Coating processes – Electrical product produced – Integrated circuit – printed circuit – or circuit board
Patent
1979-11-23
1981-08-18
Newsome, John H.
Coating processes
Electrical product produced
Integrated circuit, printed circuit, or circuit board
148131, 219121P, 427328, 427330, 4273837, 427423, 432253, 295274, B05D 108
Patent
active
042846587
ABSTRACT:
A method for manufacturing a hot side regenerator cross arm seal assembly having a thermally stablilized wear coating with a substantially flat wear surface thereon to seal between low pressure and high pressure passages to and from the hot inboard side of a rotary regenerator matrix includes the steps of forming a flat cross arm substrate member of high nickel alloy steel; fixedly securing the side edges of the substrate member to a holding fixture with a concave surface thereacross to maintain the substrate member to a slightly bent configuration on the fixture surface between the opposite ends of the substrate member to produce prestress therein; applying coating layers on the substrate member including a wear coating of plasma sprayed nickel oxide/calcium flouride material to define a wear surface of slightly concave form across the restrained substrate member between the free ends thereon; and thereafter subjecting the substrate member and the coating thereon to a heat treatment of 1600.degree. F. for sixteen hours to produce heat stabilizing growth in the coating layers on the substrate member and to produce a thermally induced growth stress in the wear surface that substantially equalizes the prestress in the substrate whereby when the cross arm is removed from the fixture surface following the heat treatment step a wear face is formed on the cross arm assembly that will be substantially flat between the ends.
REFERENCES:
patent: 2141518 (1938-12-01), Cox
patent: 3124492 (1964-03-01), Dewez et al.
patent: 3148093 (1964-09-01), Williams et al.
patent: 3481715 (1969-12-01), Whalen et al.
patent: 3646993 (1972-03-01), Rice et al.
patent: 3666001 (1972-05-01), Johnson
patent: 3743008 (1973-07-01), Zeek et al.
patent: 3852990 (1974-12-01), Sparling
Davis Leonard C.
Pacala Theodore
Sippel George R.
Evans J. C.
General Motors Corporation
Newsome John H.
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