Nickel foams with oxidation-resistant coatings formed by combustion synthesis

A combustible mixture containing aluminum, titania and boron oxide powders was deposited onto the open-cell nickel foam structural elements. Heating the sample ensured formation of a protective coating based on titanium boride and alumina over the nickel foam struts via the combustion synthesis reaction. Oxidation rate of the resultant composite foam was remarkably lower compared to the bare nickel foam, the stress–strain behavior changed and was dependent on the coating thickness, and the original open-cell structure was retained

Production of continuous castings from non-ferrous metals waste.

Are given the results and is shown the perspective of production of high quality billets from non-ferrous Al-Cu base metals waste by the continuous casting process

VERTICAL CENTRIFUGAL CASTING OF A HYPEREUTECTIC SILUMIN WITH COOLING OF THE MOLD AND CASTING

It is shown that cooling of casting molds by water with water flow of 0,42 m3/h and internal surfaces of castings with thickness of a wall 12–14 mm with water quantity 2,5×10–4–5×10–4 m3 allows to receive procurements with completely modified microstructure without use of modifiers. External layers of the produced castings consist of the eutectic silumin with compact crystals of silicon, and internal layers – of hypereutectic silumin with crystals of high-disperse primary and compact eutectic silicon

Peculiarities of manufacture of castings of diesel engines pistons out of secondary alloys

The article considers peculiarities of production technology of high-quality castings of diesel engines pistons out of secondary alloys

INVESTIGATION OF HOLLOW SLUGS OF SILUMIN AK18 BY MEANS OF FROSTING ON WATER-COOLED ROD

The possibility of production of hollow billets with diameter 35 mm of silumin AK18 by means of silvering on water-cooled bar is shown

Rectification of cast through foam-ceramic filters is an effective method of metal quality improvement

The article presents comparative analysis of various classes of sponge permeable materials according to their structural, hydrodynamic, physicomechanical and filter characteristics. It is shown that foam-ceramic filters are most effective for rectification of metal alloys of nonmetal lie inclusions

PRODUCTION OF ROTARY ENGINES’ PARTS FROM ALUMINUM ALLOYS USING LOST FOAM CASTING PROCESS

The production technology of casting details for rotary engine from the aluminum alloy АК12М2 is developed. The bulk density of expanded polystyrene to ensure the best quality of the surface of castings has been experimentally established. The lost foam casting shop was organized in the experimental department of the Institute

MODELLING OF BICOLOR PYROMETER WITH LIGHT-GUIDING TRACT FOR METALLURGICAL FURNACES

Theoretical explanation of creation of two-color pyrometer with light-guiding transmission is given. The example of practical application of such type of pyrometer for the molten metal temperature control in laboratory furnace is given

PRODUCTION OF BIMETALLIC SLUGS OF WORM WHEELS BY METHOD OF ELECTROSLAG REMELTING

Thе technology of worm-wheel production, based on mechanical amalgamation of bronze crown with hub is described. The technology of production of the worm-wheel bimetallic ingots in chill and by means of liquid forging is considered. The technology of production of bimetallic ingots by means of electroslag melting (ESM) is described and advantages of this method in comparison to the previous one are indicated