炭素鋼の凝固過程および凝固後の高温変形挙動

概要

論文の詳細を見る
Phase dependence of tensile strength of carbon steel during and after solidification has been studied by a technique for high temperature tensile test. The experimental technique enabled a sample to melt and solidify without crucible, and measured a minute load in a solidification temperature range. A numerical model for the analysis of phase transformation during and after solidification was developed with an assumption of local equilibrium at interfaces. The tensile strength of carbon steel was dependent on the phase state but not composition. Predicted equations of tensile strength of δphase and γ phase were estimated from experimental results. σ_δ=0.011(T_<δ, start>-T)+1.1, MPa σ_γ=0.067(T_<γ, start>-T)+6.5, MPa 0.0005 mass%≦C≦0.55 mass%, 1550K≦Temp.≦1800K. Tensile strength of δ phase state is smaller than that of γ phase, and temperature dependence of tensile strength of δ phase is also smaller than that of γ phase.
社団法人日本鉄鋼協会の論文
1998-11-01