FIELD: process engineering.
SUBSTANCE: invention relates to arc welding, particularly, to plasma surfacing of filler powder by direct-action contracted arc. Proposed method comprises feeding filler powder into stream of contracted arc via bin outlet metering hole. Filler powder is fed into arc stream in continuous vertical flow. Plasmatron is arranged at angle to said flow. Bin discharge chamber is communicated with atmosphere. Continuous or pulsating air or gas flow is fed via narrow cylinder channel to filler powder flow. In compliance with one version, metering hole is shut off by said narrow-cylinder channel.
EFFECT: higher quality of surfacing.
2 cl, 2 dwg
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