Granulation of Cu-Al-Fe-Ni Bronze

• Autorzy: Pisarek B. P.
• Języki publikacji: EN

Abstrakty

EN

With the increase in wall thickness of the casting of iron-nickel-aluminium-bronze, by the reduction of the cooling rate the size of &κ_II phase precipitates increases. This process, in the case of complex aluminium bronzes with additions of Cr, Mo and W is increased. Crystallization of big κII phase, during slow cooling of the casting, reduces the concentration of additives introduced to the bronze matrix and hardness. Undertaken research to develop technology of thick-walled products (g> 6 mm) of complex aluminium bronzes. Particular attention was paid to the metallurgy of granules. As a result, a large cooling speed of the alloy, and also high-speed solidification casting a light weight of the granules allows: to avoid micro-and macrosegregation, decreasing the particle size, increase the dispersion of phases in multiphase alloys. Depending on the size granules as possible is to provide finished products with a wall thickness greater than 6 mm by infiltration of liquid alloy of granules (composites). Preliminary studies was conducted using drip method granulate of CuAl10Fe5Ni5 bronze melted in a INDUTHERM-VC 500 D Vacuum Pressure Casting Machine. This bronze is a starting alloy for the preparation of the complex aluminium bronzes with additions of Cr, Mo, W and C or Si. Optimizations of granulation process was carried out. As the process control parameters taken a casting temperature t (°C) and the path h (mm) of free-fall of the metal droplets in the surrounding atmosphere before it is intensively cooled in a container of water. The granulate was subjected to a sieve analysis. For the objective function was assume maximize of the product of Um*n, the percentage weight "Um" and the quantity of granules 'n' in the mesh fraction...

Słowa kluczowe

EN

innovative foundry technologies; innovative materials; aluminium bronze; granulation; sieve analysis; microstructure; microhardness

PL

innowacyjne technologie odlewnicze; materiały innowacyjne; analiza sitowa; mikrostruktury; mikrotwardość

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2014
• Tom: Vol. 14, iss. 3
• Strony: 61--66
• Opis fizyczny: Bibliogr. 7 poz., fot., rys., tab., wykr.

Twórcy

autor

Pisarek B. P.

• Department of Materials Engineering and Production Systems, Lodz University of Technology 1/15 Stefanowskiego Street, 90-924 Lodz, Poland

Bibliografia

• [1] Pisarek, B. (2013). Aluminum bronzes with additions of, Cr, Mo and/or W with high resistance to wear Scientific Papers No. 1141, Scientific Dissertations. 441, Łódź: Ed. Lodz University of Technology.
• [2] Pisarek, B. (2007). The crystallization of the bronze with additions of Si, Cr, Mo and/or W. Archives of Materials Science and Engineering. 28(8), 461-466.
• [3] Karsten, D. & Hiller, W. (1971). Viewpoints concerning techniques and metallography of the metallurgy of granular material. Metall. 25(2), 122-125
• [4] Huimin, L. (2000). Science and engineering of droplets - Fundamentals and Applications. Norwich, New York: Noyes Publications/William Andrew Publishing, LLC. DOI:10.1115/1.1445335.
• [5] Górny, Z., Sobczak, J. (2005). Modern materials molding on the basis of non-ferrous metals. Kraków: ZA-PIS.
• [6] PN-ISO 565:2000 Test sieves - Fabric made of wire, perforated sheet metal and sheet metal perforated electrochemcally - nominal dimensions of the mesh.
• [7] Dietrich, E., Schulze, A. (2000). Statistical methods in the classification of the measuring equipment of machine and production processes. Warszawa: Notika System.