Application of novel heat treatments for aluminium high pressure die castings to industrially produced components (original) (raw)

International Heat Treatment and Surface Engineering, 2009

Abstract

AbstractHigh pressure die casting (HPDC) is widely used as a cost effective way to mass produce metal components that are required to have close dimensional tolerances and smooth surface finishes, accounting for ∼50% of the aluminium castings produced worldwide. These components are not considered to be heat treatable by conventional means because the high temperatures involved with solution treatment cause surface blistering and dimensional instability. A new heat treatment procedure involving a truncated solution treatment at lower than conventional temperatures alleviates this problem and can significantly improve mechanical properties, in many cases, doubling the 0·2% proof strength after artificial (T6) aging. This may enable current HPDC parts to be redesigned to use less metal while still achieving the required performance. The cost of heat treatment can be easily offset by the reduction in metal content and productivity improvements which result in an overall lower cost of the part. The new proces...

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