Wyniki wyszukiwania - BazTech

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Developing the inoculation procedure for high-quality cast iron with flake graphite, intended for large-size casting (bottom or distance plates and counterweights) – produced in Krakodlew Foundry S.A.

Guzik Edward, Świątkowski Adrian, Szczęsny Andrzej, Kopyciński Dariusz, Mirek Piotr, Piotrowski Krzysztof

Technical Transactions

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2023

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Vol. 120, iss. 1

art. no. e2023009

EN

This article presents the first part of the research on the production of large-sizecastings, such as bottom plates and counterweights produced in the KrakodlewS.A. foundry. Castings of this type are not complicated in terms of construction butmust meet certain requirements, namely to be able to withstand the effects of hightemperature and associated stresses, or to have specific dimensions and weight inthe case of counterweights. In both cases, the most common method of formingcastings is horizontal moulding. However, this requires a lot of time for machiningthe finished castings. Forming heavy castings in a vertical orientation, although muchmore problematic, can mean that the amount of time required for machining may bereduced. The research presents the effect of overheating temperature on the effectsof inoculation with the Zircinoc inoculant, in which it was shown that increasing thetemperature by fifty degrees increased the amount of eutectic grains by around11–15%.

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Application of Liquid Glass Mixtures with Improved Knocking-Out Ability in Castings Production for Railway Transport

Svinoroev Y., Batyshev K., Deev V., Semenov K., Bykadorov V., Prusov E.

Archives of Foundry Engineering

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2019

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iss. 3

27--32

EN

Analysis of the use of the Russian materials (liquid glass and softening additives) has been made in accordance with the modern requirements for use in the technological processes of casting as binding materials in the production of large-sized steel railway casting. The reasons for poor knockout of liquid glass mixtures have been investigated. A complex action softening additive has been recommended for a better knocking-out ability. This solution provides a softening effect at the points of maximum formation of the liquid glass matrix strength in the processes of polymorphic transformation of the material under the influence of elevated temperatures as the result of filling the mold cavity by the melt. It has been shown that the use of additives of complex action leads to the decrease in the specific work of the knockout by four – seven times depending on the composition of the mixture and the design features of the casting. Experimental-industrial tests of the proposed method for softening the liquid glass mixtures have been made and the "Front Buffer Stop" casting has been made (for the rolling stock of locomotives and railway wagons). The tests confirmed the effectiveness and expediency of implementation of new liquid glass mixtures with softening additives in conditions of foundry enterprises.

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Numeryczna analiza przepływów w wybranych fragmentach układów wlewowych stosowanych przy wytwarzaniu odlewów wielkogabarytowych

Goraj T., Szucki M., Lelito J., Suchy J. S.

Archives of Foundry Engineering

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2014

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Vol. 14, iss. 4 spec.

25--30

PL

Niniejsza praca zawiera analizę przepływów dwufazowych (ciekły metal - gaz) w wybranym fragmencie układów wlewowych, stosowanych przy produkcji wielkogabarytowych odlewów ze stopów żelaza, w oparciu o symulacje komputerowe wykonane w programie FLOW-3D. W ramach publikacji dobrano układy modelowe oraz parametry symulacji numerycznych. Na podstawie uzyskanych wyników badań szczegółowo przestudiowano rozkład prędkości i ciśnienia w tych układach oraz wskazano obszary narażone na erozję materiału ceramicznego i miejsca kumulowania się gazów.

EN

Current work includes an analysis of the two-phase flows (liquid metal - gas) in a selected parts of the gating systems, used in large-size iron castings production. The studies were carried out with the use of FLOW-3D software. Within the paper a model system and the parameters of numerical simulations were selected. Based on the obtained results, the velocity and pressure profile in the model systems were analyzed as well as the areas susceptible to erosion of the ceramic material and gas entrainment were indicated.

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Materiały izolacyjne zwłaszcza dla odlewów wielkogabarytowych ze stopów żelaza

Ignaszak Z., Klewski M.

Przegląd Odlewnictwa

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2000

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Vol. 50, z. 5

165-169

PL

W artykule przedstawiono wyniki laboratoryjnych i odlewniczych badań termofizycznych cech materiałów izolacyjnych o osnowie wieloskładnikowej. Wykorzystano je do optymalizacji tych cech, z założeniem wytwarzania wyrobów izolacyjnych w warunkach produkcji seryjnej. Wykorzystano wyniki prac badawczych i wdrożeniowych zrealizowanych przez zespół Autora w zakresie materiałów izolacyjnych, w odlewniach krajowych i zagranicznych. Równolegle wykorzystano także przemysłowe doświadczenie PMO w produkcji izolacyjnych płyt wlewnicowych. Materiałom nadano postać taśm złożonych z płyt. Ich produkcją podjęło Przedsiębiorstwo Materiałów Ogniotrwałych w Krakowie we współpracy z zespołem z Politechniki Poznańskiej. Materiały były już testowane na odlewach o masie 30 ton (odlew + nadlew) i są oferowane do stosowania w wielkogabarytowym odlewnictwie staliwa i żeliwa. Jakość płyt dorównuje wyrobom tego rodzaju z najlepszych wytwórni europejskich.

EN

In the article the results of laboratory and foundry thermophysical examinations of the characteristic features of multicomponent matrix insulating materials are presented. These results have been used in optimization of those features ass-ming that insulating products are manufactured under the conditions of series pr-duction. To this purpose served the results of research and implementation works carried out by the Author's team in the scope of insulating materials at the domestic and foreign foundries. The industrial experience of Przedsiebiorstwo Materiałów Ogniotrwałych (PMO) in Kraków in production of insulating ingot mould bottom plates has been used as well. The materials have been given the shape of strips composed of plates. They will be produced by PMO in cooperation with the Technical University of Poznan. The materials have already been tested on castings with the mass of 30 tons (casting + riser) and are offered for use in production of large-size steel and iron castings. The quality of plates is equal to this kind of products manufactured by the best European plants.