Zakharov S. The perfection of technology electroarc metallization of metallurgical equipment parts for the purpose of operational coatings properties improvement. .

. The Thesis is devoted to the optimization electroarc metallization of metallurgical equipment component parts. On the basis of research the matter of adhesion strength electrometal coating and field of residual stress it was offered the complex solution of adhesion strength coating improvement problem. Subject of research are factors that stipulate gas thermal coating forming welded on the metallurgical equipment component (such as shaft, piston, piston role, roller and so on) with controlled porosity, oxidizing and field of residual stress by electroarc metallization. Object of research of adhesion strength gas thermal coating with its base, field of residual stress inside coating, parameters of electroarc metallization disperse jet and processes that have an affect upon the working capacity of gas thermal coating concerning about using various materials with various parameters electroarc metallization. Research methods in clude chemical analysis, metallographic analysis of coatings when increasing(200...1000), Vikkers method of microhardness measurement, metal coating capacity to work with using specially worked out method of research of coating properties as to the cut-off and break-away estimate, mathematical modeling of fields of residual stress inside coating forming, and graphical calculation programming of modern personal computers use. Mathematical model estimation of the first origin single-axle residual stresses in coatings are applied on the metallurgical equipment components in lagers by different technological methods (gas thermal spraying, electrolytic and others) when having various modulus of base and coating elasticity. Optimum operating shedule of pistons, piston-rods, roll necks of continuous-casting machine for industrial condition, which provide given complex of physical and mechanical properties homogeneous coating with stable properties reproduced and given stress sheet are obtained. Wear-resistance of these coatings are increased by 1,5...2 times while their production costs arereduced by 2...2,5 times. Applications of these working outs at "Open joint stock company" Azovsteel ensured the increasing of labour productivity; power, raw material and labour resourced which resulted in the economical effect.