RESOURCE SAVING IN FERROUS METALLURGY
INFORMATION TECHNOLOGIES AND AUTOMATIC CONTROL IN FERROUS METALLURGY
SHORT REPORTS
In this research the authors adduct the technique of determining the effect on the performance of the capture angle grinders with a plane-parallel movement of jaw by calculating the time required for crushing. The analysis of the edata shows that with increasing the angle of the capture at a constant degree of fragmentation while crushing is reduced and, thus, the productivity is increasing, which is confirmed experimentally.
METALLURGICAL TECHNOLOGIES
The necessity of taking into account the longitudinal stability of band during the work of the system of rolling stand – non-drive tool is snown. Proposed to determine the dependence of the distance between the roll cage and non driven tools, which provides longitudinal stability bars. Con- sidered from the perspective of the condition of the longitudinal stability of processes: rolling in the drive – non drive cage, rolling-the separation of the non-drive dividing tools and given appropriate recommendations.
The article examines the impact of parameters of impulse process on the quality of form and the castings. The results of study of the pressure effect over a mixture on the form durability and pressure on the model surface are given. A mathematical yield surface for the form durability depend- ing on hermetic criterion of model-flask accessory and pressure in the receiver in estimating the form parameters without an additional experimental investigation is constructed.
The results of research of influence of thickness of slag are presented on the different parameters of cooling of metal in a ladle capacity of 350 ton. The research is carried by means of two-dimensional mathematical model. By means of mathematical modeling the essential role of slag is es- tablished when cooling metal in a ladle, heat losses through slag are 60 – 70 %. Established and explained the phenomenon of “self-locking” heat of the metal in the ladle during the formation of a hard crust on the surface of the slag. The optimum thickness of the slag is 0,15 – 0,20 m. The results can be used in industrial practice in order to reduce heat losses during secondary treatment technology.
During the rolling of balls on ball-rolling mill deformation of the metal is in the rolls with screw gauges. In view of such a character of the rolling of deformation is concerned, and can be divided into the forming section, where the rolls bite the billet and reduce it gradually into the ball shape, and the finishing section, where the ball is rolled to the final size and severed from the rest of the billet. A normal process of rolling is provided for by designing the forming section of the pass groove. In the article outcomes the calculation of roll pass designed for rolling of balls. The calculation outcomes for roiling of balls 125 mm. The article provides the initial data for roll pass design of a ball mill.
TOPICAL COLLECTION OF ARTICLES «NANOSTRUCTURED MATERIAL SCIENCE»
Regularities of structure modification and changing wear resistance under boundary lubrication friction of 110Mn13 steel in as supplied condi- tion and after impact ultrasonic treatment were studied. The strain induced relief to form on lateral face of specimens under study at compression and triboloading were examined and similarity in regularities of its formation was shown.
The effect of aggressive media (solution NACE and H2SO4 ) on the dependence σ – ε, obtained by simultaneous transmission of electric current pulses accompanied by short discharge stress is investigated. The dependence of stress relief in the materials on the density of the pulsed electric current is established. The structural and morphological state of the alloy surface after exposure to corrosive media with different concentrations is investigated.
ISSN 2410-2091 (Online)