METHOD OF APPLICATION OF WEAR-RESISTANT COATING TO CUTTING TOOL Russian patent published in 2003 - IPC

FIELD: methods of application of wear-resistant coatings to cutting tools, applicable in metal machining. SUBSTANCE: method includes application of multilayer coatings to working surfaces of cutting tool by vacuum-plasma method. Upper layer of coating ensures minimal level of contact temperatures and amplitude of their variation during working and idle strokes of tool in process of intermediate cutting; and internal layers provide for high level of compression residual stresses in coating material and good adhesion to tool material. EFFECT: higher serviceability of tools and reduced consumption of tool materials, improved quality of machining. 3 cl, 1 tbl, 2 ex