METHOD OF APPLYING COATING TO METAL AND ALLOY PRODUCTS Russian patent published in 1994 - IPC

FIELD: machine building. SUBSTANCE: the sample is irradiated with a powerful ion beam having an energy of 250-400 keV, a current density of j ≅ 160-250/A/cm² and a duration of τ of 60-100 ns under a vacuum of 10^-4 torr. This value corresponds to the power density of greater than 4×10⁶ W/cm². A wear-resistant coating is applied to the sample thus cleaned, e. g. by a plasma method. The sample is then once again irradiated with a powerful ion beam having a power density of (0,3-6)·10⁶ W/cm² for 60-100 ns. If samples are made of metals, light alloys and steels, the power density is (0,3-2,5)·10⁶ W/cm²; if they are made of hard alloys, the power density is (2,5-6,0)·10⁶ W/cm². EFFECT: improved properties of the coatings. 3 cl, 1 tbl