高周波焼入材の静曲げ強度および静的強度と疲労強度の関係

概要

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The objective of this paper is to provide some information on the microscopic structural changes occurred during quenching and tempering processes. The effect of X-ray diffraction integral breadth on static bending strength and the correlation between static strength and endurance limit are investigated. The results summarized are : (1) Behavior of the stress-strain relation, and the bending strength can be formulated in terms of integral breadth and macroresidual stress as follows: σ_<εB>-σ_<0B>≃{23E + (- 0.15) ε・σ_r} (b - bo) σ_<BB>-σ_<0B>≃{58.5 + (- 0.26)σ_r} (b - bo) (2) In the analysis of the correlation between static strength and endurance limit, it is necessary to evaluate it under the same stress distribution. (3) The increase in static strength is higher than that of endurance limit, and the ratio of endurance limit to static stress for induction hardened steel is indicated as 0.2 to 0.4.
社団法人日本材料学会の論文
1977-04-15