焊管2012，Vol.35Issue(3)：24-28,5.
N80钢级HFW套管的研发
Development of N80 Grade HFW Casing
摘要
Abstract
In this article, it studied the mechanical properties, micro-structure, residual stress, and grooving corrosion performance of HFW casing under N80-1 and N80-Q delivery conditions. The result indicated that the structure of N80-1 consist of ferrite, pearlite a little bainite, the structure of N80-Q is mainly tempered sorbite. A longitudinal metal flow line in N80-1 weld center was found obviously, while the width of N80-Q metal flow line is narrower and not clear. It found the lamellar structure of pearlite in pipe body nearby N80-1 weld is complete and clear, while the pearlite in weld is small and disorderly, so this kind of microstructure match along with the higher residual stress. The residual stress value of N80-1 HFW reach 235~258 Mpa, while the residual stress value of N80-Q is very low, the whole pipe heat treatment ' can effectively eliminate welded pipe residual stress, but increase production cost. The grooving corrosion sensitivity* linearity increases with loading stress increasing.关键词
N80/HFW/套管/残余应力/沟槽腐蚀Key words
N80/HFW/ casing/ residual stress/ grooving corrosion分类
能源科技引用本文复制引用
史宏德,田青超,丁维军..N80钢级HFW套管的研发[J].焊管,2012,35(3):24-28,5.
