Electric heating – Metal heating – By arc
Patent
1978-06-26
1981-01-06
Albritton, C. L.
Electric heating
Metal heating
By arc
291567A, 219121LE, B23K 2700
Patent
active
042438675
ABSTRACT:
An apparatus for fusibly bonding a powder coating material to a metal article includes a holding device for releasably supporting the article, a depositing device for controllably placing the powder coating material in a band onto a surface of the article, and a laser beam for controllably liquifying a portion of the band of powder and juxtaposed surface while minimizing heat transmission into the article and allowing rapid hardening of the portion of the band after removal of the laser beam to provide a surface layer having properties based substantially solely on the coating material and a relatively thin, strong region of interstitial bond between the surface layer and the article having properties based upon both the coating material and the article. An exemplary engine valve with a relatively fine metallurgical surface structure for increased hardness is disclosed.
REFERENCES:
patent: 3147747 (1964-09-01), Kittelson
patent: 3362057 (1968-01-01), Kubera et al.
patent: 3417223 (1968-12-01), Sleigerwald
Alfred O. Schmidt, Journal of Engineering for Industry, "Tools and Engineering Materials with Hard, Wear-Resistant Infusions," pp. 549-552, 8, 1969.
Earle Michael
Lenzen Glenn H.
Albritton C. L.
Caterpillar Tractor Co.
Lanchantin, Jr. Charles E.
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