Application of plasma chemical vapour deposition of TiN to HSS precision bearings

The paper reports the application of plasma chemical vapour deposition (PCVD) of TiN to high speed steel precision bearings, The surface metallurgical characteristics of the coatings were determined by employing surface and structural analytical techniques, i,e, scanning electron microscopy, Auger electron spectroscopy, and X-ray photoelectron spectroscopy. The layer adhesion of the coatings was evaluated by means of the scratch test. Experiments on oxidation and thermal shock resistance were also carried out. Tl;e results demonstrated good adhesion between TiN coating and high speed steel substrate. Test results showed that using PCVD, uniform coatings can be achieved having good oxidation resistance in air and good thermal shock resistance between 580 degreesC and room temperature, The tests showed that bearings coated with PCVD TiN worked normally and satisfied the working conditions.