C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
C22C 38/58 (2006.01) B22D 7/00 (2006.01) B22D 25/06 (2006.01) C22C 19/05 (2006.01) C22C 19/07 (2006.01) C22C 38/02 (2006.01) C23F 15/00 (2006.01) F01L 3/00 (2006.01) F01L 3/02 (2006.01) F01L 3/22 (2006.01) F16K 1/12 (2006.01) F16K 25/00 (2006.01)
Patent
CA 2356026
To provide a corrosion-resisting and wear resisting alloy including cobalt, nickel or iron as a base used for a sliding part or a valve seat for a machine, and restraining erosion and corrosion caused by eutectic carbide constituting the alloy in an atmosphere with dissolved oxygen. A material is selected from a cobalt base added with Cr and/or W, a nickel base added with Fe and/or Cr, and an iron vase added with Cr and/or Ni. The material is cast into an ingot or a slab to produce an intermediate material. The intermediate material comprises mesh-like eutectic carbide and a base material surrounded by the eutectic carbide. A heat plastic forming is applied to the intermediate material at a temperature 650°C or more and the solidus temperature or less. The eutectic carbide is formed into multiple grains or clusters as a discontinuous distribution. A resulting corrosion-resisting and wear-resisting alloy has 0.1 to 0.5 of coefficient of friction, and 300 to 600 Hv of Vickers hardness without age-hardening process.
Chiba Yoshiteru
Kumagai Shin
Ogawa Yasuhiro
Sakamoto Akira
Shinohara Hiroyuki
Hitachi Ltd.
Hitachi Kyowa Engineering Co. Ltd.
Hitachi-Ge Nuclear Energy Ltd.
Kirby Eades Gale Baker
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