Volenko I. Perfecting of a structure and technology of manufacturing of a powder ribbon for a surfacing composite alloy.

Українська версія

Thesis for the degree of Candidate of Sciences (CSc)

State registration number

0402U000227

Thesis Registration Form

0402U000227.pdf

Applicant for

Specialization

  • 05.03.06 - 3варювання та споріднені процеси і технології

18-12-2001

Specialized Academic Board

К 12.052.01

Essay

The thesis is dedicated to a problem of increase of technical and economic parameters of the "know-how" and perfecting of a structure of a powder ribbon for the engine driven arc surfacing of composite alloy ensuring higher wear resistance of parts, working in conditions of intensive abrasive deterioration. Object of research - engine driven arc surfacing of composite alloys by a powder ribbon. Subject of research - process of the governed carry of high-melting fragments of the heart in a welding bath in initial (at saved to the shape and sizes) condition at a surfacing of composite alloys by a powder ribbon. Research techniques. The primary goals of activity were decided by computational and experimental methods. The members of the theory of thermal processes, theory of elastic strength and plasticity, methods of mathematical statistics were trusted to in the basis of the mathematical models. With usage of software grounded on numerical solutions, the analytical investigations of localand integral p arameters of process in the center of deformation are conducted. The main methods of experimental researches were a technique of an estimation of homogeneity of distribution of hardening fragments and fluoride of graphite in a mixture of components during manufacturing of a blend and distribution of components in a shell by production of powder ribbons; a technique of definition of a factor of splitting of components of the heart depending on value of compression of a powder ribbon; a technique of a state estimation of fragments of components in a structure of the heart of a powder ribbon after it's a manufacturing; a technique of definition of electric resistance between a shell and heart; a technique of definition of parasitic emanatings at a melting of powder ribbons. The mathematical models of heating of the heart and thermal condition of departure of a powder ribbon and equation for calculation of parameters of model are designed. The basic yardsticks are determined, to which one there should correspond exploitation-processing behavior of thermal insulation material of an interlayer. The mathematical model of manufacturing of a powder ribbon is designed at presence of a heat-shield interlayer permitting to execute calculus of the basic parameters of process depending on value of compression, radius of working rolls, thickness of a shell, initial thickness and kinematical viscosity of a binder of an interlayer. The structure of a powder ribbon for the engine driven arc surfacing of composite alloy ensuring higher wear resistance of parts, working in conditions of an intensive abrasive wear is designed. The designed guidelines in a part of modes of seal of the heart and its dosage, usage of fluoride of graphite can be applied by production of a powder ribbon of other assigning. The approbation of a powder ribbon in conditions of joint-stock company "Kramatorsk's plant of high-gravity machine-tool construction " is conducted

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