FIELD: plastic metal working, namely preparation of rolled plate surface for cold upsetting. SUBSTANCE: method for preparing surface of rolled plate includes steps of shot blasting and drawing at interrupting said operations in such a way that pause before drawing operation does not exceed 5 seconds and reduction degree at drawing is no more than 30%. Microrelief applied on surface of rolled plate includes uniformly arranged recesses. Said microrelief is coated by releasing film and recesses are filled by lubricant. EFFECT: elimination of phosphate coating application, enhanced strength of cold upsetting tool.
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Authors
Dates
1998-01-27—Published
1996-12-14—Filed