Effect of Vanadium on Properties of Age-Hardenable Mn-Cr Type Nonmagnetic Steel

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  • 時効硬化型Mn-Cr系非磁性鋼の機械的性質におよぼすVの影響
  • ジコウ コウカガタ Mn-Crケイ ヒジセイ コウ ノ キカイテキ セイシツ ニ オヨボス V ノ エイキョウ

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Abstract

The effect of containing vanadium (0∼2.7%) on the properties of 17Mn-12Cr type nonmagnetic austenite steel investigated. The results obtained were as follows.<BR>(1) Hardness, yieled strength after aging treatment increased with the vanadium content. In all the specimens different in vanadium content the highest strength after aging was obtained by aging at 700°C×7 hr.<BR>(2) The highest strength of the 17Mn-12Cr type nonmagnetic austenite steels, containing vanadium(1.1∼2.7%), aged after solution treatment, are all about 120 kg/mm2 in yield strength (0.2%), and nearly 15% in elongation. Magnetic permeabilities of these steels in aged condition are in the vicinity of 1.002.<BR>(3) The cause for hardening of these austenitic steels is the formation of particular vanadium carbide by the addition of vanadium which has a strong affinity for carbon and the remarkable precipitation of the vanadium carbide by aging for a short time after solution treatment.

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