Protective layer for a metal substrate and a method of producing

Details Protective layer for a metal substrate and a method of producing Protective layer for a metal substrate and a method of producing

1991-01-15

1993-07-27

Dean, R.

Metal treatment

Process of modifying or maintaining internal physical...

Producing or treating layered, bonded, welded, or...

148524, 148525, 148527, 148325, 148326, 148327, 427380, C23C 400

Patent

active

052307557

ABSTRACT:
A protective layer for a metal substrate is metallurgically bonded to the substrate and contains (as a percentage by mass) 35 to 50% chromium, up to 10% of which can be replaced by molybdenium, and at least iron, the proportion of iron being at least 25%. The minimum hardness is 800 HVO.1, obtained by a structure having a minimum content of 5% by volume as sigma phase. The sigma phase is obtained by heat-treatment of the coated substrate. The protective layer is particularly resistant to corrosion and also has good resistance to erosion and wear.

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patent: 4451299 (1984-05-01), Smeggil et al.
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Patent Abstracts of Japan, vol. 11, No. 106 (C-414) [2553], Apr. 3, 1987.
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