Stock material or miscellaneous articles – All metal or with adjacent metals – Composite; i.e. – plural – adjacent – spatially distinct metal...
Patent
1986-10-10
1988-11-01
Terapane, John F.
Stock material or miscellaneous articles
All metal or with adjacent metals
Composite; i.e., plural, adjacent, spatially distinct metal...
428666, 428935, B32B 1500
Patent
active
H00005436
ABSTRACT:
This disclosure pertains to an electrodeposited chromium composite having ternating layers of high contraction and low contraction chromium. The laminated composite properties are enhanced because of thin layers of the same metal existing under different states of hardness, stress, orientation and microstructure. Thin layers of HC chromium are produced with a random orientation, low residual stress, and crack-free structure. The alternating LC chromium layers tend to duplicate the random structure of HC chromium through epitaxial growth. Accordingly, crack-free laminated chromium are produced having hardness values ranging from 655 to 1084 Knoop Hardness Numbers. By comparison, conventional high-contraction chromium shows hardness values between 1000 and 1100 KHN. However, the latter deposits are invariably micro-cracked.
REFERENCES:
patent: 1845978 (1932-02-01), Hosenfeld
patent: 2856334 (1958-10-01), Topelian
patent: 3157585 (1964-11-01), Durham
patent: 3421986 (1969-01-01), Ruft
patent: 3461048 (1969-08-01), Mahlstedt
patent: 3770286 (1973-11-01), Angilella et al.
Capsimalis George P.
Chen Edward S.
Costigan Edward F.
Gibson Robert P.
Goldberg Edward
Jorgensen Eric
Terapane John F.
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