Use of Homogenizing Annealing for Formation of the Structure and Properties of Cast Blanks Produced from the Alloys Obtained by Aluminothermy

2020 ◽  
Vol 839 ◽  
pp. 20-25
Author(s):  
Artem V. Popov ◽  
Oleg N. Komarov ◽  
Sergey G. Zhilin ◽  
Valery V. Predein
Keyword(s):  
Heat Treatment ◽  
Chemical Composition ◽  
Rolling Stock ◽  
Refractory Materials ◽  
Structure And Properties ◽  
Homogenizing Annealing ◽  
Before And After ◽  
Series Of Experiments ◽  
Diffraction Patterns ◽  
Diagram Analysis

This paperwork presents the results of a series of experiments on the use of homogenizing annealing, aimed at the possibility to control the structure and properties of steel samples obtained by aluminothermy. This method of processing, in some cases, allows to eliminate the need to use subsequent heat treatment operations due to the achievement of the required properties by the cast blank material. Refractory materials and thermite mixtures used, conditions for the production of castings and their total chemical composition are given. The tensile diagram analysis of the samples before and after heat treatment is presented; the structures and diffraction patterns of the samples’ destruction spots are considered. The material obtained by aluminothermy corresponds in its chemical composition to A1, A2, A3, A4 grade of steels for the rail transport according to GOST 31334-2007 which are used in the manufacture of locomotive axes and other rolling stock.

Heat Treatment as an Alternative to Brass Warping

2014 ◽  
Vol 775-776 ◽  
pp. 151-155
Author(s):  
M.M. Wilborn ◽  
Matias Angelis Korb ◽  
G.A. Ludwig ◽  
L.T. Fhur ◽  
C.F. Malfatti ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Chemical Composition ◽  
Rolling Process ◽  
Machining Process ◽  
Before And After ◽  
Dimensional Variation ◽  
Brass Alloys

This paper proposes the reduction of warping after the machining of alloys of brass with lead. For this purpose the brass alloys were submitted to heat treatment and analyzed before and after the machining process. Elongation and dimensional variation, microstructure and chemical microanalysis of the samples were assessed. It was found that warping may be related to the chemical composition of the alloy, added to the rolling process used to obtain the material to be machined. The results showed that heat treatment before the machining process eliminates the warping seen in the workpieces.

scholarly journals Investigation of the Structure and Properties of Deformed Semi-Finished Products from Alloys of the Al-REM System Made by the Method of Ingotless Rolling-Extruding

2020 ◽  
Vol 837 ◽  
pp. 9-15
Author(s):  
Vadim Bespalov ◽  
Sergey Sidelnikov ◽  
Viktor Berngardt ◽  
Denis Voroshilov ◽  
Olga Yakivyuk ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Electrical Resistivity ◽  
Chemical Composition ◽  
Grain Structure ◽  
Metallographic Analysis ◽  
Structure And Properties ◽  
Alloy Structure ◽  
Deformed State ◽  
Alloys Of The Al

The article presents the investigation results of the structure and properties of rods of aluminum alloys containing zirconium, cerium and lanthanum after ingotless rolling-extruding (IRE) and heat treatment. The patterns of changes in the microstructure, mechanical properties, electrical resistivity depending on the chemical composition of the alloys, processed by the IRE method and various modes of rods annealing are shown. A metallographic analysis of the grain structure of the samples in a deformed state and after annealing performed. The temperatures at which the alloy structure remains stable and maintains the level of operational properties revealed. The effect of chemical composition on the heat resistance of deformed semi-finished products represented. The study made it possible to evaluate the level of properties of experimental alloys after processing by the method of ingotless rolling-extruding and various modes of rods annealing.

scholarly journals STUDY ON THE POSSIBILITY OF DOPING OF POWDER COMPOSITIONS FROM TUNGSTEN AND NICKEL BORIDE OBTAINED BY EXPLOSIVE PRESSING

2020 ◽  
pp. 28-32
Author(s):  
S. Pisarev ◽  
A. Bogdanov ◽  
V. Arisova ◽  
V. Kharlamov
Keyword(s):  
Heat Treatment ◽  
Chemical Composition ◽  
Austenitic Steel ◽  
Nickel Powder ◽  
Nickel Boride ◽  
Powder Composition ◽  
Before And After ◽  
Tungsten Boride ◽  
Explosive Pressing

The chemical composition of the phases obtained by explosive pressing in steel ampoules of tungsten boron and nickel powder compositions before and after heat treatment was studied. It has been established that it is possible by means of heat treatment at 1200 С to alloy with the material of the ampoule from austenitic steel 12Cr18Ni10Ti powder composition pressed by explosion, containing 50% tungsten boride.

scholarly journals Development of heat treatment modes for a two-phase titanium alloy to form regulated structure and properties complex

2019 ◽  
Vol 298 ◽  
pp. 00049
Author(s):  
Svetlana Skvortsova ◽  
Galina Gurtovaya ◽  
Maria Afonina ◽  
Natalya Ruchina ◽  
Gulnara Zaynetdinova
Keyword(s):  
Heat Treatment ◽  
Titanium Alloy ◽  
Chemical Composition ◽  
Structure And Properties ◽  
Two Phase ◽  
Hot Rolled

The article shows the possibility of creating structure of the same type and, accordingly, a close level of properties in hot-rolled semi-finished products of the VST2K alloy with different chemical composition by means of heat treatment.

Evaluation of Freezing Methods by Low Temperature X-Ray Diffraction

1977 ◽  
Vol 35 ◽  
pp. 330-333
Author(s):  
T. Gulik-Krzywicki ◽  
M.J. Costello
Keyword(s):  
Biological Materials ◽  
Molecular Organization ◽  
X Ray Diffraction ◽  
Glass Capillary ◽  
X Ray ◽  
Rate Dependent ◽  
Before And After ◽  
Freeze Etching ◽  
Diffraction Patterns ◽  
Set Up

Freeze-etching electron microscopy is currently one of the best methods for studying molecular organization of biological materials. Its application, however, is still limited by our imprecise knowledge about the perturbations of the original organization which may occur during quenching and fracturing of the samples and during the replication of fractured surfaces. Although it is well known that the preservation of the molecular organization of biological materials is critically dependent on the rate of freezing of the samples, little information is presently available concerning the nature and the extent of freezing-rate dependent perturbations of the original organizations. In order to obtain this information, we have developed a method based on the comparison of x-ray diffraction patterns of samples before and after freezing, prior to fracturing and replication.Our experimental set-up is shown in Fig. 1. The sample to be quenched is placed on its holder which is then mounted on a small metal holder (O) fixed on a glass capillary (p), whose position is controlled by a micromanipulator.

The Precipitation of Si in AlCuSi Thin Films

1973 ◽  
Vol 31 ◽  
pp. 34-35 ◽  
Author(s):  
R. M. Anderson
Keyword(s):  
Electron Microscopy ◽  
Thin Films ◽  
Heat Treatment ◽  
Solid Solution ◽  
Integrated Circuit ◽  
Copper Film ◽  
Solution Concentration ◽  
X Ray ◽  
Silicon Thin Films ◽  
Before And After

Aluminum-copper-silicon thin films have been considered as an interconnection metallurgy for integrated circuit applications. Various schemes have been proposed to incorporate small percent-ages of silicon into films that typically contain two to five percent copper. We undertook a study of the total effect of silicon on the aluminum copper film as revealed by transmission electron microscopy, scanning electron microscopy, x-ray diffraction and ion microprobe techniques as a function of the various deposition methods.X-ray investigations noted a change in solid solution concentration as a function of Si content before and after heat-treatment. The amount of solid solution in the Al increased with heat-treatment for films with ≥2% silicon and decreased for films <2% silicon.

Study of fine structure of cold-deformed steel 20 before and after prerecrystallization heat treatment

2015 ◽  
Vol 0 (1) ◽  
Author(s):  
Oleksandr M. Dubovyi ◽  
Oleksandr V. Chechel ◽  
Oleksandr O. Zhdanov
Keyword(s):  
Heat Treatment ◽  
Fine Structure ◽  
Before And After ◽  
Steel 20
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