Abstract
The article shows the advantages of plasma hardening in comparison with other methods of surface hardening of steel products. Appropriate schemes of hardening of various products are considered and experimental data characterizing the possibility of obtaining a hardened layer of various thickness during the realization of various methods of plasma heating are presented.
Highlights
At the present time a surface heat treatment especially a hardening has widespread applications [1,2,3,4]
Various methods for rapid intense heating of surface layers of metal are applied for that purpose
The most widely used methods are: a heating by high-frequency currents [5,6,7,8,9,10,11,12,13,14], a laser heating [15,16,17,18,19] and a gas-flame heating [20,21], a plasma heating [22,23] is used for very limited applications
Summary
At the present time a surface heat treatment especially a hardening has widespread applications [1,2,3,4]. The advantage of that kind of treatment is the possibility of localization of the heating area which allows performing the following operations: to treat very limited areas of the surface, to apply hardened reliefs on the surface of the products, to make hardening of screw-threads etc Such a method makes it possible to carry out a series of localized thermal treatments whose technological capabilities have not been fully studied, and their field of application is limited by the lack of data on their effect on the design parameters of the product (wear resistance, reliability parameters, etc.). Heating by high-frequency currents has become widespread [5,6,7,8,9,10,11,12,13,14] but its application is limited by the inability to localize the heat source in confined areas and by the low efficiency of converting of electrical energy into thermal one in the heating zone
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