Conventional lost wax castings are produced using a hollow ceramic shell. The metal is poured in and the mould is allowed to cool, either at room temperature or with forced air cooling. The resultant investment casting was a rather unrefined grain structure so to optimize the mechanical properties of the casting, various heat treatment processes are undertaken. This could be simply an annealing process or may be more involved with parts being soaked at a specific temperature and potentially oil or water quenched. Mechanical properties can be found in the technical section on DGI's web site.
Labels: investment castings
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5 Comments:
Investment castings, or any type of casting for that matter usually need to be heat treated. It may just be a normalisation or annealing process to relieve stresses from the casting process or may be something more complicated to affect the structure or strength of the material.
Will an investment casting give you the same mechanical properties as a bar stock part?
Check out the technical information on the web site, it gives cross references of investment casting to other common references. The mechanicals are produced by the heat treatment and are the same for investment cast parts as they are for bar stock.
of cause, the heattreatment must be done after casting, otherwise, it's mechanical property will be bad.
the heat treament must be done after casting, otherwise the property will be bad. investment casting is only a good method to get a prcision dimensions.
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