[1]郭 斌,刘昌明,郑 琳,等.螺旋埋弧焊管用X65级20.62 mm热轧板卷的开发[J].焊管,2008,31(3):48-50.[doi:1001－3938（2008）03－0048－03]
　GUO Bin,LIU Chang-ming,ZHENG Lin,et al.Development of 20.62mm X65 Hot-rolled Coils for SSAW Pipe[J].,2008,31(3):48-50.[doi:1001－3938（2008）03－0048－03]
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螺旋埋弧焊管用X65级20.62 mm热轧板卷的开发
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
31
期数:
2008年第3期
页码:
48-50
栏目:
应用与开发
出版日期:
2008-05-28

文章信息/Info

Title:
Development of 20.62mm X65 Hot-rolled Coils for SSAW Pipe
文章编号:
1001－3938（2008）03－0048－03
作者:
郭   斌; 刘昌明; 郑   琳; 孔君华; 徐进桥
（武汉钢铁（集团）公司研究院）
Author(s):
GUO Bin;  LIU Chang-ming;  ZHENG Lin;  KONG Jun-hua;  XU Jin-qiao
关键词:
X65级管线钢; 热轧板卷; 螺旋埋弧焊; 控轧控冷
Keywords:
X65 grade; SSAW; controlrolling and controlcooling
分类号:
TG113.2
DOI:
1001－3938（2008）03－0048－03
文献标志码:
A
摘要:
介绍了螺旋埋弧焊管用X65级、壁厚20.62 mm热轧板卷的制造方法及产品性能。研究表明，选用低C－Mn－Nb－V为基，适当添加Cu，Ni和Mo等元素，采取超纯净钢冶炼、控制轧制和轧后加速冷却工艺，开发的针状铁素体型X65级、壁厚20.62 mm热轧板卷的各项理化性能优良，达到了输气管线技术条件要求。随着板卷厚度的增加， X65级钢的碳当量增加，DWTT断口剪切面积下降。X65级钢的组织为块状铁素体+针状铁素体+少量珠光体+少量M－A岛，随着厚度增加，块状铁素体和珠光体及M－A岛数量增加，且晶粒变大，组织不均匀性和带状组织更加明显，最终导致钢的强度和DWTT性能下降，韧脆转变温度升高。随着板卷厚度增加，异常断口越易出现，断口剪切面积判定难度加大。
Abstract:
Manufacturing methods and mechanical properties of 20.62 mm X65 hot-rolled coils for SSAW pipes were introduced.The research results show that all physical chemical properties of 20.62 mm AF－type X65 hotrolled coils are excellent in case of the chemical composition basing on low carbon－Mn－Nb－V adding Cu, Ni and Mo properly,hyperpure smelting and TMCP technology;increasing with the coil thickness,the carbon equivalent of X65 pipeline steel with same strength ascends,the shearing area ratio of DWTT descends;microstructures of X65 pipeline steel consist of solid ferrite,acicular ferrite and a small amount of pearlite and M－A island,with the increment of coil thickness,the volume percentage of solid ferrite pearlite and M－A island increases,the grain size coarsens,structural heterogenity and band structure expand which leads to descend of yield strength and DWTT property and ascend of ductile-brittle transiton temperature,abnormal fracture appears more often and valuation of fracture shearing area ration becomes more difficult.

参考文献/References:

［1］杨政，冯耀荣，陈宏达，等.高性能管线钢试样异常断口分析［J］.焊管，2006，29(4)：25－30.
［2］杨政，陈宏达，赵新伟，等.70管线钢DWTT试样的分层裂纹及其断口评价［J］.钢铁，41(10)：69－73.

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[3]陈 楠,高俊星,张 楠,等.22 mm超大壁厚X80热轧板卷头、尾性能分析[J].焊管,2019,42(3):50.[doi:10.19291/j.cnki.1001-3938.2019.3.010]
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备注/Memo

备注/Memo:
郭斌(1964－)，男，硕士，教授级高级工程师，长期从事管线钢、油井管钢的研制开发。
收稿日期：2007－12－12
更新日期/Last Update: