Russia)
in the work. The influence of these fibers
on physico-mechanical, tribological
and thermophysical properties of phenol-formaldehyde resin was studied. As a result
of the researches it was found that organoplastic reinforced by 60 mass.% of Rusar-С
fiber has an optimal set of physico-mechanical characteristics and exceeds the
composition containing Tanlon fiber 1,3–2 times respectively, but it is inferior in heat
resistance to the composite with 70 mass.% of Tanlon 1,4-2,3 times. OP containing 60
mass.% of the Tanlon fiber has the best complex of tribological characteristics. It is
twice as high as composite with Rusar in friction coefficient.
The thirty-second section “MATERIALS SCIENCE FOUNDATIONS OF
MAKING ECONOMICAL OIL AND GAS LINE TUBES WITH IMPROVED
CORROSION RESISTANCE”. Based on analysis of published sources and the results
of own studies as well as data on physical and chemical action of corrosive media of
oil and gas fields and influence of thermal and deformation parameters of hot rolling
on grain boundary structure and corrosion resistance of pipes, the following was
developed. 1) сhemical composition of cost-effective low-carbon low-alloy 06Cr1-U
steel with regulated content and ratio of chemical elements and limited content of
sulfide non-metal inclusions; 2) еnergy-saving technology for production of oil and gas
pipeline pipes of high corrosion resistance with elements of grain boundary design.
The development enables obtaining of pipes with fine-grained ferrite-pearlitic structure
and absent perlitic striation, a high content of special low-energy boundaries α / α (up
to 23 %) and an effective complex of corrosion, mechanical and operational properties.
High corrosion resistance of 06Cr1-U steel pipes in chloride, chloride-acetate and
hydrogen sulfide containing media was established during gravimetric and
electrochemical testing, resistance to hydrogen cracking (HC) and sulfide stress
corrosion cracking (SSCC) during testing in accordance with NACE 0284 and NACE
TM 0177 specifications as well as in long term (more than 20 years) service tests in
highly mineralized stratal water of oil and gas fields. The technology of production of
06Cr1-U steel pipes was implemented in metallurgical industry and pipes of high
operational reliability were tested in the oil and gas industry of Ukraine.
The thirty-third section “ANALYSIS OF MUTUAL INFLUENCE BETWEEN
PARAMETERS OF THE INDURATION PROCESS FOR IRON ORE PELLETS”.
The induration process is a complex operation as it involves a large number of various
parameters and the reaction phenomena is not simple. While studying this problem, it
is important to consider such parameters as the chemical composition of the pellets, the
thermal profile, the partial oxygen pressure, and the depth of the pellet bed or layer. In
this study, we address the influences, which the main parameters of the induration
process (namely drying, preheating, firing and cooling) have on the final product of
carbonaceous iron ore pellets. The stated influence has been studied via the
mathematical model of mass and heat exchanges in heterogeneous oxidation reactions
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