Foundry
The data, enabling to establish peculiarities and distinction of liquid-phase reduction of oxides in rotation furnaces, are received as a result of laboratory and field observations.
The purpose of this work is development and research of cast boron materials and technology of their production, intended for work in corrosion environments.
The article deals with methods for the production of metallic materials with porous structure during crystallization depending on the used foundry technologies. It is shown that by using modern scientific and technological advances it has possible to improve the traditional methods and the development of new casting processes, providing production of cast parts with different porous structure and special properties.
Metallurgy
It is shown, that the introduction of a new technological automation system for continuous casting machines allowed a full control of product quality and provided cutting blooms in line with production targets.
It reviews, that the use of FreeCooling technology at the JSC«BSW», will help to increase cooling capacity of equipment, to reduce energy costs, to extend the life of the cooling machine compressors, to increase the reliability of the existing cooling machines.
It reviews the production of cast-iron balls for milling metals.
It is shown that the numerical model of steel wire cord lay, using the finite element method will allow, with a sufficient degree of adequacy, to describe the processes of steel wire cord laying.
Promising directions of induction heating are analyzed.
The scientifically and economically justified requirements to the chemical composition of nonageing low-carbon low-silica (no more than 0.010%) boron modified (0.003%) dead-melted steel are offered. Rod for welding wire of small diameters in the process of high-speed rolling should be expose to softening TMO.
Defects of continuous cast still billets, which run because of the deviation from the given technology, are investigated and causes of their forming are established in JSC “BSW”.
It reviews the new extended edition of standards for reinforcement steel core of JSC “BSW”, supplied to the European market.
The efficiency of the wear-resistant alloys 200Г4Х5л and 200Г5Х2ТФл use as inserts for combined rubbermetal linings of drum-type ore grinding mills is shown.
Conditions and possible mechanism of formation of magnetite from hematite are defined by means of mechano-chemical influence, where the product of regeneration forming on JSC «BMZ» is used as initial raw materials.
Science of materials
The magnetic pulse installation, intended for hardening of cylindrical steel articles by strong pulse electromagnetic field, is developed and produced. Results of researches show high efficiency and prospects of the developed method for hardening of steel articles.
The paper shows that wear resistance of new modified babbit material (MBM) is by an order of magnitude higher than that of the Б83 State Standard 1320-74 standard babbit material. Therefore, the latter can be recommended for restoration of sliding bearings that are used in gascompressor units.
The energy model of metals seizure for processes of joint deformation of homogeneous and heterogeneous metals is offered on the basis of known hypotheses of metals seizure.
The possibility of elimination of diamond loss on graphitization by application of thin-film SiC-covering on the surface of diamond with magnetron sputtering of combined cathode Si + C is shown.
Production of porous powder materials from spherical powders of corrosion-resistant steel 12Х18н10Т with formation at low pressures 120–140 mpa in the mold with the subsequent activated sintering became possible due to increase of duration of process of spattering and formation of condensate particles (Si–C) or (Mo–Si) on surface.
It is shown that the thickness of cemented layer defined after cementation by samples from steel 12Хн3А, is overstated by 0,20–0,35 mm because of higher content of nickel.
The descriptionjring rolling process is provided. Main advantages of the process are given in comparison with the conventional methods of producing annular parts. Main shape defects are also provided that appear at incorrect parameters as well as formulae allow to define boundaries of optimal parameters.
The deformed state of the forging was investigated in this work. For its exact specifying the «stepwise deformation method» was used.
Possibilities of use of optoacoustic contact method for control of metalware are analysed and results of experimental surveys on identification of superficial cracks of micron opening by moving beam of pulse and laser emission are presented.
Experience exchange
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