Акціонерне Товариство "Дніпропетровський Трубний Завод"
Акционерное общество "Днепропетровский трубный завод"
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Application filed by Акціонерне Товариство "Дніпропетровський Трубний Завод", Акционерное общество "Днепропетровский трубный завод"filedCriticalАкціонерне Товариство "Дніпропетровський Трубний Завод"
Priority to UA93006793ApriorityCriticalpatent/UA10796A/en
Publication of UA10796ApublicationCriticalpatent/UA10796A/en
A mandrel for pipe drawing is made from alloy on the base of tungsten carbide with coating of external working surface of one layer of titanium and three layers of titanium nitride. The layer, which consists of evenly mixed mixture of nitrides of titanium and chromium, is applied on the upper layer of titanium nitride. The invention relates to working of metals by pressure, in particular, to the pipe production, and it can be used at mandrel drawing of pipes.
UA93006793A1993-07-161993-07-16Mandrel for pipe drawing
UA10796A
(en)