Expertise, Process Controls and Experience are Key
Utilizing aluminum and aluminum alloys in the investment casting process requires significant expertise, process controls and experience. Even when melting and holding conditions are optimum, molten aluminum is prone to various types of degradation. Hydrogen absorption increases over time at melting temperature, which compromises the alloy. Oxidation also occurs and increases with time. Unwanted complex oxides can be created. In addition, transient element losses can take place, affecting levels of magnesium, strontium, calcium and sodium. The integrity of aluminum casting can be compromised by these factors. Ensure that your casting partner has necessary capabilities to manage these issues