構造用低合金鋼 (SNCM8) の焼戻諸性質におよぼす合金元素の効果について : 構造用低合金鋼の研究 II

概要

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In the previous paper (Tetsu-to-Hagane vol. 48, (1961), 1, pp. 34∿38) effect of increasing of Ni, Cr, Mo and V, and decreasing of C content to the hardenability of Ni-Cr-Mo steel (SNCM 8 : SAE 4340) was reported. In this paper, by using the same test materials and the same quench-cooling rate, as those in the previous paper, the mechanical properties in as-tempered condition were examined in connection with their alloying elements. The test specimens quenched at 4 different cooling rates were tempered at appropriate temperature so as to obtain as-tempered strength of 80 to 130 kg/mm^2. Then a comprehensive study was made on temper-softening tendency, tensil property and notched impact property at room temperature (20℃) and -40℃. A study on sensitivity of temper-embrittlement was also performed.
社団法人日本鉄鋼協会の論文
1962-02-01