scholarly journals Testing of electrocorundum powders of the company «Technoceramics» in the manufacture of ceramic molds

2019 ◽  
pp. 12-18
Author(s):  
T. F. Baranova ◽  
I. V. Dyakonova ◽  
N. I. Shunkina ◽  
S. I. Polyansky ◽  
Yu. R. Nurtdinov ◽  
...  
Keyword(s):  
Nickel Alloys ◽  
Metal Casting ◽  
Internal Cavity ◽  
Heat Resistant ◽  
Technical Requirements ◽  
Technical Properties

The technology of manufacturing ceramic molds from electrocorundum powders of the company «Technoceramics» for the casting of parts from heatresistant nickel alloys was investigated and developed. The powders were used instead of the commercially used electrocorundum powders of JSC Rusal. Molds for metal casting of various sizes and configurations of the internal cavity for casting cooled and uncooled blades of heat-resistant alloys were manufactured and tested. Technical properties of casting molds are preserved. The characteristics of castings of equiaxial and directional structure are provided in accordance with the technical requirements of the drawing and technical conditions. Ill. 5. Ref. 2. Tab. 6.

Calculation of plasma centrifugal spraying parameters of fine granules of heat-resistant nickel alloys

2020 ◽  
pp. 471-474
Author(s):  
M.G. Yagodin ◽  
E.I. Starovoytenko
Keyword(s):  
Powder Metallurgy ◽  
Nickel Alloys ◽  
Dynamic Pressure ◽  
Calculated Data ◽  
Powder Size ◽  
Metal Powders ◽  
Heat Resistant ◽  
Gas Dynamic ◽  
Spraying Parameters ◽  
Wide Range

The equipment for the production of wide range of metal powders purposed for powder metallurgy is described. The possibility for producing of powders by the plasma centrifugal spraying is considered taking into account the gas dynamic pressure. The calculated data on the powder size for different materials are given.

scholarly journals Tertiary plutonic rocks of southern Serbia Vardar Zone as dimension stone

2014 ◽  
pp. 85-92
Author(s):  
Lidja Kuresevic ◽  
Vladimir Simic
Keyword(s):  
Field Study ◽  
Laboratory Testing ◽  
Dimension Stone ◽  
Vardar Zone ◽  
Technical Requirements ◽  
Large Size ◽  
Geological Factors ◽  
Laboratory Examinations ◽  
Technical Properties ◽  
Plutonic Rocks

Three granitoid plutons of south-Serbian part of the Vardar Zone, of Tertiary age were studied in order to establish their potential for utilization as dimension stone. These rocks vary in composition from quartzmonconite to quartzdiorite. Field study aimed at establishing the geological factors - presence of fractures, harmful minerals, alterations, jointing type and fabric homogeneity in order to determine the possibility of obtaining large size blocks of stone from the plutons. Laboratory examinations comprised petrological analyses and testing of technical properties. Stone from these plutons has shown favourable results in both field and laboratory examinations. Evaluation of the rock based on obtained laboratory testing results is performed according to technical requirements of the Serbian standard B.B3.200. It has shown that rocks from these plutons can be used as dimension stone for the production of slabs for the exterior and interior paving and cladding.

PYROLYSIS OF THE LOWER PARAFFINS: V. THE CONVERSION OF THE GASEOUS PARAFFINS TO AROMATICS IN BAFFLED METAL TUBES AND THE CHEMICAL COMPOSITION OF THE PRODUCTS

1934 ◽  
Vol 10 (2) ◽  
pp. 145-163
Author(s):  
Adrien Cambron ◽  
Colin H. Bayley
Keyword(s):  
Chemical Composition ◽  
Turbulent Flow ◽  
Alloy Steel ◽  
Nickel Alloys ◽  
Gas Flow ◽  
Thermal Conversion ◽  
Chemical Methods ◽  
Steel Tubes ◽  
Heat Resistant ◽  
Light Oil

The thermal conversion of propane to aromatics has been investigated by passing the gas through externally heated alloy steel tubes under conditions of turbulent flow. Recycling experiments carried out under pressure have shown that, when the gas flow is turbulent, high rates of conversion can be obtained at temperatures as low as 800–810 °C. Heat resistant chromium-nickel alloys of the 18:8 type have been found unsuitable for this purpose owing to the catalytic formation of carbon. Yields of 23.3 lb. of light oil per 1,000 cu. ft. of propane put through were obtained at 800 °C. together with 10 lb. of liquids boiling above 200 °C. The composition of the liquids obtained in these experiments has been determined by fractionation and chemical methods. The light oil obtained under the above conditions contains about 64% benzene, 14% toluene, 7.8% styrene and small amounts of cyclopentadiene, xylenes and higher aromatics. The liquids boiling above 200 °C. contain about 25% naphthalene and 12.5% anthracene together with smaller amounts of mono- and dimethyl naphthalenes, acenaphthene and phenanthrene.

Effect of high energy ion-implantation treatment on properties of heat-resistant nickel alloys of blades of gas-compressor units

2019 ◽  
Vol 19 ◽  
pp. 2056-2059
Author(s):  
Vadim Viktorovich Nasteka ◽  
Iiskander Rustemovich Kuzeev ◽  
Boris Olegovich Bolshakov ◽  
Askar Dzhamilevich Mingazhev ◽  
Victoria Alexandrovna Gafarova
Keyword(s):  
Ion Implantation ◽  
Nickel Alloys ◽  
High Energy ◽  
Heat Resistant
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