Hardfaced article and process to provide porosity free hardfaced

Details Hardfaced article and process to provide porosity free hardfaced Hardfaced article and process to provide porosity free hardfaced

1991-08-26

1993-08-17

Rowan, Kurt C.

Metal fusion bonding

Process

Plural joints

228228, 228231, 2282351, 419 8, B23K 3102, B22F 704

Patent

active

052361160

ABSTRACT:
There is provided an improved coated composite article and an improved process for making the article. A cloth-like flexible preform is brazed to a metallic substrate to make the article. The article is then subjected to a uniform high pressure and temperature for sufficient time to remove porosity in the coating. The result is a fully dense coating, which is metallurgically bonded to the substrate without any porosity, which has improved physical properties, and which is capable of being polished to a surface finish of at least 4 RMS.

REFERENCES:
patent: 3743556 (1973-07-01), Breton et al.
patent: 3916506 (1975-11-01), Wolf
patent: 4194040 (1980-03-01), Breton et al.
patent: 4939101 (1990-07-01), Black et al.
patent: 4966748 (1990-10-01), Miyasaka et al.
"Hot Isostatic Pressing of Metal Powders," Metals Handbook, 9th Ed., vol. 7, ASM, Metals Park, Ohio, 1984, pp. 419, 436.

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