Selection of the temperature of casting the bronzes to plaster moulds

• Autorzy: Pisarek B. , Pawlak M.
• Języki publikacji: EN

Abstrakty

EN

The results of the investigations of the process of solidification of the bronze CuSn5Zn5Pb5-C (B555) and CuSn10-C (B10) in the hot plaster mould show in the work. For four temperatures of casting: 1200 o C, 1180 o C, 1160 o C and 1140 o C was conducted the investi-gation: the size of contraction cavity, the fulfillment of the mould cavity formative the casts of test slats about the thickness: 4 mm, 0,8 mm and 0,5 mm. It was conducted the investigation the processes sets in the arrangement the cast-mould and X-ray analysis phase XRD of compound coming into being in indirect layer created among mould and cast in the result of the thermal decomposition of the anhydrite. It results that the temperature 1140 o C is the optimum temperature of casting the bronze to hot plaster mould from carried out investigations. The minimum thickness of the wall of the cast from the bronze B555 is 0.5 mm, and from the bronze B10 0.8 mm. The realization of casts about thinner walls is made difficult because of giving off formed gases in the result of the thermal decomposition of the anhydrite. The products of the decomposition of the anhydrite react with elements steps in the chemical composition of studied bronzes, create in the arrangement the cast-mould the indirect layer folded from: sulphites, sulphides, oxides and clean metals (Pb) or their compounds, especially Sn and Sb.

Słowa kluczowe

EN

innovative casting materials; innovative casting technologies; cast bronze; selection of the temperature of casting; plaster mould; thermal decomposition of anhydrite; X-ray analysis phase XRD

PL

materiały innowacyjne; technologie innowacyjne; odlewnictwo; brąz odlewniczy; temperatura odlewania; forma odlewnicza

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2009
• Tom: Vol. 9, iss. 4
• Strony: 203--208
• Opis fizyczny: Bibliogr. 5 poz., rys., wykr.

Twórcy

autor

Pisarek B.

autor

Pawlak M.

• Department of Materials Engineering and Production Systems, Technical University of Lodz, 1/15 Stefanowskiego Str., 90-924 Lodz, Poland,

Bibliografia

• [1] M. Pawlak: Influence of temperature and time of firing on the properties of gypsum. Research in Polish Metallurgy AT the Beginning of XXI Century. Committe of Metallurgy of the Polish Academy of Science, AKAPIT, Cracow, (2006), 287-293. (in Polish).
• [2] M. Pawlak, Z. Niedźwiedzki: Dilatometric studies of plaster sandmix in raw and heat treated state, Archives of Foundry, Polish Academy of Science, 2008, Vol. 3, N° 8, 145-148.
• [3] B. Pisarek, M. Pawlak: The thermal analysis and derivative bronzes cast to plaster moulds, Archives of Foundry Engineering, Vol. 9, Issue 3, June 2009, 159-168.
• [4] Z. Górny, J. Sobczak: Modern casting materials on the base of non-ferrous metals, ZA-PIS, Kraków (2005). (in Polish).
• [5] M. V. Gerasimov, Y. P. Dikov, O. I. Yakovlev, F. Wlotzka: High Temperature Vaporization of Gypsum and Anhydrites Experimental Results, Abstracts of the 25th Lunar and Planetary Science Conference, held In Houston, TX, 14-18, March 1994, p. 413.