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高圧縮性複合合金鋼粉KIPシグマロイの特性

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川崎製鉄技報 KAWASAKI STEEL GIHO

Vol.19 (1987) No.3

高圧縮性複合合金鋼粉KIP シグマロイの特性

Properties of Composite-Type Alloy Steel Powders "KIP SIGMALOY" with High Compressibility

小倉 邦明(Kuniaki Ogura) 阿部 輝宣(Teruyoshi Abe) 槇石 幸雄(Yukio Makiishi) 高 城 重 彰(Shigeaki Takajo) 峰 岸 俊 幸 (Toshiyuki Minegishi) 初 谷 栄 治 (Eiji Hatsugai) 要旨 : 高密度,高強度部品用の鋼粉として,複合合金鋼粉 KIP シグマロイを開発し,その特性を 調べた。複合合金鋼粉は純鉄粉粒子表面に微細な合金元素粉末を冶金結合させたもので,圧 縮性と焼結時の合金元素拡散性が高く,その結果,焼結体の密度,寸法精度,機械的特性に 優れている。2~20%の Cu を合金元素とするシグマロイ Cu は,従来の混粉法にくらべて, 焼結体の強度が10%,寸法精度が 30%向上する。また,2~4%Ni-1.5%Cu-0.3~0.5%Mo を含有するシグマロイ 215,315 および 415 は純鉄粉と同等以上の圧縮性を有し,焼結体 組織の均一性が高いため,混粉法にくらべて強度と靱性が10%以上向上する。 Synopsis :

Composite-type alloy steel powders, KIP SIGMALOY, have been developed for the production of high density and heavy duty structural parts. The powders are characterized by metallurgically bonding fine particles of alloying elements on the surfaces of soft iron particles, and satisfy both compressibility at compaction and alloy diffusivity during sintering. SIGMALOY Cu powders, which contain 2 to 20% Cu as an alloying element, suppress "copper growth" during sintering and hence improve sintered strength by 10% and dimensional accuracy by 30%, when compared with conventional powder mixes. SIGMALOY 215, 315 AND 415 powders with compositions 2 to 4%Ni-1.5%Cu-0.3 TO 0.5%Mo attain compressibility equal to or higher than that of pure iron powders and improve the homogeneity of sintered specimens, resulting in over 10% higher strength and toughness than those of sintered powder mixes.

(c)JFE Steel Corporation, 2003

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