08-06-2013, 09:02 AM
not so after you cut the skin off of it and see the inside, its full of microscopic porosity that won't affect the part strength wise but would make it harder then all get out to polish, I throwed in some new unmelted car wheel into the pot and all the curd and clearcoat on it contributes to this problem.
this is what I mean
![[Image: porosity-in-casting.jpg]](http://i1222.photobucket.com/albums/dd484/Superdave257/porosity-in-casting.jpg)
another problem that contributes to this is I ran out of propane in the bottle I was using and had to switch to a different one which causes problems, nice thing is that not only me but the whole aluminum casting industry has this problem just the big guys have the tools to get rid of the absorbed gas.
I don't have the equipment nor can I afford to buy argon to flush the molten metal with.
this is what I mean
![[Image: porosity-in-casting.jpg]](http://s1222.photobucket.com/user/Superdave257/media/porosity-in-casting.jpg.html)
another problem that contributes to this is I ran out of propane in the bottle I was using and had to switch to a different one which causes problems, nice thing is that not only me but the whole aluminum casting industry has this problem just the big guys have the tools to get rid of the absorbed gas.
I don't have the equipment nor can I afford to buy argon to flush the molten metal with.
dallen, proud to be a member of MetalworkingFun Forum since Apr 2012.
If life seems normal, your not going fast enough!
If life seems normal, your not going fast enough!