal of Northeastern University,2007,28(3):349-352.
[11]赵莉萍,庞在广,麻永林.微量Nb对低碳低合金管线钢相变的影响[J].金属热处理,2008,33(9):95-98.Zhao Liping,Pang Zaiguang,Ma Yonglin. Effects of Nb on phase transformation of the low carbon and low alloy pipeline steel[J]. Heat Treatment of Metals,2008,33(9):95-98.