US2004103964A1PendingUtilityA1

Process for thermally treating light alloy casting

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Priority: Sep 9, 2002Filed: Aug 27, 2003Published: Jun 3, 2004
Est. expirySep 9, 2022(expired)· nominal 20-yr term from priority
Inventors:Takeyoshi NakamuraKatsuhiro Shibata
C22F 1/04C22F 1/043
45
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Claims

Abstract

A thermal treating process includes a step of heating a light alloy casting up to a solid solution range and maintaining it at such heating temperature T, and a step of quenching the light alloy casting through a cooling medium while pressurizing it. Thus, increase in porosity of the light alloy casting can be suppressed and generation of blisters on a surface of the light alloy casting can be prevented, thereby enhancing the toughness of the light alloy casting.

Claims

exact text as granted — not AI-modified
What is claimed is:  
     
         1 . A process for thermally treating a light alloy casting, comprising a step of: heating a light alloy casting up to a solid solution range and maintaining it at such heating temperature T; and a step of quenching the light alloy casting through a cooling medium while pressurizing it.  
     
     
         2 . A process for thermally treating a light alloy casting according to  claim 1 , wherein the heating temperature T is set at T>T S , wherein T S  represents a solidus-line temperature for a light alloy forming the light alloy casting.

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