FIELD: process engineering.
SUBSTANCE: invention relates to surfacing by hidden-arc build-up of antirust coatings on inner surfaces on radial bores made in vessels operated under high pressure. This method comprises preset order of rolls application on inner surface of said bores made in cylindrical article. Device welding head can rotate during surfacing about axis of the bore in spiral or circular trajectory. Said head is equipped with cassette revolving therewith which comprises electrode head and flux-adding and supporting device.
EFFECT: mechanised surfacing, reduced residual strain.
3 cl, 7 dwg
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