低温钢焊接接头CTOD断裂韧性试验研究
Test Research on CDOD Fracture Toughness of Low Temperature Steel
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- DOI:
- 作者:
- 方总涛1,2, 孙勃1,2
FANG Zhong-tao1,2, SUN Bo1,2
- 作者单位:
- 1. 中国石油集团工程技术研究院, 天津 300451;
2. 中国石油集团海洋工程重点实验室, 天津 300451
CNPC Research Institute of Engineering Technology, Tianjin 300451, China
- 关键词:
- 低温钢;CTOD;断裂韧度;评价
low temperature steel;CTOD;fracture toughness;assessment
- 摘要:
- 与传统的夏比V型缺口冲击韧性试验比较,CTOD更能有效准确地评价钢材的抗脆断能力。文章按照BS 7448-1991(1997)断裂韧度试验标准,对海洋平台工艺管道用ASTM A333-2005 Gr.6低温钢焊接接头的低温(0℃,-29℃)裂纹尖端张开位移(CTOD)进行了测试。取尺寸为B×2B(B为试样厚度)、缺口方向为NP的试样进行三点弯曲试验,然后由得到的焊缝和热影响区(HAZ)的P-V曲线来计算CTOD值,并对试验结果进行了分析和讨论。
Compared with the traditional Charpy V notch toughness test, crack tip opening displacement method （CTOD） is more effective and accurate in assessing anti-fracture toughness of steel. According to BS 7448 fracture toughness test standard, CTOD was applied to test the welding joints of low temperature steel ASTM A333 Gr.6 at low temperatures （0℃, -29℃） which is used in offshore platform. Three point bending tests were conducted on the specimens with the dimension of B×2B（B is the thickness） and notch direction NP. The final value of CTOD was calculated by P-V curves of both the welds and the HAZ （heat affected zone）. And the test results were analyzed and discussed in the paper.2011,S1(S1): 27-30 收稿日期：2011-8-10分类号：TE973.3作者简介：方总涛（1984- ），男，辽宁大连人，助理工程师，2009年毕业于天津大学材料加工工程专业，硕士，主要从事焊接结构断裂、数值模拟等方面的研究工作。参考文献：
[1] 霍立兴.焊接结构的断裂行为及评定[M].北京:机械工业出版社,2000.46-77.
[2] 邓彩艳,张玉凤,霍立兴,等.X65 管线钢焊接接头 CTOD 断裂韧度[J].焊接学报,2003,24(3):6,13-16.
[3] BS 7448 -1991,Part 1:Fracture mechanics toughness tests.Part 1.Method for determination of KIC,critical CTOD and critical J values of metallic materials[S].
[4] BS 7448 -1997,Part 2:Fracture mechanics toughness tests.Part 1.Method for determination of KIC,critical CTOD and critical J values of welds in metallic materials[S].
[5] DNV-OS-C401-2001,Fabrication and testing of offshore structures[S].