TitleEffect of Atmosphere in a Foundry Mould on Casting Surface Quality
Journal titleArchives of Foundry Engineering
KeywordsSand mould ; Defects on casting surface ; Hydrogen concentration ; Ductile iron
Divisions of PASNauki Techniczne
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:
- Theoretical Aspects of Casting Processes,
- Innovative Foundry Technologies and Materials,
- Foundry Processes Computer Aiding,
- Mechanization, Automation and Robotics in Foundry,
- Transport Systems in Foundry,
- Castings Quality Management,
- Environmental Protection.
Changes of gas pressure in the moulding sand in the zone adjacent to mould cavity were analysed during pouring of cast iron. No significant effect of pressure on the surface quality of castings was observed. In the second series of tests, the concentration of hydrogen in the gas atmosphere was measured. It has been found that the value of this concentration depends on metal composition and is particularly high in cast iron containing magnesium. This is due to the reduction of water vapour with the element that has high affinity to oxygen. The presence of hydrogen causes the formation of gas-induced defects on the casting surface.
PublisherThe Katowice Branch of the Polish Academy of Sciences
TypeArtykuły / Articles
ReferencesMonroe R. (2005), Porosity in Castings, AFS Trans, 04. ; Zych J. (2005), Nakłucia w odlewach motoryzacyjnych wytwarzanych z żeliwa sferoidalnego w technologii in-mold, null, 7. ; Scraber P. (2006), Avoiding gas defects through mold and core package design, Modern Casting, 96, 12, 38. ; Chojecki A. (null), Gas Evolution from the heated bentonite-bonded Moulding Sand search, Int. Journal of the Cast Metals Research, 1102R. ; Chojecki A. (2011), Gas pressure in sand mould poured with cast iron, Archives of Foundry Engeenering, 11, 1, 9. ; Mocek J. (2011), Changes of gas pressure in sand mould during cast iron pouring, Archives of Foundry Engineering, 11, 4, 87. ; Chojecki A. (2011), Thermochemical study of the gas atmosphere in sand mould, Archives of Foundry Engineering, 9, 1, 135. ; Orlenius J. (2008), Gas absorption in gray iron during mould filling, Int. Journal of Cast Metals Research, 21, 427, doi.org/10.1179/136404608X373140 ; Chojecki A. (2010), Hydrogen in reoxidation process, Technolog, 2, 71.