クロム炭化物をプレミックスしたアダマイト粉末材の機械的諸特性

概要

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Mechanical properties of the premixed adamite P/M steel have been investigated in comparison with the conventional adamite steel (1.7%C-1.2%Cr). Chromium carbide (Cr3C2) powder was mixed with adamite steel powder containing 1.7%C-1.2%Cr and then hot-isostatically pressed to a full density. During hot isostatic pressing, Cr3C2 carbide changed into Cr7C3 carbide whose size was almost twice as large as that of Cr3C2 carbide powder. Mechanical properties of the premixed adamite P/M steel were as follows: (1) The bending strength and fire cracking properties of P/M steels decreased with increasing the added content of Cr3C2 powder. However, these properties of P/M steels (6% addition) were still superior to or equivalent to those of conventional steel. (2) The fracture toughness of P/M steels increased with addition of Cr3C2 powder. It is worth noting that the fracture toughness of P/M steels (6% addition) was 1.4 times as high as that of conventional steel.
社団法人粉体粉末冶金協会の論文