Process for coating or hardfacing a part by means of a plasma tr

Details Process for coating or hardfacing a part by means of a plasma tr Process for coating or hardfacing a part by means of a plasma tr

1995-07-12

1997-04-29

Padgett, Marianne

Coating processes

Spray coating utilizing flame or plasma heat

Nonuniform or patterned coating

427455, 427580, 21912137, 21912147, B05D 132, C23C 408, B23K 900, H05H 148

Patent

active

056247176

ABSTRACT:
The invention relates to a process for coating or hardfacing recharging a part by means of a plasma transferred arc.
According to the process, on the part (1) to be coated or hardface is deposited at least one weld bead (7a, 7b, 7c) of said material solely by means of the plasma transferred arc (5), by moving the plasma relative to the part at a speed of 1.5 to 50 m/min and using a power of the plasma such that the surface of the part is melted over a thickness at the most equal to 0.5 mm and so that the enlargement of the grains in the melted area does not exceed 10%, without cooling the part during recharging.

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Patent Abstracts of Japan, vol. 11, No. 250 (M-616)(2697), Aug. 14, 1987, JP-A-62 057 770, Mar. 13, 1987 "Powder Build-up Welding Method and its Equipment".
E. J. Hellund, The Plasma State, Reinhold Pub. Corp., N.Y. 1961 (no month), see chapt. 3 "Arc Plasma", pp. 33-64.

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