Test for Casting Cleanliness
Test for Casting Cleanliness
(OP)
Is there a standard method for determining the cleanliness of a casting? I have heard of a procedure involving washing of the casting in a solvent then collecting the solvent, evaporating it off and then collecting and performing an evaluation of the residue, however I cannot find a reference to the procedure.





RE: Test for Casting Cleanliness
RE: Test for Casting Cleanliness
RE: Test for Casting Cleanliness
RE: Test for Casting Cleanliness
1) inclusion count with the help of a microscope (solid sample)
2) detection of inclusions in the molten metal with a) ultrasound, b) electrical resistivity, or other refractory filter based filtration methods,
3) chemical analysis of inclusion forming elements.
etc.
RE: Test for Casting Cleanliness
RE: Test for Casting Cleanliness
We do this as a rough check in the lab. Basically we stop filtering when the last paper doesn't show anything. E.G. do a 25 micron, 10 micron. 5 micron and if the 5 is clean then stop. If the 5 is dirty then go on to a 2.5 and so on.
You can also measure flow through a filter paper. As the paper gathers crud the flow slows down.
If we are serious we use an outside lab and they have a laser counter. Try the yellow pages and tell them what you want to do.
Tom