Chain parts and other steel articles are provided with hard, wear-resistant carbide coatings by tumbling them in a heated retort with a particulate mix which includes a source of vanadium and/or niobium. The steel substrate comprises a steel having at least 0.2% carbon, preferably 0.7-1.2%. Where the chromium content of the steel is 4-12%, preferably 4-8%, the chemical deposition process includes drawing a small amount of chromium from the steel substrate into the vanadium or niobium carbide coating, where it is distributed substantially homogeneously, helping to provide adhesion strength to the coating.

As peças chain e outros artigos de aço são fornecidos com os revestimentos duros, wear-resistant do carbide caindo eles em um retort aquecido com uma mistura particulate que inclua uma fonte do vanadium e/ou do niobium. A carcaça de aço compreende um aço que tem ao menos 0.2% carbono, preferivelmente 0.7-1.2%. Onde o índice do cromo do aço é 4-12%, preferivelmente 4-8%, o processo químico do deposition incluem extrair um pouco de cromo da carcaça de aço no revestimento do carbide do vanadium ou do niobium, onde é distribuído substancialmente homogênea, ajudando fornecer a força da adesão ao revestimento.

 
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