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Study of the Production of Copper Matrix Composites Using Lubricant Phase Particles

  • : Juszczyk, B1
  • : 1Institute of Non Ferrous Metals
  • : PDF Download
  • : 2012

Abstract

The paper presents the results of a study on selection of parameters for copper matrix composite materials production to be used in rolling bearings. Object of the study were copper alloys containing graphite and tungsten disulphide (WS2) lubricating phase particles. The metal matrix for composite materials was alloys from Cu-Sn(Zn) system. The mass fraction of lubricating phase particles amounted to between 5 and 20%. The process of production of the studied materials included processes taking place with complete or partial presence of liquid phase and in two simultaneous ways. For production of composites used were both the method of classical powder metallurgy and melting and casting method with simultaneous stirring, i.e. stir casting. Lubricating phase particles heated to 200�C were added to liquid metal bath, and then stirring process was held using a constant rotational stirrer speed equal to 1500 rpm. The process to obtain composites using powder metallurgy included stirring bronze powders and particles of non-metal phases, and subsequently their consolidation. The process of sintering was held in the temperature from 750�800�C range. The created alloys were subjected to physical and tribological tests using high-temperature tribometer from CSM Instruments. Qualitative analysis of structure was performed as well.
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