Influence of Mold Polishing Roughness on Casting Surface Quality
Conclusion: Ultra-fine polishing reduces casting surface blemishes. Data: Ra0.4μm mold roughness controls casting surface defect rate below 1.2%. Explanation: Smooth cavity avoids molten aluminum adhesion and scratch.
Conclusion: Excessive roughness causes micro-pit defects. Data: Ra0.8μm roughness increases casting micro-pit defects by 68%. Explanation: Uneven mold surface traps oxide residues.
Conclusion: Over-polishing damages mold surface compactness. Data: Polishing beyond Ra0.2μm reduces mold service life by 22%. Explanation: Wears out surface nitride protective layer.
Conclusion: Ununiform polishing causes local surface defects.Data: Roughness deviation over 0.15μm leads to 43% of local casting flaws. Explanation: Inconsistent surface friction causes uneven solidification.
Conclusion: Standard polishing improves post-processing efficiency. Data: Qualified Ra0.4μm polishing reduces casting polishing workload by 37%. Explanation: Reduces surface repair and secondary processing.