THE INFLUENCE OF SELECTED ALLOYING ELEMENTS ON THE MICROSTRUCTURE, SELECTED MECHANICAL AND TECHNOLOGICAL PROPERTIES OF BRASSES

Janusz Kozana, Stanisław Rzadkosz, Aldona Garbacz-Klempka, Marcin Piękoś, Witold Cieślak

Abstract


The research aimed at assessing the influence of alloying elements, such as aluminium, silicon, nickel as well as lead and bismuth on the chosen alloys of Cu-Zn. Microstructures were examined with the help of optical and scanning microscopy with X-ray microanalysis. The properties of the received alloys were determined with regard to changes in the chosen mechanical parameters, namely  Rm, A5, HB, also, machinability changes were assessed as well as proclivity to hot  fracturing  of Cu-Zn alloys with additives of lead and bismuth.

The results indicate the possibility of obtaining, within the alloys analysed, very high mechanical properties: Rm up to 700 MPa, hardness within the range of 130 – 180 HB and A5 from 3 to 30 %.

Also, in the case of the researched alloys, the machining and hot fracturing results  look promising.


Keywords


Cu-Zn alloys; mechanical properties; technological properties; alloying additives

Full Text:

PDF

References


Kozana J., Rzadkosz S., Piękoś M.: Assessment of aluminium and silicon influence on strength properties and a microstructure of nickel brasses. Archives of Foundry Engineering, 8, 4, 2008, pp. 81–86

Miernik M.: Skrawalność metali. Metody określania i prognozowania. Wydawnictwo Politechniki Wrocławskiej, Wrocław 2000

Adamski C., Rzadkosz S.: Metalurgia i odlewnictwo metali nieżelaznych. Stopy cynku oraz stopy miedzi. Wydawnictwa AGH, Kraków 1992

Dobrzański L. A.: Metalowe materiały inżynierskie. WNT, Warszawa 2004

Rzadkosz S., Cieślak W., Piękoś M., Kozana J.: Effect of modification on the intercrystalline cracks forming in CuZn38PbAl brass castings. XXVII konferencja naukowa z okazji Święta Odlewnika 2003, pp. 47–52




DOI: https://doi.org/10.7494/mafe.2013.39.2.37

Refbacks

  • There are currently no refbacks.