鋼材の熔接諸條件と冷却時間(第 7 報) : 諸熔接法による場合の総括並に連続冷却変態図との関係

概要

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The Cooling time in case of C. S. arc welding process is approximately equal to that of submerged arc welding process, and the cooling is slower remarkably than that of manual arc welding process with covered electrodes. The above mentioned fact, coupled with the fact that the welded part by C. S. arc welding shows a low hydrogen content, is extremely advantageous, because the tendencies of embrittleness and cracking in the heat-affected zone are remarkably relieved by these facts. If a welding process and the welding conditions are known, the cooling time can be obtained by the nomograph or the curve based on the experimental formula. When the cooling curve corresponding to the cooling time obtained above is searched in the C-C-T diagram in case of max. heating temperature 1300°∿1400℃ the hardness and the microstructure shown by the same cooling curve is considered to be the same as the max. hardness and microstructure in the heat-affected zone by welding.
社団法人溶接学会の論文
1959-04-25