Research of the composition, structure and properties of deposited alloys of the titanium—aluminum system doped with chrome

2021 ◽  
pp. 470-475
Author(s):  
A.I. Kovtunov ◽  
A.G. Bochkarev
Keyword(s):  
Wear Resistance ◽  
Chemical Composition ◽  
Heat Resistance ◽  
Titanium Aluminide ◽  
Titanium Aluminides ◽  
Structure And Properties ◽  
Composition And Structure ◽  
Titanium Aluminum ◽  
Composition Structure

The results of the study of the processes of argon-arc surfacing of alloys based on titanium aluminides doped with chromium are presented. The effect of surfacing modes on the chemical composition and structure of the deposited alloys has been established. The results of testing the hardness, wear resistance and heat resistance of chromium-alloyed alloys based on titanium aluminide are presented.

Investigation of structure and properties of surfaced coatings based on titanium nickelide

2021 ◽  
Vol 4 ◽  
pp. 81-88
Author(s):  
A. I. Kovtunov ◽  
◽  
D. I. Plahotny ◽  
T. V. Semistenova ◽  
A. G. Bochkarev ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Phase Composition ◽  
Chemical Composition ◽  
Heat Resistance ◽  
Titanium Nickelide ◽  
Nickel Electrode ◽  
Structure And Properties ◽  
Relative Wear ◽  
Relative Wear Resistance

The conditions for formation of coatings based on titanium nickelide under the argon double-arc surfacing of titanium and nickel electrode wires on the titanium samples were shown. Results of evaluating the quality of formation and geometric parameters of the weld at the double-arc surfacing were presented. Relationship between the ratio of feed rates of nickel and titanium wires and chemical composition of the deposited coatings has been established. Investigations of the structure of the surfaced metal at the surfacing modes was carried out. It has been shown that argon double-arc surfacing formed coatings based on the Ti2Ni and TiNi. Mechanical and operational properties of surfaced coatings were studied — hardness, resistance to abrasion and heat resistance at 800 °С. Relative wear resistance of surfaced coatings is higher than that of titanium samples. Dependence of the relative wear resistance of the coatings on the chemical and phase composition was shown. Dependence of heat resistance of the surfaced coatings on the modes of surfacing and the chemical composition of the weld metal is established.

Investigating formation, structure and properties of coatings based on Cu–Ti alloys

2019 ◽  
pp. 175-181
Author(s):  
A. I. Kovtunov ◽  
T. V. Semistenova ◽  
A. M. Ostryanko
Keyword(s):  
Wear Resistance ◽  
Heat Resistance ◽  
Chemical Compound ◽  
Wear Resistant Coating ◽  
Titanium Coating ◽  
Structure And Properties ◽  
Properties Of Coatings ◽  
Wear Resistant ◽  
Ti Alloys ◽  
Titanium Wire

The paper offers technology of argon-arc surfacing with titanium wire in order to form heat and wear resistant coating based on the titanium cuprides. The influence of surfacing modes on the chemical compound and structure of formed coatings is determined. The wear resistance and heat resistance at 600°C and 800°C were researched for copper–titanium coating with 8–63% titanium.

THE STRUCTURE AND PROPERTIES OF IRON ALLOYS WITH VARIOUS CHEMICAL COMPOSITIONS AFTER DIFFUSIONAL BORONIZING

Tribologia ◽  
2017 ◽  
pp. 65-71 ◽  
Author(s):  
Aleksandra PERTEK-OWSIANNA
Keyword(s):  
Wear Resistance ◽  
Chemical Composition ◽  
Boride Layer ◽  
Alloying Elements ◽  
Chemical Compositions ◽  
Test Results ◽  
Structure And Properties ◽  
Two Phase ◽  
Phase Layer ◽  
The Core

The purpose of the paper was to test how the content of carbon and alloying elements in steels influence the structure and properties of boronized layers. The following grades of steels were used during the tests: C45, C99U, 41Cr4, 42CrMo4, 45SG, 50HS, 60G, and 102Cr6. In the process of boronizing, the two-phase layer of borides of FeB and Fe2B were obtained on the tested steels with a hardness from 1900 HV0.1 for boride FeB to 1600 HV0.1 for Fe2B, irrespective of the chemical composition of the core/substrate. As the kontent of carbon and alloying elements in steels increase, the structure of borides becomes more compact, and the needles are thicker. The richer in alloying elements the core and the more carbon in steel, the thinner is the boride layer. After boronizing, the layer of FeB and Fe2B with a thickness of approx. 110 μm for C45 steel to approx. 90 μm for 102Cr6 steel was obtained. The test results indicate that the brittleness of borides increases in steels with the addition of Cr, and it decreases in steels containing Si and Mn. The highest wear resistance was obtained in steel 102Cr6.

The Study of the Complex Mechanical Properties of Rolled Bars of VT6 Alloy as a Function of Chemical Composition and Structure Type

2020 ◽  
Vol 989 ◽  
pp. 283-289
Author(s):  
Yu.B. Egorova ◽  
L.V. Davydenko ◽  
I.M. Mamonov
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Statistical Tests ◽  
Structure Type ◽  
Strength Properties ◽  
Alloying Elements ◽  
Mean Values ◽  
Composition And Structure ◽  
Composition Structure ◽  
The Stability

This paper presents the results of statistical tests, carried out to identify the mechanical properties of Ø 16-150 mm VT6 titanium alloy bars, as a function of their post-annealing chemical composition and structure. It is shown that the high variation of mechanical properties may be, due to fluctuations in the grade composition and structure type. 50% to 60% of variations in strength properties are due to composition + structure co-effects. To improve the stability of such properties, the paper identifies maximum permissible total fluctuations in the chemical composition in terms of aluminum/molybdenum equivalents of alloying elements and impurities. The research team has fitted the regression dependencies for evaluating the mean values of the mechanical properties of Ø 16-60 mm VT6 bars, as a function of the structure type and aluminum/molybdenum equivalents of the alloying elements and impurities.

The Development of Technology of Basalt Nanocomposite Coatings Detonation-Gas Spaying on the Disk («Target») Basis of Thin Layer Magnetron Spaying Equipment

2018 ◽  
Vol 927 ◽  
pp. 201-207 ◽  
Author(s):  
T.A. Sitnikova ◽  
E.B. Zhukov ◽  
T.A. Golovina ◽  
N.A. Saprykina ◽  
Elena P. Tesleva
Keyword(s):  
Wear Resistance ◽  
Chemical Composition ◽  
Thin Layer ◽  
Elevated Temperatures ◽  
Nanocomposite Coatings ◽  
Temperature Resistance ◽  
Starting Mixture ◽  
High Microhardness ◽  
Detonation Method ◽  
Composition Structure

The chemical composition, structure and microhardness of detonation coatings based on mechanically activated mixture of basalt powder and TiAl have been studied. It has been shown that the application of mechanomixture with detonation method results in the formation of composite coating similar to the composition of starting mixture. It has high microhardness and temperature resistance that will increase the wear resistance of the parts coated with basalt at elevated temperatures.

Analysis, Composition and Structure of Rubber and Rubber Products

1967 ◽  
Vol 40 (1) ◽  
pp. 238-270 ◽  
Author(s):  
Wlllard P. Tyler
Keyword(s):  
Review Paper ◽  
Vantage Point ◽  
Analytical Chemist ◽  
Structure And Properties ◽  
New Techniques ◽  
Methods Of Analysis ◽  
Composition And Structure ◽  
Composition Structure ◽  
Complete Bibliography ◽  
Remarkable Progress

Abstract Seven years has passed since the review of methods of analysis of rubber and rubber products by Burger was published in this Journal. At that time the author covered a broad field of endeavor with special emphasis on classical methods of analysis. He also foresaw the future of instrumental techniques, many of which were only beginning to be useful in rubber chemistry. The questions that must be answered today seem to us, from the vantage point of seven years of remarkable progress, to be more complex. Which new techniques have proved to be most useful in helping the analytical chemist to solve daily problems of analysis of his own and his competitors' products? Which techniques are giving him a tool to study the relation between composition, structure, and properties of rubbers? Which techniques can help the polymer chemist to better chart his course in the search for new and better elastomers? The new techniques, and a few of the old ones, have advanced so rapidly in the last decade that it is presumptuous to think that we can answer these questions completely in a review paper. What, then, is the purpose of this review? We could prepare a complete bibliography and comment briefly on the more important papers. But this has been adequately done, with a very broad scope, in the reviews appearing in Analytical Chemistry every two years. We feel this approach would be redundant. We have chosen, instead, to attempt to cover available techniques from the standpoint of what can be done with them in several important areas, using key papers from the literature as a basis. Our added comments are the result of years of experience in the ceaseless quest for the best use of analysis and structure-determining tools in advancing research, development, and production in the field of elastomers.

Structure and Properties of TiAlLaN Coatings Deposited at Various Ar/N2 Flow Ratio Using a Mid-Frequency Magnetron Sputtering System

2013 ◽  
Vol 834-836 ◽  
pp. 629-633
Author(s):  
Hao Du ◽  
Hai Bo Zhao ◽  
Ji Xiong ◽  
Lin Lin Wang ◽  
Guang Xian
Keyword(s):  
Wear Resistance ◽  
Elastic Modulus ◽  
Magnetron Sputtering ◽  
Lattice Parameter ◽  
Cemented Carbide ◽  
Structure And Properties ◽  
Flow Ratio ◽  
Composition Structure ◽  
Xrd Patterns ◽  
Sputtering System

TiAlLaN coatings were deposited on the cemented carbide substrates by mid-frequency magnetron sputtering system. The effects of Ar/N2 flow ratio on the composition, structure, adhesion and hardness followed with elastic modulus and H/E ratio were investigated systematically. Results indicate that all the Ti/Al ratios of the coatings were higher than that of the Ti/Al ratio in the target; however, the Ti/Al ratio increased with the Ar/N2 flow ratio changed. XRD patterns show that the intensity of (111) peak was elevated with the Ar/N2 flow ratio increased. Meanwhile, the peak shifted to lower angles, which implied increases of the lattice parameter. The TiAlLaN coating under the Ar/N2 flow ratio of 3:1 showed the best adhesion, the highest hardness and the lowest H/E ratio which indicated perfect wear resistance.

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