海洋石油平台焊接接头大型CTOD试验  

Large-Sized CTOD Test for Welded Joints of Offshore Petroleum Platform

作　　者：杨新岐[1] 王东坡[1] 李小魏 李磊[2] 曹军[2] 

机构地区：[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

出　　处：《焊接学报》2002年第4期48-52,共5页Transactions of The China Welding Institution

摘　　要：依据英国BS 74 4 8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(6 3.5mm)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。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.

关 键 词：海洋石油平台 焊接接头 裂纹尖端张开位移 试验测试 

分 类 号：TE951[石油与天然气工程—石油机械设备] TG404[金属学及工艺—焊接]