US 12,030,078 B2
Plasma transfer wire arc thermal spray system
Leander Schramm, Remda-Teichel (DE); Alexander Schwenk, Hachenburg (DE); and Enrico Hauser, Langenbach b. K. (DE)
Assigned to FORD GLOBAL TECHNOLOGIES, LLC, Dearborn, MI (US)
Filed by FORD GLOBAL TECHNOLOGIES, LLC, Dearborn, MI (US)
Filed on Jul. 1, 2020, as Appl. No. 16/918,165.
Application 16/918,165 is a division of application No. 13/259,433, granted, now 10,730,063, previously published as PCT/EP2010/054355, filed on Mar. 31, 2010.
Claims priority of application No. 09156942 (EP), filed on Mar. 31, 2009.
Prior Publication US 2020/0331012 A1, Oct. 22, 2020
Int. Cl. B05B 7/22 (2006.01); C23C 4/131 (2016.01); H05H 1/42 (2006.01); B05B 7/06 (2006.01); B05B 13/06 (2006.01)
CPC B05B 7/224 (2013.01) [C23C 4/131 (2016.01); H05H 1/42 (2013.01); B05B 7/06 (2013.01); B05B 13/0636 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A method of starting a plasma transferred wire arc thermal spray apparatus, comprising:
directing a plasma gas stream into a nozzle passing a second electrode and exiting a nozzle orifice as plasma gas jet;
switching on electrical power with full power to form a plasma arc between a wire free end of a wire and the second electrode thereby melting the wire free end without a pilot arc between the nozzle and the second electrode; and
atomizing a molten wire by the plasma gas jet and propelling an atomized metal spray onto a surface for forming a metal coating thereon.