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Casting of aluminum alloys

  • Author:Anna
  • Source:www.diecastingpartsuppl
  • Release on:2014-11-03


 

Aluminium and its alloys are cast predominantly classic sand molds and permanent molds in molding.

 

Aluminium casting. Relatively high shrinkage alloys and low strength properties at temperatures close to the solidus temperature, forms require compliance and good heat dissipation capacity. Best goes Casting of aluminum alloys in the form on-wet. cast aluminum may contribute to the emergence of hot cracks.

 

In sand molds often use profit and refrigerators. Profit is placed as close as possible to the places of power. Refrigerators are used to eliminate the shrinkage of pores and hot cracking, and to grind structures increase the density and strength properties of the castings; installing them should be closely linked to the location of the profits, in accordance with the principle of directional solidification.

Propensity aluminum oxidation and dross formation requires, in principle, the siphon filling and not too fast the metal flow in the channels, especially in sprue-feeder. Filling of the mold cavity must be calm. Given the need for big profits, sprue riser usually make high.