Loskutova T.V.

Physical and Chemical Conditions of Complex Saturation Carbon Steel 45 by Silicon and Chrome in Medium of Chlorine

The package of the applied programs with base of the thermodynamic data was used and the theoretical analysis of physical and chemical conditions of complex saturation carbon steel by silicon and chrome in medium of chlorine in the closed reactionary space was carried out at the lowered pressure of a gas phase. The influence of structure of initial components of a sating mix on equilibrium structure gas and condensed of phases of process chromosilicided is revealed.

Heat Resistance and Corrosion Resistance of Complex Chromium+Aluminum Diffusion Coatings on Titanium Alloy VT6

In this paper we study the microstructure, phase and chemical composition of complex chromium+aluminum diffusion coatings obtained by simultaneous saturation of titanium alloy VT6 with chromium and aluminum from powder mixtures. We discover that coatings consist of three separate layers of Al3Ti, AlTi, AlTi3 phases. The microhardness of diffusion multilayers in the area of Al3Ti phase is 7,1–9,0 GPa, of the main diffusion layer AlTi – 5,2–8,2 GPa and 11,0 GPa for the AlTi3 phase, that is by 2-4 times higher the microhardness of initial VT6 (3,63 GPa).

Corrosion of Steel Gas Chromoaluminized 12Х18Н10T

This paper presents the research results of chrome-calorizing of the steel 12X18Н10T. We show how to obtain chromo-calorizing coatings on the surface of the steel 12X18H10T with titanium nitride. We coat the surface by combining two processes: physical 12X18H10T vapor deposition of titanium nitride and diffusion chromo-calorizing conducted by powder in containers with fusible closure under reduced pressure at a temperature of 1050 °C for 3 hours. We determine the phase and chemical composition, thickness and microhardness of coatings before and after the heat resistance test.

Diffusion coating with titan in aluminum and 12x18h10t nitrated steel

This study reveals the results of comprehensive treatment of 12X18H10T steel. We demonstrate the possibility of combining nitrating steel in the ammonia medium at a temperature 540 °С for 20 hours followed by titanium alumunizing relying on the powder method in containers with the consumable gate under the reduced pressure at a temperature 1050 °С for 0,5–6 hours. In addition, we examine the structure, phase and chemical composition of the obtained coatings. Finally, we describe the influence of nitrating on formation of the surface barrier layer of titanium nitride TiN.

The Corrosion Resistance of Chrome-calorized Steel 12Х18N10T

The paper under scrutiny presents the research results of chrome-calorized steel 12Х18N10T. Moreover, we demonstrate that it is possible to obtain complex chrome-calorized coating with titanium nitride TiN on the surface of the steel 12Х18N10T. To obtain this coating, we combine two processes: physical vapor deposition of titanium nitride and diffusion of chrome-calorizing conducted through the powder method in containers with fusible gate under reduced pressure at 1050 C for 3 hours. Hence we obtain the structure, phase and chemical composition of coatings.

Titanium aluminizing of technical iron in the closed reactionary space in the chlorine medium

Our study highlights physical and chemical conditions for titanium aluminizing of alloys in the closed reactionary space in the chlorine medium at low pressure. In addition, we+ show that simultaneous saturation of alloys by titanium and aluminum is possible in a wide range of saturated elements densities in the original mixture. Finally, we consider phase and chemical compositions, the structure of diffusion layers, formed on the technical iron after titanizing, nitriding with further titanizing, and titanium aluminizing.

Abrasive wear resistance of composite diffusive coverages obtained by of the titan, vanadium, crome and aluminium on У8А steel

This paper presents the research results of the influence of diffusive metal coating by titan, vanadium, and chrome on the phase composition, structure and abrasive wear resistance of У8А steel. Using fixed and loose boron carbide abrasive, we establish the abrasive wear resistance. Crucially, we determine that diffusive carbide coverages, nitrides of transition metals, intermetallic compounds increase the abrasive wear resistance of У8А Steel by 2,1–4,3 times.

Heat-Tolerance of Carbide Coverages Obtained at a Successive Satiation of U8А Steel by Chrome and Titan

In this paper, we study the structure and properties of carbide coverages based on titan and chrome carbides on U8A steel. We discuss possible reactions of the interaction between chrome and titan carbides with oxygen and determine the chemism of coverages oxidization. Finally, we show the advantage of complex two-component coverages as compared to single-component ones

Chimism and thermodynamics of steel saturation by titanium and chrome

This paper studies the basic responses of carbides formation and equilibrium composition of reactionary space at the sequential steel saturation by chrome and titanium, employing the method of the thermodynamic assaying.

Titanium aluminizing of the vk8 nitrated hard alloy in the enclosed space

We investigate the phase and chemical composition, structure, characteristics and operational properties of the VK8 nitrated hard alloy after diffused titanium aluminizing in the mixture of titanium and aluminium powders in the enclosed space. We demonstrate that the strength of films produced and covered with the VK8 nitrated hard alloy increases by several times at 12Х18Н9Т steel cutting as compared to the initial alloy strength.