Sliusarev Y.K., Sliusarev I.Y. About the influence of the chemical composition on the cast structure and properties of high-strength cast iron HF 35
The analysis of the cast structure, physical and mechanical characteristics of highstrength ferritic cast iron from concentration positions has been carried out. Morphological, dimensional and quantitative characteristics of the main structural elements of the high carbon and ferritic phases are described analytically based on the mass fractions of the main components of the chemical composition, and the relationships within the structure, between the parameters of the structural elements and physical, mechanical characteristics are revealed. The calculated representation of the structure of cast iron was carried out using a complex author's technique.
Key words: Ferritic cast iron, graphite, ferritic phase, structural elements, physical, mechanical characteristics, non-destructive testing.
Finkelstein A.B., Chikova O.A., Shefer A.A., Makhmudzoda M. Oxydal – a new aluminium composite
Al-Al2O3 cast composite material called “Oxydal” was obtained by the oxygen blowing of AlSi9 melt saturated with hydrogen. The work was aimed to the studies of its structure, properties and formation mechanisms.
Key words: Aluminum alloy, titanium hydride, composite material, oxide film.
Doroshenko V.V., Belov N.A., Naumova E.A. Evaluation of the manufacturability during casting of new alloys based on aluminum-calcium eutectic
It was proposed to substitute the casting silumin with Al-Ca alloy additionally alloyed with Mg, Zn, Cu, Ni, Fe, Mn, Zr and, especially, Sc. The combined doping with Ca and Sc to obtain the necessary casting properties of the Al-Ca alloy is considered.
Key words: Hypoeutectic Al-Si alloys, “structure-property” relationships, microstructure estimation, fluidity, hot brittleness, eutectics, alloying additives.
Kazakov A.A., Kur A.A., Kazakova E.I., Kiselev D.V. Quantitative evaluation of the hypoeutectic silumin microstructures
Quantitative methods for microstructure estimation have been developed. The quantitative “structure-property” relationships for hypoeutectic Al-Si and Al-Si-Cu alloys were found. American Foundry Society’s “Chart for Microstructure Control in Hypoeutectic Aluminum Silicon Alloys” was quantified. Technical requirements for Al-6Si-2Cu alloy microstructure which guarantee mechanical properties required by GOST were established.
Key words: Hypoeutectic Al-Si alloys, “structure-property” relationships, microstructure estimation, eutectic fineness, bar chart quantification, quantitative description.
Illarionov I.E.,Sadetdinov Sh.V., Zhirkov E.N. Influence of sodium borates on the strength of the molding mixture and the quality of castings of magnesium alloys
Studies of tensile strength of samples from alpha-set mixtures have shown that the addition of 0,5% and 1,0% sodium pentaborate can increase the strength of the sample from 0,10 to 0,22 MPa in 1 hour and from 0,48 to 0,67 MPa 24 hours after manufacture. Analysis of the surface of the samples shows that the addition of sodium borates in the alpha-set of mixtures improves the quality of the surface purity of magnesium alloy castings and the number of defective castings is reduced by 2–3 times.
Key words: Alloy ML19, alpha-set mixture, sodium metabolate, sodium tetraborate, sodium pentaborate, tensile strength, surface defects.
Skaryukin D.V. Comparison of methods to evaluate properties of bentonite
The results of research works, which are carried out in laboratories of the Bentonite Group Company, are given in article. Works are carried out on purpose of improvement of quality of bentonite for foundry production and develop of new high-quality and highly effective molding materials.
Key words: The green sand, bentonite, quality of castings, decrease of defects.
Firstov À.P. Peculiarities of the optimal application area of the CO2-process
The article describes results of researches on studying of influence of module and composition of liquid glass on the properties and application of liquid-glass mixtures with CO2-process.
Key words: Liquid glass, module, carbon dioxide, penetration depth, field of application.
Melnikov I.A. Core technologies of Laempe at foundries of Chinese automobile concern Dongfeng
The article deals with successful experience of casting production of automotive parts by the example of Dongfeng company from China, and shows analysis of this producer as a most effective car producer worldwide.
Key words: Automotive components, Al-castings, cylinder head, core-making machines, foundry equipment.
Nikitin V.I., Nikitin K.V. Center of casting technologies of Samara State Technical University – polygon of science and training of personnel potential
The main scientific and technical achievements of the center of foundry technologies of SamSTU in the field of development of casting and additive technologies, reverse engineering are presented. It is shown that the creation of new laboratories and high-tech jobs provides effective training of personnel in the multi-level system of bachelor – master – postgraduate – specialist.
Key words: Centre foundry technologies, additive technologies and reverse-engineering, training of personnel, the department «Foundry and highly efficient technologies».
Gribkov O.V., Ten E.B., Konyukhova A.I. The use of computer simulation for the choice of aglass mold casting process
Some ways to manufacture the cast halves of glass forms both in sand and metal molds with different metal supply options are considered. The optimal option is selected using computer simulation of the press mold filling process.
Key words: Glass forms, shrinkage defects, sand and metal molds, metal supply.
Gavariev R.V. To the question of quality of zinth casting surface in casting in metal forms
The surface quality of Zn-alloy castings produced by die casting was investigated. An effect of the coating applied onto the forming surface of the press mold and other methods of the mold surface processing on the surface quality of castings was studied as well.
Key words: Die casting, press mold, surface quality of castings, coating.
Kosovich A.A., Bogdanova T.A., Partyko E.G., Chefanova Ya.S. Preventing the turning of oxide spot during low-pressure casting
As a result of the study, some methods were proposed to prevent defects such as trapping of the oxide film during low-pressure casting of light alloy car wheels. For this purpose, a special release coating should be applied on the forming surface of the press mold.
Key words: Car wheels, low-pressure casting, release coating, press mold, oxide film.
Table of content
Sliusarev Y.K., Sliusarev I.Y. About the influence of the chemical composition on the cast structure and properties of high-strength cast iron HF 35
Finkelstein A.B., Chikova O.A., Shefer A.A., Makhmudzoda M. Oxydal – a new aluminium composite
Doroshenko V.V., Belov N.A., Naumova E.A. Evaluation of the manufacturability during casting of new alloys based on aluminum-calcium eutectic
Kazakov A.A., Kur A.A., Kazakova E.I., Kiselev D.V. Quantitative evaluation of the hypoeutectic silumin microstructures
Illarionov I.E.,Sadetdinov Sh.V., Zhirkov E.N. Influence of sodium borates on the strength of the molding mixture and the quality of castings of magnesium alloys
Skaryukin D.V. Comparison of methods to evaluate properties of bentonite
Firstov À.P. Peculiarities of the optimal application area of the CO2-process
Melnikov I.A. Core technologies of Laempe at foundries of Chinese automobile concern Dongfeng
Nikitin V.I., Nikitin K.V. Center of casting technologies of Samara State Technical University – polygon of science and training of personnel potential
Gribkov O.V., Ten E.B., Konyukhova A.I. The use of computer simulation for the choice of aglass mold casting process
Gavariev R.V. To the question of quality of zinth casting surface in casting in metal forms
Kosovich A.A., Bogdanova T.A., Partyko E.G., Chefanova Ya.S. Preventing the turning of oxide spot during low-pressure casting
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