The state of the foundry of Russia is shown. The tasks of the Russian association of founders are considered.
The analysis of the problem of calculation of metal forms used in casting production is presented. The mathematical instrument and possibilities of use of the computer technologies and modeling of the casting processes in working out the technologies with the use of chill moulds is analyzed.
The investigations of melting practice and thermo-time hold of the synthetic cast iron in the induction furnaces and mixer-distribution device, out-of-furnace development of liquid melt and filling it into tiling chills are carried out.
Тhе methods of the service durability increase of wear resistant cast irons are analyzed. There are developed the compositions of economically-alloyed cast irons with low content of nickel and other deficient elements, being exploited both in cast and in thermotreated state. The composition of antifriction gray cast iron with increased exploitation characteristics is offered.
The results of the investigations of the chemical constitution of the high-duty cast iron on its mechanical characteristics are given.
There are studied the peculiarities of the problem of" using of waste in the form of intrinsic recovery at receiving by casting in the constant ingots modes for the mating rings of turbo-compressors. It is shown, that presence of more than 50 % of the intrinsic recovery in the burden of induction melting allows to decrease the amount of the spheroidizing modifier of type FSMg 7 at production of cast iron with ball-shape graphite up to 1,3—1,4% without impairment of the graphite impurities form.
In the article there are presented the results of the experimental-theoretical identification of the parameters of contact heat exchange of the process of the continuous horizontal pace casting of zink bar in metal crystallizer with water cooling.
The influence of steel mold wall thickness on its mode of deformation at heat cycling is studied. The formula for determination of optimal wall thickness is given.
The modem melting equipment of central frequency the firm OTTO JUNKER is presented.
The efficiency of application of the furnaces of central frequency of the firm OTTO JUNKER is shown.
The results of the computer modeling of the air flood in the circular comer of two-pass radiation recuperator are presented. Production tests proved the adequacy of calculations.
Modeling and optimization of the base model of compensator of the temperature broadening of the cupola recuperator are carried out.
It is shown, that application of new silicon-free ligatures increases the properties of cast articles considerably.
In the article the original author's tractability of the methods of continuous automatic control of flow characteristics of sand blends with the use of imitation models received on the original experimental system is offered.
In the result of the research the area of small contents of fulleren C60 has been discovered (effect of fulleren homeopathy), where the crystal structure of the construction material is changed, its properties are improving sharply. Enlarging of the addition makes the properties of the material worse. The new types of nanoconstructuring alloys on the base of nickel and aluminium are made.
The article describes using of ultrasonic waves for determination of solid properties of cast iron and case hardened of steel objects. The possibility of evaluation of the gray iron type by indexes of speed of longitudinal and surface waves is shown. There is stable correlation dependence between surface speed, frequency and depth case hardened.
In the article there are examined the different ways of improvement of the structure and properties of the high-speed steels, intended for production of the cast metal-cutting instrument. It is shown, that effective methods of improving of impact elasticity of the cast high-speed steel are modification and accelerated cooling of melt at primary crystallization, electroslag remelting with using of magnetic field, and also using of steels with decreased structure dissimilarity.
In the article there are examined the peculiarities of the structure and characteristics of cast and deformed high-speed steels R6M5 and R6M5K5. It is established, that there is practically no difference in hardness and heat stability, at the same time cast steels because of the structure specificity are inferior to the deformed ones in impact elasticity, considerably exceeding them in endurance. On the basis of industrial tests it is shown that at correct nomenclature choice for embedding there are being created the backgrounds for secure work of cast instrument, resistance of which can be even higher as compared to the traditional instrument due to higher endurance of cast-steel
In the work the research of influence of the complex alloy addition as well as the additional microalloying by ligature NbVA, by zirconium nitride and ferrotitanium on the structure, mechanical and cavitation-erosive qualities of steels.
Theoretical and practical aspects of production of the Belorussian instrumental steels on the base of the steel of type 70K are considered. The ways of working out of the alloy complex for receiving of the die steels in the conditions of RUP “BMZ” are shown.
The processes of diffusion deoxidation of the metal the electric furnaces with acid fettling in the production of the component parts for rolling stock are considered. The influence of the preliminary deoxidation of the metal in the furnace on the complex of indexes of the mechanical qualities, the index of the pollution density of metal by nonmetallics, their type and the character of distribution are determined.
The actual problem of the compound stress influence on the formation of the structure and characteristics of metals is studied. It is shown, that the formed after experimental rolling structure is notable for high degree of blending and uniformity and less pronounced anisotropy of characteristics and structure along the deformation axle direction.
The way of modification of the electric silumins without application of modifying fluxing agents and ligatures has been developed. The method is based on founding with the extended speed of crystallization.
The ways of carrying out of the process with high-temperature (800 degrees Celsius and higher) heating and heating up to 600 degrees Celsius are offered. The evaluation of the testing results of the offered ways in the industrial conditions is carried out.
The new technological process and equipment for dissolution of the high-molecular flocculants, increasing efficiency of the wastewaters clearing, is developed
There are given the results of development in the State scientific university ''Institute of applied physics of the National Academy of Sciences of Belarus” of the facilities for magnetic control of the steels mechanical characteristics - coercimeter KIPF-1, impulse magnetic analyzers IMA- 4M, IMA-5B, impulse magnetic installations IMPOK-IB and facilities of their metrological support. The information about the scale of , using IS given.
The absorbation-biochemical method, based on using of the solution on the basis of the industrial water as an absorbent for clearing of ventilation air is developed.
The article is dedicated to study of the process of silver extraction out of fixing liquors by means of metal-exchange. There is shown that silver concentration in liquor is descended depending on the confusion time and mass of concentrator.
Modern technologies and equipment in foundry worked out in NP RUP uInstitute BelSRIlit” are considered.
It's shown that at working out of automatic mounting for preparation of core sand-tar mixtures the experience of creation and exploitation of previous workings of the institute BelSRIlit have been used.
The analysis of the ways of improving the quality and reduction of the first cost of the aluminum founding is presented. Different types of the gating systems with the analysis of their advantages and disadvantages are considered. It's shown that the method of founding by self-filling is being especially effective at receiving of long-distance casts. In this case the method of self-filling allows to increase considerably the yield of founding in comparison with the founding into the stationary forms.
The analysis of the ways of improving the quality and reduction of the first cost of the aluminum founding is presented. Different types of the gating systems with the analysis of their advantages and disadvantages are considered. It's shown that the method of founding by self-filling is being especially effective at receiving of long-distance casts. In this case the method of self-filling allows to increase considerably the yield of founding in comparison with the founding into the stationary forms.
The technical parameters of batch mixers for preparation of the sand mixtures of different application are given.
The technical and economic characteristic of the created and developed technological processes of the industrial production of the steel casting grit heat-treatable by induction heat is given.
The physical principles of magnetic grading of the high-test cast iron castings by structure are analyzed. It is informed about the developed apparatus “Magnetic sorter M C-1”, based on the method ''point pole”. There are given the examples of using of the apparatus at the enterprises of Belarus for control of the structure of the large dimension castings of high-strength cast iron.
The technical characteristics and the principle of functioning of mounting of piezoceramic cleansing of the metal items are given.
It was concluded that the ultrasonic techniques are sensitive to the changes in the graphite morfology, thus they can also be used to predict the mechanical properties of cast iron. On the basis of the former an Indicator of ductile cast iron has been designed. The Indicator costruction and principles of its work are discussing.
ISSN 2414-0406 (Online)