溶接鋼の靱性におよぼす凝固相の影響(第 1 報) : 凝固鋼の靱性におよぼす Fe-C 系包晶反応の影響

概要

論文の詳細を見る
Previous reports showed that sulfur-segregation and hot cracking sensitivity of steel weld metalmight increase remarkably through the peritectic reaction of the Fe-C or Fe-Ni phase diagram using as-cast steel specimens. This significant sulfur-segregation in solidification grain boundary through the peritectic reaction may not only increase the hot cracking sensitivity but also decrease the toughness of steel weld metal. Then, the effect of the Fe-C peritectic reaction on the toughness of as-solidified steel was investigated using as-cast specimens with various carbon contents. It was experimentally confirmed that the toughness of as-solidified steel with more than 0.1% of carbon content deteriorated remarkably because of the significant sulfur-segregation through the Fe-C peritectic reaction. It is concluded from the facts described above that the carbon content should be controlled to less than 0.1% with lower sulfur content to assure enough toughness of steel weld metal.
社団法人溶接学会の論文
1974-10-05