End to End Offering in Aluminium Casting Process
Melt Treatment - Copper & Copper Based Alloys
Copper Melting Process
Copper foundries are highly specialised companies that deal with many different types of castings and alloys. To acknowledge this diversity, Foseco have developed a wide range of products for the melting and casting of copper based alloys and for mould and core making. All Foseco products are supported by a team of technical experts who can advise and help clients to develop an optimised process.
The main types of alloys requiring melt treatment are high conductivity copper, commercial copper, brasses, gunmetals, aluminium bronzes and copper nickels. The melting of bronzes and copper based alloys presents special problems. Molten copper dissolves both oxygen and hydrogen and on solidification, the oxygen and hydrogen can combine to form water vapour (steam reaction) which causes porosity in the casting.
Without the presence of oxygen, hydrogen alone may also cause gas porosity. Alloys containing aluminium form oxide skins which can cause problems in castings. In some other alloys, traces of aluminium may cause defects and residual aluminium must be removed. Special melting and melt treatment techniques have been developed to deal with these effects. These include fluxing, degassing and deoxidation treatments
