Influence of Electrolyte-Plasma Hardening Technological Parameters on the Structure and Properties of Banding Steel 2

2020 ◽  
Vol 989 ◽  
pp. 787-792
Author(s):  
Erkezhan Erkinbekkyzy Tabieva ◽  
Laila Gylymmeddenovna Zhurerova ◽  
Daryn Baizhan
Keyword(s):  
Aqueous Solution ◽  
Phase Composition ◽  
Processing Conditions ◽  
Structure And Properties ◽  
Technological Parameters ◽  
Initial State ◽  
Plasma Surface ◽  
X Ray ◽  
Surface Quenching ◽  
Technological Processing

This work is devoted to the study of the influence of technological parameters of electrolytic-plasma surface quenching (EPQ) on the structure and surface properties of samples of bandage steel 2. In the electrolytic-plasma treatment, we performed the cathode mode in an electrolyte containing an aqueous solution of 20% carbamide (NH2)2CO and 20% sodium carbonate Na2CO3, on the installation of EPO with appropriate technological processing conditions. According to the electron-optical, X-ray phase studies, the phase composition of the steel after the EPQ was determined. This differs from the initial one by the formation of cementite and iron oxides on the surface of the samples. It is established that the microhardness of the bandage steel 2 after the EPQ during heating for 4 seconds increases 2.4 times, in comparison with the initial state.

Influence of Electrolyte-Plasma Hardening Technological Parameters on the Structure and Properties of Banding Steel 2

2020 ◽  
Vol 839 ◽  
pp. 57-62
Author(s):  
Erkezhan Erkinbekkyzy Tabieva ◽  
Laila Gylymmeddenovna Zhurerova ◽  
Daryn Baizhan
Keyword(s):  
Aqueous Solution ◽  
Phase Composition ◽  
Processing Conditions ◽  
Structure And Properties ◽  
Technological Parameters ◽  
Initial State ◽  
Plasma Surface ◽  
X Ray ◽  
Surface Quenching ◽  
Technological Processing

This work is devoted to the study of the influence of technological parameters of electrolytic-plasma surface quenching (EPQ) on the structure and surface properties of samples of bandage steel 2. In the electrolytic-plasma treatment, we performed the cathode mode in an electrolyte containing an aqueous solution of 20% carbamide (NH2)2CO and 20% sodium carbonate Na2CO3, on the installation of EPO with appropriate technological processing conditions. According to the electron-optical, X-ray phase studies, the phase composition of the steel after the EPQ was determined this differs from the initial one by the formation of cementite and iron oxides on the surface of the samples. It is established that the microhardness of the bandage steel 2 after the EPQ during heating for 4 seconds increases 2.4 times in comparison with the initial state.

INFLUENCE OF ELECTROLYTIC-PLASMA SURFACE HARDENING ON THE SURFACE PROPERTIES OF BANDAGE STEEL

Tribologia ◽  
2019 ◽  
Vol 286 (4) ◽  
pp. 105-111
Author(s):  
Erkezhan TABIEVA ◽  
Bauyrzhan RAHADILOV ◽  
Zarina SATBAEVA ◽  
Aidar KENESBEKOV ◽  
Gulzhaz UAZYRKHANOVA
Keyword(s):  
Aqueous Solution ◽  
Surface Hardening ◽  
Treatment Time ◽  
Point Of View ◽  
Martensitic Structure ◽  
X Ray Diffraction ◽  
Technological Parameters ◽  
Plasma Surface ◽  
X Ray ◽  
Fine Grained

This work is devoted to the research of the influence of the technological parameters of electrolytic-plasma surface hardening on the structure and tribological properties of the surface of samples of the retaining steel Mark 2. Electrolytic-plasma surface hardening was carried out in an electrolyte from an aqueous solution of 10% urea and 10% sodium carbonate. According to the result of metallographic and X-ray diffraction analysis, it was determined that the phase composition of steel Mark 2 after processing varies, and fine martensite with a small amount of troostite and iron oxide is formed on the surface of the samples. Tribological experiments of samples without lubrication were carried out. These experiments have shown that all the samples studied have an increased wear resistance, which may be associated with the formation of a fine-grained martensitic structure. It was shown that from the point of view of the complex of the properties obtained, and the most promising is electrolytic-plasma action with a treatment time of 4 s.

Texture Development in a Model Al-Li Alloy Subjected to Severe Plastic Deformation

2006 ◽  
Vol 114 ◽  
pp. 337-344 ◽  
Author(s):  
Bogusława Adamczyk-Cieślak ◽  
Jaroslaw Mizera ◽  
Krzysztof Jan Kurzydlowski
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Equal Channel Angular Extrusion ◽  
Orientation Distribution ◽  
X Ray Diffraction ◽  
Technological Parameters ◽  
Initial State ◽  
Texture Characteristic ◽  
X Ray ◽  
Ultrafine Grained

The texture of Al – 0.7 wt. % Li alloy processed by two different methods of severe plastic deformation (SPD) has been investigated by X-ray diffraction, and analyzed in terms of the orientation distribution function (ODF). It was found that severe plastic deformation by both Equal Channel Angular extrusion (ECAE) and Hydrostatic Extrusion (HE) resulted in an ultrafine grained structure in an Al – 0.7 wt. % Li alloy. The microstructure, grain shape and size, of materials produced by SPD strongly depend on the technological parameters and methods applied. The texture of the investigated alloy differed because of the different modes of deformation. In the initial state the alloy exhibited a very strong texture consisting of {111} fibre component. A similar fibrous texture characteristic was also found after HE whereas after the ECAE the initial texture was completely changed.

Effect of Processing Conditions on Properties of KMnO4-Treated PAN Fibers

2013 ◽  
Vol 821-822 ◽  
pp. 23-27
Author(s):  
Xiang Li ◽  
Chun Yi Liu ◽  
Ai Wen Qin ◽  
Xin Zhen Zhao ◽  
Chun Ju He
Keyword(s):  
Mechanical Properties ◽  
Aqueous Solution ◽  
Chemical Structure ◽  
Suitable Condition ◽  
Wide Angle ◽  
Processing Conditions ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron ◽  
Pan Fibers

Plasticized polyacrylonitrile(PAN) fibers have been chemically impregnated with aqueous solution of KMnO4under varying conditions of temperature and time. The effect of modification conditions on the chemical structure and the mechanical properties of precursor fibers are characterized by wide-angle X-ray diffraction, Fourier transform infrared spectroscopy and scanning electron microscope. The experimental results show that KMnO4can be used not only as catalyst for cyclization reaction, but also as plasticizer. The chemical modification between KMnO4and PAN can not occur below70°C, the most suitable condition for modification is performed at 80°C for 5 min.

Structure and Properties of a Dimer Complex: [Co(Hdmg)2(Him)2]·(ClO4)

2012 ◽  
Vol 531-532 ◽  
pp. 280-283
Author(s):  
Xuan Wen Liu ◽  
Shi Hua Yuan ◽  
Ting Ting Lin
Keyword(s):  
Aqueous Solution ◽  
Ir Spectrum ◽  
Cobalt Atom ◽  
Structure And Properties ◽  
X Ray Diffraction ◽  
Triclinic Space Group ◽  
Coordination Environment ◽  
X Ray ◽  
Bidentate Chelate ◽  
Complex Crystal

A New Complex Crystal [Co(Hdmg)2(Him)2]·(ClO4) (H2dmg = Dimethylglyoxime,Him = Imidazole) Had Been Synthesised in Aqueous Solution and Was Characterized by X-ray Diffraction and IR Spectrum. the Complex Crystallizes in Triclinic Space Group with Cell Constants a= 20.868(7)Å, B=11.408(4)Å, C=15.816(4)Å, α=90.00°, β=116.97(2)°, γ= 90.00°, V= 3355.8(17) Å3, Z=4, F(000)=1732. the Coordination Environment of Cobalt Atom Is a Slightly Distorted Octahedron. the Four Equatorial Donors Are Four Nitrogen Atoms from Two Bidentate Chelate Hdmg Anion Ligands. the Apex Points Are Occupied by Two Nitrogen Atoms from him Ligands. the Co-N(Him) Distance Is 1.930Å, and the Co-N(dmg) Distances Are Varying in the Range from 1.886Å to 1.993Å which Are in Agreement with Corresponding Reported in a Number of other Structurally Related Copper(II) Complexes.

Research on Solvothermal Synthesis of Phase Composition Controllable Nanocrystalline TiO2 Powders

2011 ◽  
Vol 284-286 ◽  
pp. 820-824
Author(s):  
Mei Jun Li ◽  
Wen Bin Cao
Keyword(s):  
Aqueous Solution ◽  
Grain Size ◽  
Phase Composition ◽  
Absorption Edge ◽  
Photoelectron Spectroscopy ◽  
Solvothermal Synthesis ◽  
X Ray ◽  
Light Yellow ◽  
Photocatalytic Activities ◽  
Visible Light Photocatalytic

N-doped TiO2 powders have been prepared by solvothermal synthesis using TiCl3 aqueous solution as precursor. The as-synthesized powders are composed of anatase and rutile and show light-yellow in color. The grain size is ranged from 10.3 nm to 19.1 nm by Scherrer's method and the specific surface area is ranged from 21 m2/g to 122 m2/g. X-ray photoelectron spectroscopy (XPS) results indicate that N atoms have been doped into the lattice of TiO2. Ti-N bonding and radical groups such as ×OH were detected on the surface of the powders. The synthesized N-doped TiO2 powders shows excellent visible-light photocatalytic activities and their absorption edge have been red-shifted to 560 nm.

Preparation and Fluorescence Properties of GdF3:Eu3+, NaGdF4:Eu3+ Materials

2013 ◽  
Vol 661 ◽  
pp. 74-78
Author(s):  
Li Li Wang ◽  
Lian Li Liu ◽  
Qian Xu ◽  
Tong Sun ◽  
Wan Na Gu
Keyword(s):  
Aqueous Solution ◽  
Phase Composition ◽  
Polyethylene Glycol ◽  
Ph Value ◽  
Hexagonal Phase ◽  
Raw Material ◽  
Fluorescence Properties ◽  
X Ray ◽  
Ph Values ◽  
Molecular Fluorescence

The GdF3:Eu3+and NaGdF4:Eu3+powders were synthesized by hydrothermal method as raw material of Gd2O3, Eu2O3, NaF, NH4HF2, EDTA and polyethylene glycol. The powders were characterized by means of X-ray powder diffraction, SEM microscopy and Molecular fluorescence photometer. It was discussed that the pH value of aqueous solution had affection on the phase composition of synthesized powders. The complex fluorides GdF3and NaGdF4were synthesized in aqueous solution at the pH values between 3 and 6. The synthesized powders were single hexagonal phase of NaGdF4 crystal at pH=8. It was also found that different fluorescence properties were exhibited by Eu3+doping powders synthesized at different pH values of aqueous solution. The synthesized powders of GdF3and NaGdF4were excellent fluorescence materials.

scholarly journals Characteristic of Oxide Layers Obtained on Titanium in the Process of Thermal Oxidation

2016 ◽  
Vol 61 (2) ◽  
pp. 853-856 ◽  
Author(s):  
K. Aniołek ◽  
M. Kupka ◽  
A. Barylski ◽  
Ł. Mieszczak
Keyword(s):  
Thermal Oxidation ◽  
Layer Growth ◽  
Oxidation Temperature ◽  
Structure And Properties ◽  
Initial State ◽  
Crystallographic Form ◽  
Oxide Layers ◽  
X Ray ◽  
Oxide Particles ◽  
Oxidation In Air

Abstract Thermal oxidation in air may be one method to improve the properties of titanium and its alloys through its influence on the structure and properties of the material’s surface layer. This paper presents a description of oxide layers obtained on the surface of Grade 2 titanium as a result of oxidation at temperatures of 600 and 700°C. On the basis of kinetic curves, it was found that the intensity of oxide layer growth increased with oxidation temperature. Studies of the surface morphology of oxide layers showed that the size of the formed oxide particles was greater following oxidation at 600°C. The obtained layers were subjected to X-ray phase analysis and microhardness measurements. Irrespective of oxidation temperature, the scale consisted of TiO2 oxide in the crystallographic form of rutile and of Ti3O oxide. The hardness of oxide layers amounted to around 1265 HV and was more than 4 times higher compared to the material in i ts initial state.

scholarly journals Heat Treatment Effect on the Phase Composition of the Silica Electrochemical Coating and the Carbon Fiber Strength

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5209
Author(s):  
Sergei Galyshev ◽  
Evgeniya Postnova ◽  
Olga Shakhlevich ◽  
Dmitrii Agarkov ◽  
Ekaterina Agarkova ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Phase Composition ◽  
Carbon Fiber ◽  
Amorphous Silicon ◽  
Photoelectron Spectroscopy ◽  
Silicon Oxide ◽  
Fiber Strength ◽  
Sol Gel ◽  
Initial State ◽  
X Ray

This work is devoted to the study of the chemical and phase composition of a carbon fiber coating obtained by the electrochemical sol-gel method. The experimental data obtained using several independent complementary methods, including X-ray phase analysis, thermogravimetric and differential thermal analysis, scanning electron microscopy and elemental analysis, and X-ray photoelectron spectroscopy, are in good agreement with each other. It was found that the resulting coating consists of amorphous silicon oxide and crystalline potassium carbonate. Heating above 870 °C leads to the crystallization of cristobalite from amorphous silicon dioxide. At a temperature of about 870 °C, the coating acquires a smooth surface, and heating above 1170 °C leads to its destruction. Thus, the optimum temperature for the heat treatment of the coating is about 870 °C. The loss of strength of carbon fiber at each stage of coating was estimated. A full coating cycle, including thermal cleaning from the sizing, coating, and heat treatment, results in a loss of fiber strength by only 11% compared to the initial state.

INFLUENCE OF TYPE OF CRIMEAN QUARRIES CARBONATE WASTE ON DURABILITY, СURING TIME AND STRUCTURE FORMATION OF SLAG-LIME CONCRETE ON THE BASIS OF SOLUBLE GLASS WITH SILICATE MODULE 1,5-1,7

2017 ◽  
Vol 7 (2) ◽  
pp. 53-63 ◽  
Author(s):  
Igor S. SVISHCH ◽  
Elena V. NOSATOVA
Keyword(s):  
Blast Furnace ◽  
Phase Composition ◽  
Structure Formation ◽  
Curing Time ◽  
Technological Parameters ◽  
Curing Conditions ◽  
X Ray ◽  
Soluble Glass ◽  
Diffi Cult ◽  
Stone Cutting

In the article the infl uence of carbonate waste on durability, curing time and structure formation of slag-lime concrete of diff erent compositions with diff erent curing conditions on the basis of soluble glass with silicate module Mc=1,5-1,7 is considered as well as Crimean quarries stone-cutt ing waste. Slag-lime binders are diffi cult in-use because of curing time and its infl uence on concrete brick durability. One of ways of sett ing time regulation lies in introduction of some stone-cutting waste in blast-furnace grained slag before grinding. The studies of stone-cutt ing waste infl uence on curing time, durability and structure formation of slag-lime binder and concretes on its basis are able to show mechanism of curing time regulation and it will work to correct technological parameters of construction items production. The phase composition is studied with help of the diff erential thermal, x-ray diff raction and microstructural analyses.

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