中・高炭素鋼の溶接における硬化性評価のための冷却時間の選択について

概要

論文の詳細を見る
It is well-known that hardenability of HAZ is one of the important factors for estimating weldability of steels. Therefore the parameter of cooling time from 800 to 500℃ (Δt_<8/5>) has been usually used for estimation of the hardenability of lower carbon high strength steels. However it is not clear if for higher carbon steels Δt_<8/5> is also useful parameter for the estimation, because the M_s temperature of these steels is lower than usual lower carbon steels. For this purpose this paper has investigated the usefulness of application of Δt_<8/5> parameter for the HAZ of higher carbon steels. Conclusively, it was cleared that the Δt_<8/3> parameter is better than Δt_<8/5> for these steels. Then the authors have introduced a new equation for estimation of the HAZ hardness for higher carbon steels using Δt_<8/3> parameter.
社団法人溶接学会の論文
1991-02-05