Stock material or miscellaneous articles – All metal or with adjacent metals – Composite; i.e. – plural – adjacent – spatially distinct metal...
Patent
1995-10-26
1997-05-27
Zimmerman, John
Stock material or miscellaneous articles
All metal or with adjacent metals
Composite; i.e., plural, adjacent, spatially distinct metal...
428680, 251368, B32B 1504, F16K 2504
Patent
active
056330944
ABSTRACT:
Hard facing layers provided on engagement portions of a valve body and engagement portions of a valve box of a valve apparatus, consisting of cobalt-free Ni-base alloys. One of the Ni-base alloys for the hard facing layers comprises not more than 15% Fe and less than 2% W (tungsten), and the other comprises more than 15% Fe. More specifically, one of the cobalt-free Ni-base alloys essentially consists of, by weight, 15 to 20% Cr, 5 to 10% Si, 10 to 15% Fe, less than 2% W, and the balance of Ni and unavoidable impurities, and has a Vickers hardness (Hv) 510 to 630, and the other essentially consists of, by weight, 5 to 15% Cr, 5 to 10% Si, more than 15% and not more than 30% Fe, 1 to 4% W, and the balance of Ni and unavoidable impurities, and has a Vickers hardness (Hv) 400 to 470. The valve apparatus of the invention is suitably installed in a water pipe line which communicates with a nuclear reactor.
REFERENCES:
patent: 2396552 (1946-03-01), Cape
patent: 2458502 (1949-01-01), Cape
patent: 3767164 (1973-10-01), Robinson
patent: 4754950 (1988-07-01), Tada et al.
patent: 5222521 (1993-06-01), Kilhberg
Translation of Japanese Kokai Patent Application No. HEI 4[1992]-276038, Kikuo Takeshima et al., 18 pages of translation Oct. 1992.
Chiba Yositeru
Koshiishi Masato
Kumagai Shin
Takeshima Kikuo
Hitachi , Ltd.
Hitachi Kyowa Kogyo Co., Ltd.
Zimmerman John
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