FIELD: metallurgy.
SUBSTANCE: invention relates to metal deformation process, particularly to manufacturing of pipes by moulding method. Method includes preparation of blank with one through or two closed holes, application on surface of blank of protective coating and grease lubricant, heating and pressing of blank, herewith protective coating is extracted from copper or alloy on its basis, which is applied on blank by combined chemical and electrochemical method.
EFFECT: refinement of surface of compressed pipes and reduction of losses at manufacturing of products.
6 cl, 6 ex
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