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and technology of, Ukraine

Kargin S.B.,Priazovskyi State Technical University
Metallurgical and Mining Industry | Year: 2015

The article deals with description of advantages of application of 3 and 4-rayed ingots for forging of shafts n comparison with round-shaped ingots. The design of profiled heads and a mode for broaching for forging 3 and 4-rayed ingots from a standard ingot was developed. The article presents the results of experimental investigations regarding the comparison of the character of distributions of deformations, the degree of removal of axial defects, alternation of the grain size at forging of shafts from round shaped and 3-4-rayed ingots. The appropriate recommendations were given regarding new processes of forging of, the essence of which is in elimination of the necessity to perform upsetting operations, due to application of profiled heads for preliminary ingot forging into 3 and 4-rayed ingots. © Metallurgical and Mining Industry, 2015.

Chigarev V.,Ukrainian Academy of Sciences | Chigarev V.,Priazovskyi State Technical University | Rassokhin D.,Priazovskyi State Technical University
Metallurgical and Mining Industry | Year: 2014

This paper is devoted to an analytical study of wall deformations of slag car pan during its operation. Distribution pattern of deformations in the pan body in the case of its manufacturing of standard material (steel 30) and with the usage of point alloying in the support ring area is determined. © Metallurgical and Mining Industry.

Kharlashin P.S.,Priazovskyi State Technical University | Mohammed A.K.,Priazovskyi State Technical University | Kuzemko R.D.,Priazovskyi State Technical University
Metallurgical and Mining Industry | Year: 2015

The results of numerical calculations of the equilibrium two-phase flow into shotcrete - tuyere with output of the gunite - mass at different levels along its length are given. It is defined that at such constructive solution of pressure, velocity, density of the gas suspension changes abruptly. It is shown that if the tuyere body becomes heat exchanger, the energy potential of gas-dispersed flow increases significantly.To reduce the potential loss of compressed gas suspension flow, it is recommended to build a pipe of tuyere pit of steplike type. © Metallurgical and Mining Industry, 2015.

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