焊管2012，Vol.35Issue(3)：51-55,5.
基于应变设计的X70直缝埋弧焊管应变硬化能力研究
Study on the Strain Hardening Ability of X70 SAWL Pipe Based on Strain Design
张志明 1苏志 1李芳芳 1熊伟 1徐树凯 1杨艳滨1
作者信息
- 1. 渤海装备巨龙钢管南京公司,南京210061
- 折叠
摘要
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.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Key words
X70/strain design/SAWL pipe/uniform elongation percentage/strain hardening exponent分类
能源科技引用本文复制引用
张志明,苏志,李芳芳,熊伟,徐树凯,杨艳滨..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):51-55,5.
