高温で加熱した低炭素-窒素・高クロム-鉄合金の引張性質

概要

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Tensile properties of high Cr-Fe alloys with small amounts of C and N were investigated after the heat-treatments in the temperature range from 800 to 1200℃ followed by air cooling (A.C.) or water quenching (W. Q.). The yield strength, σ_y, and the tensile strength, σ_B, showed considerable scattering with heat treatments even when the same condition of annealing was used. However, ⊿σ_y defined as the difference between σ_y of A. C. specimens and σ_y of W. Q. ones where those specimens were heated at a time in a furnace, was uniquely determined by the annealing temperature. ⊿σ_y was primarily explained by the difference between the K_y・d^<-1/2> term of Hall-Petch eq. for A.C. specimens and that for W.Q. ones, but some part of ⊿σ_y explained by the difference in the friction term, was present. Small difference in contents of C and N significantly affected the responces of ductility and of grain size in these alloys to the change in annealing temperature.
社団法人日本鉄鋼協会の論文
1977-07-01