Articles

 


№1 | №2 | №3 | №4 | №5 | №6 | №7 | №8 | №9 | №10 | №11 | №12




1.
dx.doi.org/ 10.18577/2307-6046-2014-0-3-1-1
УДК 669.14:621.833
Nerush S.V., Evgenov A.G.
RESEARCH OF FINE-DISPERSED METAL POWDER OF THE HEAT RESISTING ALLOY OF THE EP648-VI BRAND FOR LASER METAL DEPOSITION (LMD) AND ALSO THE ASSESSMENT QUALITY OF WELDING OF POWDER MATERI-AL ON THE NICKEL BASIS ON WORKING BLADES THP

Fine-dispersed metal powders of the heat resisting alloy brand EP648-VI for laser metal deposition (LMD), obtained by method of atomization at a facility HERMIGA 10/100 VI are investigated. It is shown, that the obtained fine-dispersed powders when spraying by cold and hot gas have low oxygen content, the spherical form, the expressed dendritic structure in all range of the granulometric distribution. Adaptive laser metal deposition with application metal powder of the heat resisting alloy EP648-VI of the granulometric distribution 40–80 microns on working off technology of recovery of geometry extreme combs on the bandage shelf of working blades of the second step guarantees high quality of welding material (availability of defects of typemicrocracks, lack of penetrations is not revealed).

Read in Russian

2.
dx.doi.org/ 10.18577/2307-6046-2014-0-3-2-2
УДК 669.018.44
Sidorov V.V., Rigin V.E., Filonova E.V., Timofeeva O.B.
THE STRUCTURE INVESTIGATIONS AND PROPERTIES OF VGM4-VI AND VGM5-VI SINGLE CRYSTAL ALLOYS WITH INCREASED PHOSPHORUS QUANTITY

The effect of phosphorus impurity on structure transformation and stress rupture properties of VGM4-VI and VGM5-VI single crystal alloys was investigated. It was es-tablished that a phosphorus at increased content (above 0,01%) reduces the stress rup-ture properties. Using the scanning electron microscope method it was established that a phosphorus at increased content (above 0,01%) increases a quantity of microcracks near rupture place, favours more intensive proceeding the process of hardenable γ'-phase coagulation, enriches the areas near eutectic γ'-phase and favours melt of the structure components at heat treamtent. For neutralization of harmful phosphorus influence in alloys the rear earth metal – lanthanum application is effective.

Read in Russian

3.
dx.doi.org/ 10.18577/2307-6046-2014-0-3-3-3
УДК 621.775.8
Balinova Yu.A., Shcheglova T.M., Lyulyukina G.Yu., Timoshin A.S.
FEATURES OF FORMATION α-Al2O3 IN POLYCRYSTALLINE FIBERS CONTAINING 99% ALUMINA DOPED WITH Fe2O3, MgO, SiO2

In present article is shown the influence of additives of Fe2O3, MgO, SiO2 on alumina formation in fibers, obtained from spinning solution by sol-gel process. Influence of doping oxides on the grain size α-Al2O3, size distribution, grain growth rate at increase of sintering temperature is considered.

Read in Russian

4.
dx.doi.org/ 10.18577/2307-6046-2014-0-3-4-4
УДК 629.7.023.224
Solncev S.St., Shvagireva V.V., Isaeva N.V., Solovyova G.A.
MULTIPURPOSE GLASS-ENAMEL COATING FOR PROTECTION OF CAST PARTS OF GAS TURBINE ENGINES

Contains information about the composition, properties, purpose, effectiveness glass-enamel coating for protection of cast parts hot tract of gas turbine engines of iron-nickel alloys, from high-temperature gas corrosion. The coating retains its high temperature resistance, head-resistance, durability of cou-pling in the process of multistage heat treatment: hardening at temperature 1120°C – 3 hours, aging at 750°C – 15 hours, and during operation at temperature of 700 to 900°C, which reduces the oxidation of alloys in 25–30 times.

Read in Russian

5.
dx.doi.org/ 10.18577/2307-6046-2014-0-3-5-5
УДК 678.8
Donetskiy K.I., Kogan D.I., Khrulkov A.V.
PROPERTIES OF THE POLYMERIC COMPOSITE MATERIALS MADE ON THE BASIS OF BRAIDED PREFORMS

Even more often in space and civil industries when manufacturing products from polymer composites materials use braided preforms. Such materials are characterized by considerable resistance to stratifying and blow, high fatigue rates. Use braided preforms allows to provide possibility of automation of production, to provide the high speed and profitability of process of manufacturing of polymer composites materials. The knowledge of their properties at design of samples of equipment allows to optimize release of products with necessary parameters.

Read in Russian

6.
dx.doi.org/ 10.18577/2307-6046-2014-0-3-6-6
УДК 621.792.053
Lukina N.F., Petrova A.P., Kotova E.V.
HEAT-RESISTENT ADHESIVES USED IN AVIATION AND SPACE TECHNIQUE

The article provides information about heat-resistant adhesives, which has been de-veloped by FGUP VIAM, on the basis on element organic, phenolic and сarboran-containing oligomers. These adhesives are designed for working in conjunctions in temperatures up to 1200°C. The article covers basic characteristics of the heat-resistant adhesives, which are produced at the present time, for usage in aviation and space technologies.

Read in Russian