低ニッケル高張力鋼におけるサブマージアーク溶接金属の高靭化に関する研究

概要

論文の詳細を見る
The authers have conducted the systematic investigation in order to develop a low nickel alloy steel for extremely low temperature service line pipe. This paper is to describe the results of the study on tandem submerged arc welding to get higher toughness of weld metal at low temperature. Low C-high Mn-(2.0-2.6)% Ni steel proved to be the best plate obtaing high toughness weld metal for use in the arctic region. A Mn-Mo-Ti-B wire was developed, and the nickel content necessary for toughness was introduced to the weld metal by dilution from the base metal. The solidification phase through peritectic reaction of Fe-Ni-C system which was detremental to the toughness of weld metal could be avoided by judicious combination of base metal and wire. Boron reduced proetuectoid ferrites and made them fine in the presence of titanium, and their optimum content in weld metal ranged from 0.02 to 0.03% for titanium and was about 0.002% for born.
社団法人溶接学会の論文
1977-11-05