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RESEARCH OF SPECIAL FEATURES OF BrOC2H3 BRONZE MELTING AND OF OBTAINING INGOTS BY THE METHOD OF DIRECTIONALCRYSTALLIZATION

Исследование особенностей плавки бронз марки БрО10С2Н3 и получения из них слитков методом направленного затвердевания
NUST MISiS Foundry Department studies the impact of crystallization conditions on the BrOC2H3 bronze ingots quality obtained by filling foundry. Quality control consists of several steps, specifically: quantity and size of scattered microporosity in the ingot body, quantity of disperced eutectoid element of the micro structure, bar macro structure, the size of sinkhole, eliquation of ligating elements in the ingot bulk. The control is effected by X-ray flaw detection, metallographic and spectrum analysis. Besides researching traditional parameters impact (such as external dimensions, configuration and bar weight; hot metal refining preliminary operations, foundry temperature and speed; casting form presurface preparation , swabbing; heat insulation of exterior part of ingot) less common approaches are studied as well. Specifically, the research studies ingot crystallizing speed and crystallizing front movement vector (directional crystalliztion from the bottom of the ingor and bulk crystallization by Lavrov Method). The studies also cover ingot crystallization by ulrasonic oscillation superposition on the casting form. Special attention is paid to ProCast software simulation of foundry processes, especially the size of sinkhole and scattered porosity in the ingot bulk. Presently the outcomes of the research are presented in the below publications: 1. Gerasimenko E.A. Konovalov A.N. Belov V.D. BrOC2H3 bronze ingots crystallization when casting in the form with bottom water cooling. Russian Founder – 2013 №7 p.15-17 2. Gerasimenko E.A. Konovalov A.N. Belov V.D., Guseva V.V. Technology development to obtain high quality BrOC2H3 bronze ingots by directional crystallization with the help of ultra sound. Advanced Foundry Technologies. 7th International conference, NUST MISiS – 2013.


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