Carburized high chrome liner

Details Carburized high chrome liner Carburized high chrome liner

1984-12-06

1986-02-04

Hoffman, James R.

Metal treatment

Compositions

Heat treating

148 315, 427 37, 427252, C23C 806, C23C 1600, B05D 306

Patent

active

045683930

ABSTRACT:
A hard corrosion resistant surface is provided on a ferrous substrate by first overlay welding onto the substrate surface a chromium containing ferrous material. The deposited overlay can then be machined. It is thereafter subjected to a carburization treatment at a temperature and for a time sufficient to cause the overlay to become converted to an austenitic material containing iron chromium carbides. After cooling, the carburized overlay material is heated for a time and at a temperature sufficient to cause the austenitic matrix material to precipitate secondary carbides and convert to a martensite matrix material upon cooling. It is also contemplated to initiate the aforesaid treatment with a suitably selected chromium containing ferrous material that thereby is not overlay welded.

REFERENCES:
patent: 2292662 (1942-08-01), Sanders
patent: 3019327 (1962-01-01), Engel
patent: 3271554 (1966-09-01), Johnson
patent: 3712182 (1973-01-01), Penwell
patent: 3827920 (1974-08-01), Shimoda et al.
patent: 3918137 (1975-11-01), Telang et al.
patent: 3980506 (1976-09-01), Overkott
patent: 4256518 (1981-03-01), Bolton et al.

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