Naslov (eng)

Quality analysis of castings obtained by easily melted models

Autor

Mitrović, Milijana
Marjanović, Saša
Mladenović, Srba
Požega, Emina
Stamenković, Uroš
Petrović, Jasmina
Nedeljković, Milan

Publisher

Opis (srp)

Sažetak

Opis (eng)

Abstract y Casting with easily melted models is a new technology for making complex castings. It provides a number of advantages over other casting methods: increased metal utilization, reduction or elimination of the use of cores for the forming of inner surfaces, reduction of cleaning and machining of castings. The quality ofthe casting depends on the quality of the model, so that all errors that occur during the modeling process are reproduced on the casting. The paper presents the results of experimental research in which wax models were used. After molding the wax models and melting the wax in the dryer, the mold cavity was filled with liquid metal. The first series of castings was made from the alloy composition: Cu= 90.2%, Sn= 1.5%, Zn= 3.0%, Pb= 3.3% and Fe= 2.0%, while the second series was made from alloys known as red casting, with composition: Cu= 85%, Sn= 5%, Zn= 5% and Pb= 5%. Based on the obtained results, incompleteness was noticed on the candlestick from the second series of castings. The incompleteness was caused by insufficient drying of the wax mass, as a result of which it did not fully melt. The remaining wax reacted with the metal, which caused a defect. The quality of other castings is satisfactory, which is related to the externalernal appearance. Defects in the form of porosity are present, but minimal surface machinig allows to obtain castings with relatively smooth surfaces.

Jezik

engleski

Datum

2021

Licenca

© All rights reserved

Deo kolekcije (1)

o:179

Institut za rudarstvo i metalurgiju Bor