Senchyshyn V. Improvement of the efficiency of induction surfacing by applying mechanical vibration

The thesis deals with the problems of increasing the stability of layer thickness of the deposited metal and operational characteristics of thin machine parts by improvement and substantiation of rational parameters of induction surfacing with the application of mechanical vibration. The structure, wear resistance, stability of the deposited metal layer thickness on the working surfaces of the powdered hard alloy PG-C1 during induction surfacing using vertical and horizontal vibration are investigated. The computational-mathematical model describing the change of parameters of the deposited metal layer structure depending on the ratio of characteristics and properties of powdered alloys structure is developed, and analytical dependences for the determination of oscillations amplitude and frequency which provide optimal dimensions of deposited metal structural components are obtained. Empirical mathematical models of the deposited metal thickness deviation depending on the change of the main induction surfacing parameters and methods of applying mechanical vibration are obtained. On the basis of the carried out theoretical and experimental investigations the new technology and equipment for induction surfacing of thin parts with application of mechanical vibration which makes it possible to increase uniformity of thickness of the deposited metal layer and uniform distribution of carbides (Fe, Cr)7C3 and (Fe, Cr)3 along the deposited metal thickness, which increases wear resistance by 1.5 times, is developed. Experimental investigations of the deviation of the deposited metal layer thickness to the working surface of the part depending on the change of main induction surfacing parameters using mechanical vibration are carried out. Special equipment for implementation of the proposed technological surfacing process and ensuring its implementation in practice is developed.