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dc.contributor.authorPisarek, Bogusław
dc.date.accessioned2016-02-03T10:04:45Z
dc.date.available2016-02-03T10:04:45Z
dc.date.issued2014
dc.identifier.citationArchives of Foundry Engineering, Vol. 14, Issue 3, Pages 61–66
dc.identifier.urihttp://hdl.handle.net/11652/1069
dc.identifier.urihttp://www.degruyter.com/view/j/afe.2014.14.issue-3/afe-2014-0063/afe-2014-0063.xml?format=INT
dc.description.abstractWith the increase in wall thickness of the casting of iron-nickel-aluminium-bronze, by the reduction of the cooling rate the size of κII phase precipitates increases. This process, in the case of complex aluminium bronzes with additions of Cr, Mo and W is increased. Crystalliza-tion of big κII phase, during slow cooling of the casting, reduces the concentration of additives introduced to the bronze matrix and hard-ness. 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 pro-cess control parameters taken a casting temperature t (°C) and the path h (mm) of free-fall of the metal droplets in the surrounding atmos-phere 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. The maxi-mum value of the ratio obtained for mesh fraction a sieve with a mesh aperture of 6.3 mm. In the intensively cooled granule of bronze was identified microstructure composed of phases: β and fine bainite (α+β'+β'1) and a small quantity of small precipitates κII phase. Get high microhardness bronze at the level of 323±27,9 HV0,1.en_EN
dc.language.isoenen_EN
dc.relation.ispartofseriesArchives of Foundry Engineering, Vol. 14, Issue 3, 2014en_EN
dc.subjectInnovative foundry technologies and materialsen_EN
dc.subjectComplex aluminium bronzeen_EN
dc.subjectGranulationen_EN
dc.subjectSieve analysisen_EN
dc.subjectMicrostructureen_EN
dc.subjectMicrohardnessen_EN
dc.subjectinnowacyjne technologie odlewniczepl_PL
dc.subjectmateriały innowacyjnepl_PL
dc.subjectanaliza sitowapl_PL
dc.subjectmikrostrukturypl_PL
dc.subjectmikrotwardośćpl_PL
dc.titleGranulation of Cu-Al-Fe-Ni Bronzeen_EN
dc.typeArtykułen_EN


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