Effect of Fabricating Process on Notch Toughness of Shipbuilding Steel Plates (Report I) : Effect of Line-Heating on Notch Toughness of 50 kg/mm^2-Class High-Tensile Steel Plates

概要

論文の詳細を見る
Local embrittlement of the surface layer of line-heated steel plates may not be deep enough to warrant the rejection when carefully analyzed having due regards to the ratio of the heat-affected layer to the full plate thickness. The authors carried out V-notch Charpy impact test, brittle fracture initiation test, and brittle fracture propagation arrest test on 50kg/mm^2 high-tensile plate specimens to evaluate the effect of line-heating on their notch toughness for the full plate thickness. It was found that the effect of line-heating would vary with the water- and air-cooling and, especially, with the manner in which the water-cooling was provided, and that by choosing proper medium and timing for cooling, the steel plates could be line-heated more efficiently without adverse effects on their notch toughness.
大阪大学の論文