摘要
Abstract
The most direct and the most effective method to check welded joint plasticity of line pipe is bending test In this article,it briefly introduced the mechanical performance,main chemical compositions,bending test condition and judgment standard to qualified specimen in API SPEC 5L,and analyzed disqualified phenomena and cause for bending test from weld inclusions,gas pocket,brittle fracture,welding toe cracking,crack source and etc. Finally,it gave specific measures to reduce inclusions,gas pocket,brittle fracture,welding toe cracking and etc.关键词
X70管线钢管/弯曲试验/夹渣/气孔/脆性断裂/裂纹源Key words
X70line pipe/bending test/inclusion/gas pocket/brittle fracture/crack source分类
矿业与冶金
