X90钢级大直径螺旋埋弧焊管的研制
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摘要
为了响应管道建设向高强度、高压力的发展趋势,采用低C、高Mn和Mo-Cr-Ni-Cu-Nb-Ti合金设计体系和控轧控冷技术,开发出以粒状贝氏体为主,辅之少量板条状贝氏体铁素体的X90管线钢。通过对低应力成型技术及焊接技术等制管工艺的研究,成功开发出X90钢级Φ1 219 mm×16.3 mm超高强度螺旋埋弧焊管。按照标准对该产品进行了组批性能检测,结果显示,钢管管体横向屈服强度625~740 MPa,抗拉强度715~835 MPa,焊缝抗拉强度770~825 MPa;焊接接头最大硬度小于270HV10;-10℃下管体横向平均冲击功大于340 J,热影响区平均冲击功大于197 J,焊缝平均冲击功大于133 J;0℃下管体横向DWTT剪切面积均为100%。结果表明,开发的钢管具有优异的强度、塑性及韧性匹配,焊接性能良好。
In response to the trend of high strength, high pressure pipeline construction development requirements, adopting low C, high Mn, Mo-Cr-Ni-Cu-Nb-Ti alloy design system and controlled rolling and controlled cooling technology, it developed X90 pipeline steel which consists of most granular bainite and less strip bainite ferrite. Through research on low stress forming technology, welding technology and so on, the ultra-high strength X90 steel grade 1 219 mm×16.3 mm SAWH pipe was successfully developed. The group batch performance test was conducted in accordance with relevant technical standard, and the test results showed that the transverse yield strength of pipe body is 625~740 MPa, the tensile strength is715~835 MPa, the tensile strength of weld seam is 770 ~825 MPa; the hardness of welded joint is less than 270HV10; the average transverse impact energy of pipe body is higher than 340 J under-10 ℃, the average impact energy of HAZ is higher than 197 J, the average impact of weld seam is higher than 133 J; and the transverse DWTT shear area of pipe body is100% under 0 ℃. It is concluded that the developed steel pipe has excellent strength, plasticity, toughness and toughness matching, the weldability is good.
In response to the trend of high strength, high pressure pipeline construction development requirements, adopting low C, high Mn, Mo-Cr-Ni-Cu-Nb-Ti alloy design system and controlled rolling and controlled cooling technology, it developed X90 pipeline steel which consists of most granular bainite and less strip bainite ferrite. Through research on low stress forming technology, welding technology and so on, the ultra-high strength X90 steel grade 1 219 mm×16.3 mm SAWH pipe was successfully developed. The group batch performance test was conducted in accordance with relevant technical standard, and the test results showed that the transverse yield strength of pipe body is 625~740 MPa, the tensile strength is715~835 MPa, the tensile strength of weld seam is 770 ~825 MPa; the hardness of welded joint is less than 270HV10; the average transverse impact energy of pipe body is higher than 340 J under-10 ℃, the average impact energy of HAZ is higher than 197 J, the average impact of weld seam is higher than 133 J; and the transverse DWTT shear area of pipe body is100% under 0 ℃. It is concluded that the developed steel pipe has excellent strength, plasticity, toughness and toughness matching, the weldability is good.
引文
[1]王红伟,吉玲康,张骁勇,等.批量试制X90管线钢及板材强度特性研究[J].石油管材与仪器,2015,1(6):44-51.
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[3]王晓香.当前管线钢管研发的几个热点问题[J].焊管,2014,37(4):5-13.
[4]高惠临.管线钢与管线钢管[M].北京:中国石化出版社,2012.
[5]彭涛,高惠临.管线钢显微组织的基本特征[J].焊管,2010,33(7):5-11.
[6]王凤成,王建,李哲,等.高钢级厚壁螺旋缝焊管残余应力控制措施[J].钢管,2014,43(2):49-52.
[7]李国鹏,韩秀林,赵波,等.X80和X90管线钢热影响区组织与韧性对比[J].焊管,2014,37(7):13-17.
[8]王端军,付志斌,夏乾峰,等.焊接热输入对X90管线钢CGHAZ组织和冲击性能的影响[J].天津冶金,2014(1):23-25.
[9]毕宗岳.管线钢管焊接技术[M].北京:石油工业出版社,2013.
[10]Q/SY GJX 124—2013,天然气输送管道用X90钢级螺旋缝埋弧焊管技术条件[S].
[2]高珊,郑磊,章传国.超高强度系列管线钢厚板的研制[J].世界钢铁,2009,9(5):5-10.
[3]王晓香.当前管线钢管研发的几个热点问题[J].焊管,2014,37(4):5-13.
[4]高惠临.管线钢与管线钢管[M].北京:中国石化出版社,2012.
[5]彭涛,高惠临.管线钢显微组织的基本特征[J].焊管,2010,33(7):5-11.
[6]王凤成,王建,李哲,等.高钢级厚壁螺旋缝焊管残余应力控制措施[J].钢管,2014,43(2):49-52.
[7]李国鹏,韩秀林,赵波,等.X80和X90管线钢热影响区组织与韧性对比[J].焊管,2014,37(7):13-17.
[8]王端军,付志斌,夏乾峰,等.焊接热输入对X90管线钢CGHAZ组织和冲击性能的影响[J].天津冶金,2014(1):23-25.
[9]毕宗岳.管线钢管焊接技术[M].北京:石油工业出版社,2013.
[10]Q/SY GJX 124—2013,天然气输送管道用X90钢级螺旋缝埋弧焊管技术条件[S].