Archives of Foundry Engineering continues the publishing activity started by Foundry Commission of the Polish Academy of Sciences (PAN) in Katowice in 1978. The initiator of it was the first Chairman Professor Dr Eng. Wacław Sakwa – Corresponding Member of PAN, Honorary Doctor of Czestochowa University of Technology and Silesian University of Technology. This periodical first name was „Solidification of Metals and Alloys” , and made possible to publish the results of works achieved in the field of the Basic Problems Research Cooperation. The subject of publications was related to the title of the periodical and concerned widely understand problems of metals and alloys crystallization in a casting mold. In 1978-2000 the 44 issues have been published. Since 2001 the Foundry Commission has had patronage of the annually published “Archives of Foundry” and since 2007 quarterly published “Archives of Foundry Engineering”. Thematic scope includes scientific issues of foundry industry:
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0000-0003-2078-196X 0000-0002-3011-4434 0000-0002-4449-532X, AGH University of Technology, Kraków, Poland 0000-0003-0201-7191, PTIMA National Academy of Sciences of Ukraine, Kiev, Ukraine 0000-0002-8878-1037, AGH University of Technology, Kraków, Poland 0000-0002-6826-995X , Thapar University, Punjab, India 0000-0001-5198-3551, DTU in Lyngby, Denmark 0000-0002-6170-4728, VSB - Technical University of Ostrava, Ostrava, Czech Republic 0000-0001-8504-3744, University of Occupational Safety Management, Katowice, Poland 0000-0003-3555-2318, Silesian University of Technology, Gliwice, Poland 0000-0002-2675-1836, TU Bergakademie Freiberg, Freiberg, Germany 0000-0003-4901-7746, Warsaw University of Technology, Warszawa, Poland 0000-0002-9795-2352, TU Bergakademie Freiberg, Freiberg, Germany 0000-0003-2434-6025, AGH University of Technology, Kraków, Poland 0000-0002-7433-4092, Rzeszow University of Technology, Rzeszów, Poland 0000-0002-7374-9763, University of Zilina, Zilina, Slovak Republic 0000-0001-8912-2132, Universidade Federal de Uberlandia, Uberlandia, Brazil 0000-0001-6682-2611, AGH University of Technology, Kraków, Poland 0000-0002-6988-3329, AGH University of Technology, Kraków, Poland 0000-0003-0917-1810, Brno University of Technology, Brno, Czech Republic 0000-0001-6428-8961, Sardar Vallabhbhai Patel Institute of Technology, Vasad, Gujarat, India 0000-0001-8598-6953, Silesian University of Technology, Gliwice, Poland 0000-0001-6991-9793, Indian Institute of Technology, Kharagpur, India 0000-0002-5131-3483, Technical University Dresden, Dresden, Germany 0000-0002-0555-370X , Brno University of Technology, Brno, Czech Republic 0000-0002-0005-5314, CNR, Genova, Italy 0000-0002-4040-2798, Politehnica University of Bucharest Bucharest, Romania 0000-0002-7628-3524, University of Zilina, Zilina, Slovak Republic 0000-0003-3622-843X, Silesian University of Technology, Gliwice, Poland 00000002-7689-259X, Western Michigan University, Kalamazoo, MI, USA 0000-0003-3897-070X, Okayama University, Okayama, Japan 0000-0003-2287-9346, Technical University of Liberec, Liberec, Czech Republic 0000-0001-6521-2037, The University of Queensland, Brisbane, Australia 0000-0002-3024-9005, Jönköping University, Jönköping, Sweden 0000-0001-6903-328X, Silesian University of Technology, Gliwice, Poland 0000-0002-7019-3966, Silesian University of Technology, Gliwice, Poland 0000-0001-7840-5575, Silesian University of Technology, Gliwice, Poland 0000-0003-1683-0001, Silesian University of Technology, Gliwice, Poland 0000-0002-3229-6470, Silesian University of Technology, Gliwice, Poland
It was found that the addition of carbon fibers (CFs) does not affect the crosslinking process in the microwave radiation (800 W, 2.45
GHz) of the BioCo2 binder, which is a water solution of poly(acrylic acid) and dextrin (PAA/D). It has influence on BioCo2 thermal
properties. The CFs addition improves the thermostability of a binder and leads to the reduction of gas products quantity generated in the
temperature range of 300-1100°C (TG-DTG, Py-GC/MS). Moreover, it causes the emission of harmful decomposition products such as
benzene, toluene, xylene and styrene to be registered in a higher temperatures (above 700°C). BioCo2 binder without CFs addition is
characterized by the emission of these substances in the lower temperature range. This indicates the positive effect of carbon fibers
presence on the amount of released harmful products.
The selected technological tests (permeability, friability, bending strength, tensile strength) have shown that the moulding sand with the
0.3 parts by weight carbon fibers addition displays the worst properties. The addition of 0.1 parts by weight of CFs is sufficient to obtain a
beneficial effect on the analyzed moulding sands properties. The reduction of harmful substances at the higher temperatures can also be
observed.
The paper concerns experimental work studying chemical composition, structures and selected mechanical properties of castings produced by rheocasting method SEED. After previous experiments, which showed inclusions in the primary phase α(Al) when observing structures, hypothesis of external nuclei was taken. The main goal of the work was to determine the influence of inoculation by various additions of titanium/boron based inoculant on the structure and properties of AlSi7Mg0,3 alloy. The master alloy AlTi5B1 was added in amounts of 0,05, 0,1, 0,15, 0,2 wt %. Metallographic observation by light and SEM microscopy was used for analysing the structures. Measurements of grain size were realised and evaluated. Brinell hardness measurements were performed. Chemical composition was measured by GDS analysis. Undertaken experiments did not prove the effect of inoculation of combined AlTi5B1 master alloy on castings made of AlSi7Mg0,3 alloy made by rheocasting SEED at given amounts and conditions.
Foundry technologists use their own style of gating system designing. Most of their patterns are caused by experience. The designs differ from plant to plant and give better or worse results. This shows that the theory of gating systems is not brought into general use sufficiently and therefore not applied in practise very often. Hence, this paper describes the theory and practical development of one part of gating systems - sprue base for automated horizontal moulding lines used for iron castings. Different geometries of sprue bases with gating system and casting were drawn in Solid Edge ST9. The metal flow through the gating systems was then simulated with use of MAGMA Express 5.3.1.0, and the results were achieved. The quality of flow was considered in a few categories: splashes, air entrapment, vortex generation and air contact. The economical aspect (weight of runner) was also taken under consideration. After quantitative evaluation, the best shape was chosen and optimised in other simulations with special attention on its impact on filling velocity and mould erosion. This design (a sprue base with notch placed in drag and cope) is recommended to be used in mass production iron foundries to reduce oxide creation in liquid metal and especially to still metal stream to improve filtration.
Constantly developing production process and high requirements concerning the quality of glass determine the need for continuous improvement of tools and equipment needed for its production. Such tools like forms, most often made of cast-iron, are characterized by thick wall thickness compared to their overall dimensions and work in difficult conditions such as heating of the surface layer, increase of thermal stresses resulting from the temperature gradient on the wall thickness, occurrence of thermal shock effect, resulting from cyclically changing temperatures during filling and emptying of the mould. There is no best and universal method for assessing how samples subjected to cyclic temperature changes behave. Research on thermal fatigue is a difficult issue, mainly due to the instability of this parameter, which depends on many factors, such as the temperature gradient in which the element works, the type of treatment and the chemical composition of the material. Important parameters for these materials are at high temperature resistance to thermal shock and thermal fatigue what will be presented in this paper.
Cast axes are one of the most numerous categories of bronze products from earlier phases of the Bronze Age found in Poland. They had multiple applications since they were not only used objects such as tools or weapons but also played the prestigious and cult roles.
Investigations of the selected axes from the bronze products treasure of the Bronze Age, found in the territory of Poland, are presented
in the hereby paper. The holder of these findings is the State Archaeological Museum in Warsaw. Metallurgical investigations of axes with bushing were performed in respect of the casting technology and quality of obtained castings. Macroscopic observations allowed to document the remains of the gating system and to assess the range and kind of casting defects. Light microscopy revealed the microstructure character of these relicts. The chemical composition was determined by means of the X-ray fluorescence method with energy dispersion (ED-XRF) and by the scanning electron microscopy with X-ray energy dispersion analysis in micro-areas (SEM-EDS). The shape and dimensions of cores, reproducing inner parts of axes were identified on the basis of the X-ray tomography images. Studies reconstructed production technology of the mould with gating system, determined chemical composition of the applied alloys and casting structures as well as revealed the casting defects being the result of construction and usage of moulds and cores.
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Account holder: Stowarzyszenie Wychowankow Politechniki Slaskiej Kolo Odlewnikow
Account holder address: ul. Towarowa 7, 44-100 Gliwice, Poland
Account numbers: BIC BPKOPLPW IBAN PL17 1020 2401 0000 0202 0183 3748
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