The Analysis of Molding and Modification of the Ceramic Surfaces and Its Impact on the Roughness of Castings

• Autorzy: Jesiotr M. , Myszka D. , Trzaskowski W.
• Języki publikacji: EN

Abstrakty

EN

The article presents an analysis of changes in the outer surface of the casting made in a modified ceramic form. The introduction of the modification in the inner surface of the form, as a metallic coating was intended to produce a high quality of the casting surface. To describe the results, the three parameters have been chosen to characterize the surface roughness, i.e. Ra, Rz and Rq. In implementing the popular method of casting was used, so – called the lost polymer models. The models made from different plastic materials are chemically and electrochemically coated with a layer of nickel. The next step was to remove the model from the form and pouring the liquid metal over it. The observation of the casting surface was performed by using the scanning electron microscope and a profilometer. As a result of these attempts a number of castings have been obtained with an outside layer generated of lower roughness than the casting made in the normal gypsum form. The proposed method can be called an innovative one because it reduces the technological cycle by one processing operation of investment casting. During the process of casting both the cast and the outer layer improving the properties of the manufactured product is being produced.

Słowa kluczowe

EN

nickel coating; roughness of casting surface; aluminum alloys; ceramic mold; polymer materials

PL

powłoka niklowa; chropowatość powierzchni; stopy aluminium; formy ceramiczne; materiały polimerowe

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2014
• Tom: Vol. 14, iss. 1 spec.
• Strony: 47--50
• Opis fizyczny: Bibliogr. 7 poz., fot., rys., tab.

Twórcy

autor

Jesiotr M.

• Faculty of Production Engineering, WUT, ul. Narbutta 85, 02-524 Warszawa, Poland

autor

Myszka D.

• Faculty of Production Engineering, WUT, ul. Narbutta 85, 02-524 Warszawa, Poland

autor

Trzaskowski W.

• Faculty of Materials Science, WUT, ul. Narbutta 85, 02-524 Warszawa, Poland

Bibliografia

• [1] R. Haratym, The processes of precise casting in ceramic forms (in polish: Procesy odlewania precyzyjnego w formy ceramiczne), Warszawa, Tempus (1997).
• [2] H. Saechtling, Plastics (in polish: Tworzywa sztuczne, Wydawnictwo) Naukowo-Techniczne, Warszawa (2000).
• [3] Praca zbiorowa, Electroplating Guide (in polish: Poradnik galwanotechnika), Wydawnictwo Naukowo-Techniczne, Warszawa (2006).
• [4] P. L. Bonora, M. Lekka, L. Creazzi. Coating Nanotechnology (in polish: Nanotechnologia w powłokach. Ochrona przed Korozją, (2003), 46(4), 130−131.
• [5] B. Kucharska, M. Trzaska, Corrosion resistance of composite layers Ni-P/MoS2 produced by chemical reduction on aluminum (in polish: Odporność korozyjna warstw kompozytowych Ni-P/MoS2 wytwarzanych metodą redukcji chemicznej na aluminium), Ochrona przed Korozją, (2010), 43(11), 590−592.
• [6] J.A. Weber, J. Socha, Fundamentals of electrodeposition of metal coatings (in polish: Podstawy elektroosadzania powłok metalowych), Instytut Mechaniki Precyzyjnej Monografie, Warszawa (2008).
• [7] M. Jesiotr, M. Tarnowski, B. Kucharska, D. Myszka, T. Wierzchoń, Production Nickel layer for precise casting models (in polish: Nakładanie warstw niklowych na modele do odlewnictwa precyzyjnego), Prace Instytutu Odlewnictwa, Kraków 2013.