FORMING A PARTING LAYER OF COATING ON THE SURFACE OF THE MOULD DURING DIE-CASTING

The paper presents the results of research on the study of the possibility of accumulation of the lubricating layer coating on the surface of the separation process of foundry equipment with high pressure die casting aluminum alloys

Structured matrices, continued fractions, and root localization of polynomials

We give a detailed account of various connections between several classes of objects: Hankel, Hurwitz, Toeplitz, Vandermonde and other structured matrices, Stietjes and Jacobi-type continued fractions, Cauchy indices, moment problems, total positivity, and root localization of univariate polynomials. Along with a survey of many classical facts, we provide a number of new results.Comment: 79 pages; new material added to the Introductio

Inverse spectral problems for Sturm-Liouville operators with singular potentials

The inverse spectral problem is solved for the class of Sturm-Liouville operators with singular real-valued potentials from the space $W^{-1}_2(0,1)$. The potential is recovered via the eigenvalues and the corresponding norming constants. The reconstruction algorithm is presented and its stability proved. Also, the set of all possible spectral data is explicitly described and the isospectral sets are characterized.Comment: Submitted to Inverse Problem

RESEARCH OF GAS-FORMING ABILITY OF THE MATERIALS USED AT DEVELOPMENT OF DIVIDING COVERINGS FOR THE MOLDS OF CASTING OF ALUMINUM ALLOYS UNDER PRESSURE

The methods of carrying out of experiments by determination of gas creating ability of different materials which are of interest from the point of view of molding of aluminum alloys under pressure are given and described, and the results of research are presented as well

RESEARCH OF LUBRICATING ABILITY OF THE MATERIALS USED AT THE DEVELOPMENT OF LUBRICANTS STRUCTURES FOR CASTING OF ALUMINUM ALLOYS UNDER PRESSURE

The research of lubricating ability of new “alternative” materials used in composition of separating coverings at molding of aluminum alloys under high pressure is carried out in the present work

EROSION RESISTANCE OF LUBRICATIONS AT PRODUCTION OF CASTINGS OF ALUMINIUM ALLOYS BY MEANS OF CASTING UNDER PRESSURE

In work studied influence of technological modes of moulding under pressure on an erosion resistance of lubricant courses most frequently used dividing mattings on various sites of foundry fitting-out at manufacture of casts from aluminum alloys

CONSUMER CHARACTERISTICS OF SEPARATING COVERINGS FOR MOULDS FOR DIE CASTING OF ALUMINIUM ALLOYS

The results of investigations of consumer characteristics of separation coverings mainly used at the enterprises of the Republic of Belarus for moulds of aluminium alloys die casting are given in the articles

INFLUENCE OF DIVIDING COVERINGS ON QUALITY OF CASTINGS AT MOLDING OF ALUMINUM ALLOYS UNDER PRESSURE

The results of researches on influence of separating coverings on such properties of castings as corrosion resistance, roughness of cast surface, casting density are given in article

GAS-CREATION OF SEPARATING COVERINGS FOR MOULDS FOR DIE CASTING OF ALUMINIUM ALLOYS

The methods of experiments on determination of gascreating ability of different separating coverings for the moulds of aluminium alloys die casting are given and described in the article, and the results of investigation are given as well