Thermally sprayed titanium diboride composite coatings

Details Thermally sprayed titanium diboride composite coatings Thermally sprayed titanium diboride composite coatings

1996-04-10

1998-11-17

Bareford, Katherine A.

Coating processes

Spray coating utilizing flame or plasma heat

Continuous feed solid coating material

427455, 427456, 106 105, C23C 406, C23C 410, C23C 416

Patent

active

058373268

ABSTRACT:
Abrasion-wear resistant thermal sprayed stainless steel based coatings are disclosed, particularly arc sprayed stainless steel coatings containing titanium diboride crystals which impart hardness to the soft stainless steel matrix and enhance their resistance to hard abrasive media. There is also disclosed a process for making core wires composed of stainless steel sheaths and cores composed of a mixture of titanium diboride, stainless steel and certain additives. During the thermal spraying operation, the stainless steel sheath and the core material melt to form a composite coating containing fine hard titanium boride crystals dispersed within stainless steel. The arc sprayed stainless steel based coatings are more resistant to abrasion wear than solid pieces of type 304 stainless steel and other arc-sprayed stainless steel-based coatings available on the market. Although reference is made mainly to the arc spraying process, the core wires are suitable for other thermal spraying processes that use wires as the feed material, for instance combustion and arc-plasma spraying and weld overlay surfacing techniques.

REFERENCES:
patent: 3025182 (1962-03-01), Schrewelius
patent: 3332752 (1967-07-01), Batchelor et al.
patent: 3440079 (1969-04-01), Jensen
S. Dallaire et al, Synthesis and Deposition . . . Surface and Coatings Technology (1992) 50, 241-248 (no month date).
S. Dallaire et al, Phenomenology of Reactive Core . . . Proceedings of the Intl. Thermal Spray . . . Orlando, May 28, 1992.

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