低Cr プレアロイ粉の焼結体特性に及ぼすCu，黒鉛添加の影響

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  • Effect of Cu and Graphite Addition on the Properties of Sintered Compacts Made of Low Cr Prealloyed Powder
  • テイCr プレアロイフン ノ ショウケツタイ トクセイ ニ オヨボス Cu,コクエン テンカ ノ エイキョウ

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The mechanical properties of the sintered compacts made of the Fe–0.5mass%Cr–0.2mass%Mn–0.2mass%Mo prealloyed powder (JIP® 5CRA) have been investigated. Tensile strength and hardness of the 5CRA material increased with the increases of addition of Cu and graphite, respectively. 5CRA–2.0mass%Cu–1.0mass%Gr material showed high-strength equivalent to that of the Fe–4.0mass%Ni–1.5mass%Cu–0.5mass%Mo–0.6mass%Gr material. Microstructure of the sintered compact of the 5CRA material containing Cu was consists of fine pearlite and some bainite. High-strength of the 5CRA material would be obtained by the effect of solid solution strengthening due to Cu addition and finer pearlite with graphite addition.

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