Toyota Jidosha Kogyo Kabushiki Kaisha

Japan Powder Metallurgy Co. Ltd.

Seishu Mitani

Tetsuya Suganuma

Kenji Ushitani

Kametaro Hashimoto

Youichi Serino

Itaru Niimi

Minoru Mitani

Tsuneo Kudo

Kunizo Imanishi

Kunizou Imanishi

Shuichi Saido

Disclosed is a flywheel assembly for recording and or reproducing devices which is produced by molding and sintering a mixture consisting principally of iron and graphite powders and, if necessary, a sulfur powder.

Flywheel for recording and or reproducing apparatus

A sintered alloy having improved wear resistance at high temperatures, comprising a soft, predominantly iron matrix having a Vickers hardness of 100-200 containing more than 5 but at most 20% Mo, together with 0.5-1.5% carbon and at least one additive selected from the group consisting of nickel, cobalt and chromium, with said additive constituting at most 25% by weight of said alloy, and most of said molybdenum being contained in Mo-Fe particles having a Vickers hardness of 600-1300 which are uniformly distributed within said matrix and have an average diameter of 20-70 microns.

Sintered alloy having wear-resistance at high temperature

Iron-base sintered alloy for the valve seats of internal combustion engines is an iron-base alloy powder containing, by weight, 6 - 20% chromium less than 2.0% nickel, and carbon 0.2 - 1.5%, together with at least one additive selected from among 0.3 - 1.5% manganese, 0.2 - 1.5% sulfur, 0.5 - 8% molybdenum, and 0.5 - 2.5% silicon, and molded to a sintered density of 6.2 - 6.8 g/cm.sup.3.

Iron-base sintered alloy for valve seat

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Kyoto, Japan

Seishu Mitani