That scrap casting sitting on your shop floor with the unexplained gas porosity might have nothing to do with your melt chemistry. More often than engineers want to admit, the real culprit sits in the molding sand hopper.Foundry sand is far from an off-the-shelf...
You cut the casting open to find a cluster of dark, round voids staring back at you. Whether it's gas porosity or shrinkage, the part fails inspection either way. The fixes couldn't be more different, though, and guessing wrong means chasing the wrong root cause for...
A casting comes out of the mold looking perfect. Then QC cuts it open, or worse, it fails in service, and there's a cavity sitting right where the wall was thickest. metal casting shrinkage is pure physics. Every alloy contracts through three distinct stages as it...
