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| 海洋石油平台焊接接头大型CTOD试验 |
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杨新岐1, 王东坡1, 李小魏2, 李磊2, 曹军2, HUO Li-xing1,2, ZHANG Yu-feng1,2
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1.天津大学 材料科学与工程学院, 天津 300072;2.海洋石油工程股份有限公司, 天津 塘沽 300452
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| 摘要: |
| 依据英国BS7448断裂韧性试验标准,对焊接接头超大尺寸低温裂纹尖端张开位移(CTOD)试验测试技术进行了探讨,对采用焊条电弧焊与埋弧焊工艺施焊的、板厚为2.5in(63.5mm)的海洋石油平台焊接接头试样进行了CTOD试验,分别测试了-18℃两种工艺下焊缝金属和热影响区的CTOD断裂韧性,对试验结果及试验中的有关技术问题进行了分析讨论。试验表明,除两个热影响区(HAZ)试样外,其余试样均满足美国Phillips石油公司提出的最小CTOD为0.15mm的要求。试验结果为评价这种板厚焊接接头的焊后热处理规范提供了依据。 |
| 关键词: 大尺寸焊接接头 裂纹尖端张开位移(CTOD) 试验测试 |
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| Large-Sized CTOD Test for Welded Joints of Offshore Petroleum Platform |
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YANG Xin-qi,WANG Dong-po,LI Xiao-wei,LI Lei,CAO-Jun,HUO Li-xing,ZHANG Yu-feng
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School of Material Science and Engineering, Tianjin University, Tianjin 300072, China
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| Abstract: |
| The measuring and testing technique of large sized crack tip opening displacement (CTOD) tests for welded joints used in the construction of offshore petroleum platform under low environmental temperature (-18℃) were performed in accordance with the BS 7448 standard (Part.2,1997).The CTOD tests on the weld metal and heat affected zone(HAZ)regions were conducted for the welded joints with a thickness of 2.5in (63.5 mm) welded by SMAW and SAW technology respectively.The testing results and some technique problems during the test procedure were discussed in details.Except for two specimens of HAZ,it is shown that the CTOD values of all specimens meet the requirement of minimum CTOD 0.15 mm proposed by the Phillips.The experimental results provided the basis to estimate the effect of heat treatment procedures after welding on the welded joints with large sized thickness. |
| Key words: large sized welded joint crack tip opening displacement measuring and testing |
