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Induction heating is a form of non-contact heating for conductive materials, when alternating current flows in the induced coil, varying electromagnetic field is set up around the coil, circulating current(induced, current, eddy current) is generated in the workpiece(conductive material), heat is produced as the eddy current flows against the resitivity of the material.
Induction heating is a rapid ,clean, non-polluting heating form which can be used to heat metals or change the conductive material’s properties. The coil itself does not get hot and the heating effect is under controlled. The solid state transistor technology has made induction heating much easier,cost-effective heating for applications including soldering and induction brazing ,induction heat treating, induction melting,induction forging etc.<
INDUCTION SURFACE HARDENING OF TITANIUM
Research is currently in progress on the induction surface hardening of titanium and its alloys by 'means of thermochemical treatment with nitrogen and carbon (separately or together), boron, silicon, molybdenum, chromium, beryllium, aluminum, and oxygen. Thermochemical treatment of titanium and its alloys is capable of producing a considerable improvement in the operational complex of strength properties: Wear resistance, fatigue strength, resistance to sticlting, and resistance to gaseous corrosion. Fig. 1. Microstructure of carbided titanium (etchant HF + HN03' + glycerin). (X 360.) We have carried out the carbiding and nitriding of titanium alloys by high-frequency induction heating. The advantages of this method of heating for the thermochemical treatment of metals and alloys are given in detail by the authors in . The present article examines the method and results of the induction surface hardening of titanium and its alloys by carbon and nitrogen. The materials used for the investigation were titanium alloys marks VT-4 and Vf-6. The specimens were prepared in the form of cylindrical rods 3 mm in diameter and 200 mm long, and in the form of rollers 40 rom in diameter and 10 mm thick.