The effect of hot forming schedules on the structure and properties of PK G13 powder austenite steel has been studied. It is found that increase of de- gree of austenitic steel deformation leads to softening acceleration process and hot forming temperature rise decreases the tendency to recrystal- lization. The favorable development of polygonization at lesser strain rates has been observed. The operating schedules of producing hot forming PK G13 powder steel are optimized. 

A mathematical model of self-lining of the internal surface of a mill and grinding bodies under the conditions of mechanical processing of two-com- ponent mixture has been constructed. The process dynamics is ascertained. The optimum modes allowing us to reach the prescribed degree of size reduction of the mixture are found with minimum losses of substance to self-lining. The main conclusions of the theoretical analysis are confirmed experimentally. 

Physical and chemical features of interaction of vanadium containing iron-carbon melt with the energy carrier by the thermodynamic modeling method as well as reduction and decarbonizing of green compacts in the hydrogen atmosphere have been considered. The structure and proper- ties of bars produced from vanadium-containing iron powder are given. The characteristics of the bars manufactured on the basis of carbonaceous semi-product iron powder and pure uncontaminated powder produced by the carbonyl technique are presented for comparison. A conclusion is drawn on the expediency of bar material preparation directly from powder while omitting the compaction and sintering stages. 

The results of the investigation concerning the effect of electromagnetic impact on the quality of powder ferromagnetic material being produced are presented when grinding in a hammer mill.

Comparison of the properties of materials: SPN14A7M5 steel – titanium carbide (0–30 vol.% TiC) produced by laser building-up, laser sintering, and powder metallurgy (compaction and sintering) has been carried out. Structure formation processes are investigated; the hardness of different sam- ples is compared. The possibility of material production with improved characteristics by means of laser processing, in particular, of surface strength- ening of products when using the laser building-up is established. 

The article describes a mathematical model of calculating the extrusion process of long powder compacts and composite materials with the help of screw presses through the facilities having local sectional area reduction of the forming channel. The stress field calculation in the various materi- al deformation centers along the overall length of the channel is carried out with the use of the discrete theory of plasticity. It is shown how, varying the form of channel surface, material extrusion rate in the zone of local channel section reduction and the compact section area, to select their com- bination being optimum for extrusion process. 

The pilot equipment for the main operations of SHS processes (charge mixture, compaction, and synthesis) is considered. Description of its structur- al elements, which are most responsible for the safety and efficiency of work with fire-dangerous powders and their mixtures, is given. For example, a pressure-sealing valve of original design by means of which the protective gas atmosphere, reduced or gage pressure can be created in the mill is applied in the drum of ball mills. The compression mold for preliminary compaction uses a Teflon composite insert, which completely excludes the probability of powder ingress between sliding surfaces of plug and body thereby preventing the possibility of powder ignition from friction sparks. A reaction compression mold with filling of charge mixture by a layer of quartz sand, one destination of which is removal of flue gases for inadmis- sibility of the compression mold rupture, is designed for SHS synthesis followed by compression. Safety of the SHS reactor operation is downloaded at all the stages of their life cycle from the design to operation. In this regard the system of measures and rules described in the corresponding tech- nical documentation, the references to which are given in the article, has been developed. The synthesis in the SHS mode is safe with taking neces- sary strict measures and observance of rules. 

A study of the synthetic «carbonado» structure has been carried out by electron scanning microscopy. It is established that the «carbonado» surface layer contains large diamond crystallites reaching 200 μm and having obviously expressed growing texture. Drops of metal-catalyst (nickel) of a sub- micrometric range are observed on the surface of these crystals. It is discovered that the synthetic «carbonado» structure represents interpenetrating frameworks consisted of diamond and ceramic-metal phases. 

Considering the non-uniform character of viscous flow of hard phase, the continual model of hot deformation of porous powder materials has been checked. The procedure of the phenomenological creep parameter identification for the hard phase of powder materials is described. A particular mechanism of viscous flow of hard phase particles is shown to be realized depending on temperature-force strain conditions. Unlike the cast materi- als the powder material creep process, alongside with volume and boundary diffusion, can be controlled by superficial diffusion as well. In case of the same creep mechanism, the offered continual model allows us to use for powder materials directly the phenomenological constants of cast materials. 

Fibers of metals, alloys, and intermetallic compounds with microcrystalline and amorphous structure at melt cooling speeds up to 106 K/s have been produced by the method of suspended drop extraction from melt. The conditions of quick-cooled metal and alloy formation possessing a high com- plex of mechanical and physical characteristics are shown. The process diagram of manufacture of porous-fibrous metal materials designed for ag- gressive medium filtration and noise suppression in the hot channel designs of gas-turbine engines is proposed. In testing the noise suppression of porous-fibrous metal materials, the effective factor of sound absorption no below than 0.8 is obtained in a range of frequencies of 80–10 000 Hz at the sound pressure level of 110–150 dB. 

Electric-explosive carburizing followed by electron-beam processing of titanium surface has been carried out. As a result of such combined proces- sing, the processed surface microhardness is increased 14 times. Scanning electron microscope was used for studying the morphology of the coat- ing formed on the processed surface, the structure and elemental composition of the alloyed zone depending on the absorbed power density during electron-beam processing. 

Structure, composition, and properties of electrospark coatings generated on substrates from white cast iron with the use of STIM-40NA SHS-elec- trode material (TiC–NiAl composition) have been studied. The roughness of produced coating has been investigated. Application of the electrospark allowing process facilitated the increase in mill rolls stability more than two times at Open Society «Oskolsky integrated electric iron-and-steel works».