压力容器2016，Vol.33Issue(11)：14-19,6.DOI:10.3969/j.issn.1001-4837.2016.11.003
管线钢落锤撕裂试验厚度效应试验研究
Experimental Study on Drop Weight Tear Test Thickness Effect of Pipeline Steel
张华 1张宏 2赵新伟 1宫少涛 2李娜2
作者信息
- 1. 中国石油大学(北京),北京 102249
- 2. 中国石油集团石油管工程技术研究院石油管材及装备材料服役行为与结构安全国家重点实验室,陕西 西安 710077
- 折叠
摘要
Abstract
The Z curve relationship between specimen thickness and shear area was obtained through drop-weight tear test ( DWTT ) with different specimen thicknesses. With the increasing of specimen thickness,the ductile of pipeline steel decreases. Within the limits of specimen thickness large or small, specimen thickness makes less influence on the percent shear area of the fracture surface and two plat-forms of upper and lower,which appear as the Z curve. In transition section of the Z curve,the percent shear area of the fracture surface decreases with the specimen thickness increasing. The relationship be-tween critical ductile-brittle transition temperature and specimen thickness obeys Anti-Z law,which means the ductile-brittle transition temperature increases as specimen thickness increases. Similar upper and low-er platform also exists in the Anti-Z curve when specimen thickness is larger or smaller. Further analysis shows that,with the temperature decreasing,the percent shear area of the fracture surface gradually de-creases along with temperature transition curve,and the transition section of Anti-Z curve also becomes shorter. In conditions of low temperature or normal temperature,the effect of thickness on material ductile-to-brittle transition temperature is less. In the range of low and room temperature,the effect of thickness ismore obvious.关键词
管线钢/落锤撕裂试验(DWTT)/厚度效应/剪切面积/韧脆转变温度Key words
pipeline steel/drop weight tear test( DWTT)/thickness effect/shear area/ductile-brittle tran-sition temperature分类
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张华,张宏,赵新伟,宫少涛,李娜..管线钢落锤撕裂试验厚度效应试验研究[J].压力容器,2016,33(11):14-19,6.
