PROCEDURE FOR APPLICATION OF HARD ANTI-FRICTION COATING

摘要

FIELD: machine building. ^ SUBSTANCE: procedure for application of hard anti-friction epoxy coating on metal surface consists in preparing powder composition and in its further gas-flame sputtering. As epoxy resin in powder there is used soft pre-condensate of epoxy diane resin with molecular weight from 340 to 600 with aromatic amine at amount of 0.1-0.7 from stoichiometry mixed on rollers or in an extruder with the rest amount of aromatic amine to stoichiometry 0.9-1.2 and mixture of anti-friction powder and fibrous cut filler at amount from 50 to 250 wt. shares per 100 wt. sh. of mixture of resin with amine. Before gas-flame sputtering surface of metal is treated with a mixture of phosphoric acid (A), metal or its oxide (B) and phosphate or ammonia polyphosphate (C) at ratio A:B:C from 92:6:2 to 60:30:10. ^ EFFECT: reduced temperature of coating hardening at raised strength properties and deformation heat resistance. ^ 1 cl, 2 tbl, 1 ex