Abstract
Methods of obtaining chromium-coated coatings are considered and technology for the formation of boron, silicon and titanium protected layers on steels under conditions of self-propagating high-temperature synthesis is presented. Using the methods of mathematical modeling, when obtaining wear-resistant coatings on machine parts in conditions of self-propagating high-temperature synthesis, optimal compositions of SHS mixtures have been developed. When tested in sliding friction conditions, the best abrasion resistance, among the coatings under consideration, are chromoaluminium-coated coatings. Their wear resistance is 4.8-5 times higher than in uncoated samples, chromoaluminosilicated and chromoalumotated in 2.1-3.5. The gas-transport method of coating with the help of SHS makes it possible to obtain steel 50 and U8A with increased physical and mechanical properties, without requiring high energy costs and time.
Highlights
From the correct choice of hardness of the surface of machine parts, the effectiveness of the final result depends to a large extent - long-term performance at minimal costs
The technology should provide for a range of different modes of chemical-thermal treatment, control and diagnostic devices - from manual to automated execution with rationally connected their applications in the production, testing and operation of parts of machines. It should have a wide range of algorithms and programs that are applied to specific details, operations and tasks of increasing the wear resistance of steel parts operating under sliding friction conditions
Methods of obtaining protective coatings on metal products differ in coating technology, and the main purpose of the creation is good adhesion to the substrate, as well as obtaining a continuous, non-porous and resistant to this environment protective layer
Summary
From the correct choice of hardness of the surface of machine parts, the effectiveness of the final result depends to a large extent - long-term performance at minimal costs. The technology should provide for a range of different modes of chemical-thermal treatment, control and diagnostic devices - from manual to automated execution with rationally connected their applications in the production, testing and operation of parts of machines. It should have a wide range of algorithms and programs that are applied to specific details, operations and tasks of increasing the wear resistance of steel parts operating under sliding friction conditions. Methods of obtaining protective coatings on metal products differ in coating technology, and the main purpose of the creation is good adhesion to the substrate, as well as obtaining a continuous, non-porous and resistant to this environment protective layer. By the type of joining the protective layer with the substrate, adhesive and diffusion metallic coatings are distinguished
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