Research of structure and properties of boride hardening coatings

摘要

Strengthening of parts and units of machines, increased reliability and longer service life are an important task of modern aerospace industry. As promising materials for protective-strengthening coatings, matrix composites based on ternary system Fe-B-FenB are offered. The aim of the research was to apply boride coatings on the surface of steel parts. Relevance is conditioned by the necessity to harden the surface of steel used in high-load conditions. Samples of coatings on 65 G grade steel, applied by HFC-heating, were obtained. Research of samples with different coatings studied using the metallurgical microscope was carried out. Research data on samples with different coatings applied by means of an eddy current measuring system were obtained and conclusion on electrical conductivity distribution along the sample surface depending on flux quantitative content during boriding was made.