Titanium and Magnesium Investment Casting Technology for Foundries

The CSIR has technology packages to enable a foundry to face coat slurry in order to produce a ceramic shell mould for investment casting that can be used for reactive alloy casting including Titanium alloys and Magnesium.

Technical Field/Operating Unit or Centre:

Investment casting / Materials Science and Manufacturing

Technology Description: 

The investment casting process is the only metal casting process that can produce complicated shapes in high temperature alloys to a very high quality standard repeatedly and as such is used for the manufacture of turbine blades for gas turbine engines. It is also used for complex thin walled aluminium structures such as electronic housings.

The shell system and the shell technology, including the control, maintenance, composition and operation, have the biggest effect on the quality of the casting. The shell system comprises a face coat system and a back-up system to produce the shell mould. Apart from the quality of the wax pattern, the composition of the slurry and the stucco’s used for the shell manufacture as well as the physical properties of the slurries, controls the surface finish of the casting and the definition of the features of the casting.

The CSIR has technology packages to enable a foundry to face coat slurry in order to produce a ceramic shell mould for investment casting that can be used for reactive alloy casting including Titanium alloys and Magnesium.

The technology further describes the equipment, safety equipment, procedure, disposal and  heat treatment for the chemical milling of the surface of an investment cast titanium component, to remove the hard alpha case from the surface of the cast.

Contact:  Delon Mudaly

 

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