Casting Aluminum Fabrication Services

Preventing Cracks in Aluminum Alloy Die Castings Features and inspection methods: The surface of the casting has linear or irregular narrow and uneven patterns, which have a development trend under external forces. Cold cracking - the metal at the cracking point has not been oxidized. Hot cracking - the metal at the crack is oxidized. Cause of occurrence: 1. The iron content in the alloy is too high or the silicon content is too low. 2. The excessive content of harmful impurities in the alloy reduces its plasticity. 3. Aluminum silicon alloy: Aluminum silicon copper alloy contains zinc or has a high copper content; Aluminum magnesium alloy contains too much magnesium. 4. The mold temperature is too low. 5. There are significant changes in the wall thickness of castings, which hinder shrinkage. 6. Excessive mold retention time and high stress. 7. Uneven force distribution during ejection. Preventive measures: 1. Properly controlling the alloy composition, in some cases pure aluminum ing…