Team Rautomead - Completed 25mile walk for charity.
Team Rautomead – Donning Kilts and Walking 25 miles (40km) for Charity
Characteristics of Hypoeutectic Cu-Zr Alloy Rods Manufactured by Vertical Upwards Continuous CastingPosted on 9th of June
Ideally, copper alloys used in miniaturized electronic devices should exhibit a combination of high strength and high electrical conductivity. The authors of the present study have previously reported on: (i) the fine dendrite microstructureof hypoeutectic Cu-x at% Zr (x = 0.5–5) alloys created by copper mold casting (CMC), (ii) the change in this microstructure with heavy wire-drawing to a lamellar structure of nanometer-scale layers of copper and a Cu/Cu-Zr intermetallic eutectic phase, and (iii) the good balance between strength and electrical conductivity that these drawn-wires exhibit1-3). Despite this, the mold sizes available for CMC greatly limit the potential for rapid solidification, thus making CMC unsuitable for mass production.
The focus in this study is therefore on applying a vertical upwards continuous casting (VUCC) mass-production method to the pilot-scale manufacturing of Cu-Zr alloy rods. The microstructure and physical characteristics of these VUCC rods were subsequently investigated and compared with rods produced by CMC. In addition, the wire-drawing capability of the VUCC rods was examined, and the adaptability of the VUCC method to the mass production of hypoeutectic Cu-Zr alloys was fully investigated.
Effect of water flow rate, casting speed, alloying elements and pull distance on tensile strength, elongation percentage and microstructure of continuous cast copper alloysPosted on 9th of June
Most parameters that control the solidification of castings, and consequently,
microstructure and mechanical properties, are: chemical composition, liquid metal treatment,
cooling rate and temperature gradient. In this work, characterization of the influence
of water flow rate, casting speed, alloying element and pull distance on tensile strength,
elongation percentage and microstructure of continuous cast copper alloys has been carried
out. A significant different in tensile strength, elongation percentage and grain structure
has been investigated and it was also found that these parameters could improve the physical
and mechanical properties of samples. As a particular example, water flow rate could
improve the elongation of samples from 10% to 25%.
The main objective of this paper was to assess three leaded
brass samples (pending application with Copper Development
Association) using optical microscopy and mass
spectrometry to compare the distribution of lead. Based on
the mass spectrometry data, a great deal of variation was
not found within each of the samples based on five different
sample locations. Optical microscopy, scanning electron
microscopy and energy-dispersive X-ray spectroscopy
confirmed that the lead was homogenously distributed in
Sealed lid casting technology for production of complex copper alloys containing Cr, Zr, Ti, Mg, Fe. For further information click here