Application of Avinit vacuum plasma technologies Avinit to the manufacture of high-precision full-size gears

Avinit duplex technologies have been developed, combining N plasma nitriding of finished high-precision parts with subsequent application superhard antifriction coatings in a single technological process Due to the absence brittle layer on nitrided surface after precision nitriding, preservation original geometric dimensions that do not require further mechanical refinement, and compatibility processes vacuum deposition functional C, allow strong adhered, high-quality coatings. The effect during gears C was investigated, properties parameters were studied. Plasma technology allows without changing dimensions, including 4 degrees accuracy. time is 2 ... times less than gas nitriding. coating C310 increases microhardness surfaces reduces coefficient friction, while it has sufficient adhesion working gear teeth bearing raceways. Manufacturing accuracy grade using carried out. Analysis results shows that, within measurement accuracy, no changes profiles teeth, their location ring gear, as well relative measuring bases are observed. makes possible reduce by more two compared thickness phase maximum hardness ensured specified values ​​to ensure necessary indicators contact bending long-term strength manufacture according degree grinding Measurements showed there geometry processed technology. anti-friction 1.5 microns thick does distort tooth profiles. All manufactured correspond accordance requirements technical documentation. tested part AI-450M engine reducer at Ivchenko-Progress hydraulic brake stand program equivalent cyclic tests. A pair experimental installed instead serial wheels second stage reducer. total test 26 hours. After testing, damage coating, found. Antifriction testing Measurement complete wear.