理化检验-物理分册2011，Vol.47Issue(2)：85-87,3.
X70高钢级大壁厚管线钢管落锤撕裂试验的影响因素
Influence Factors of DWTT for High Grade and Thick Wall X70 Linepipe
吴金辉 1王树人 2李云龙 3张鸿博 1李记科 2杨专钊 1王长安2
作者信息
- 1. 中国石油集团,石油管工程技术研究院,西安,710065
- 2. 北京隆盛泰科石油管科技有限公司,北京,100101
- 3. 辽阳石油钢管厂,辽阳,111000
- 折叠
摘要
Abstract
Drop-weight tear test (DWTT) is an important way to predict the pipeline will crack in brittle fracture way or in ductile fracture way.For the matter of great difference of DWTT results between the specimen with thickness reduced to 19 mm by machining from one surface and the specimen with full wall thickness of Φ765.2 mm× 31.8 mm high grade and large thick wall X70 pipeline, the influence factors of DWTT results for thick wall X70 pipeline were analyzed from inhomogeneity of materials, ductile-brittle transition temperature, evaluation method for shear area rating of the fracture surface, machining method of the specimen with reduced thickness and the test equipments.Some solutions just as carrying the test on equipments with larger energy and using the full wall thickness specimens with Chevron notch were put forwards to avoid the test errors.The research for effects of rods size which supporting the specimens on DWTT results was proposed to carry out, and the rods size of the current criterion was recommended to change from (14.3±1.59) mm to (20±5.0) mn.关键词
X70高钢级大壁厚钢线钢管/落锤撕裂试验/影响因素Key words
high grade and thick wall X70 linepipe/ drop weight tear test/ influnce factor分类
矿业与冶金引用本文复制引用
吴金辉,王树人,李云龙,张鸿博,李记科,杨专钊,王长安..X70高钢级大壁厚管线钢管落锤撕裂试验的影响因素[J].理化检验-物理分册,2011,47(2):85-87,3.
