[1]张志明,苏 志,李芳芳,等.基于应变设计的X70直缝埋弧焊管应变硬化能力研究[J].焊管,2012,35(3):51-55.[doi:1001-3938(2012)03-0051-05]
 ZHANG Zhi-ming,SU Zhi,LI Fang-fang,et al.Study on the Strain Hardening Ability of X70 SAWL Pipe Based on Strain Design[J].,2012,35(3):51-55.[doi:1001-3938(2012)03-0051-05]
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基于应变设计的X70直缝埋弧焊管应变硬化能力研究
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
35
期数:
2012年第3期
页码:
51-55
栏目:
会议专辑
出版日期:
2012-03-28

文章信息/Info

Title:
Study on the Strain Hardening Ability of X70 SAWL Pipe Based on Strain Design
文章编号:
1001-3938(2012)03-0051-05
作者:
张志明苏 志李芳芳熊 伟徐树凯杨艳滨
(渤海装备巨龙钢管南京公司,南京 210061)
Author(s):
ZHANG Zhi-ming SU Zhi LI Fang-fang XIONG Wei XU Shu-kaiYANG Yan-Bin
( CNPC Bohai Equipment Manufacturing Co., Ltd. Nanjing Julong Steel Pipe Co., Ltd., Nanjing 210061, China)
关键词:
X70应变设计直缝埋弧焊管均匀延伸率应变硬化指数
Keywords:
X70strain designSAWL pipeuniform elongation percentagestrain hardening exponent
分类号:
TE335.75
DOI:
1001-3938(2012)03-0051-05
文献标志码:
A
摘要:
从A、B两种轧制状态的X70抗大变形钢板制成的钢管中取样,用板状试样测定了拉伸应力-应变曲线,计算了该钢的应变硬化指数n值,研究了时效及两种轧制状态的n值分布规律。结果表明,工艺B状态的钢管时效前n统计均值为0.116 0,时效后n统计均值为0.112 0,下降约3.4%;工艺A状态的钢管时效前n统计均值为0.115 0,时效后n统计均值为0.105 4,下降约8.3%。X70工艺B状态钢管的n值、屈强比及屈服强度呈明显线性关系。0.8%和1.4%扩径率对应钢管的应变硬化指数n值差别不大,但1.4%扩径率对应钢管的均匀延伸率均值下降明显,比0.8%扩径率对应钢管均匀延伸率均值低约2%。
Abstract:
Plate samples were sampled from A, B two kinds of rolling state of the X70 SAWL pipe with large deformation resistance.The stress-strain curve of tensile performance was inspected by using plate sample, the strain hardening exponent (n value) were calculated, the strain aging and the distribution rule of rolling state on n value were studied. The results showed that the statistical average n value of the B state samples is 0.116 0 before aging, and the value is 0.112 0 after aging, the value reduced by 3.4%; the statistical average n value of the A state samples is 0.115 0 before aging, and the value is 0.105 4 after aging, the value reduced by 8.3%. The n value is linearly proportional to yield ratio and yield strength. The 0.8% and 1.4% expanding rate have little difference on strain hardening exponent(n value), but the 1.4% expanding rate corresponding to uniform elongation decreased significantly, the uniform elongation value of 1.4% expanding rate is lower about 2% than that of 0.8% expanding rate.

参考文献/References:

[1] 戚爱华.我国油气管道运输发展现状及问题分析[J].国际石油经济,2009,12(17):57-59.
[2] 周惠久,黄明志.金属材料强度学[M].北京:科学出版社,1989.
[3] 焦多田,蔡庆伍,武会宾,等.空冷弛豫对X70级抗大变形管线钢组织性能的影响[J].材料热处理,2009,30(05):101-105.
[4] 胡世光,陈鹤峥. 板料冷压成形的工程解析[M].北京:北京航空航天大学出版社,2004.
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备注/Memo

备注/Memo:
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作者简介:张志明(1980—),男,工程师,2007年毕业于哈尔滨工程大学材料加工工程专业,主要从事钢管技术质量管理及生产工艺研究工作。
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