US2003037846A1PendingUtilityA1

Creep-resistant magnesium alloy

34
Priority: Mar 14, 2001Filed: Feb 21, 2002Published: Feb 27, 2003
Est. expiryMar 14, 2021(expired)· nominal 20-yr term from priority
Inventors:Hiroyuki OmuraYouji Yamada
C22C 23/02
34
PatentIndex Score
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Claims

Abstract

A creep-resistant magnesium alloy having creep resistance superior to AE42 alloy and having relatively high corrosion resistance. The magnesium alloy has superior castability without any generation of open cracks and is less expensive than AE42 alloy for production. The creep-resistant magnesium alloy is made from 1.5 to 4.0 mass % of Al, 0.5 to 1.8 mass % of Si, 0.05 to 0.6 mass % of RE, 0.005 to 1.5 mass % of Sr or Sb, and the reminder made from Mg and unavoidable impurities. Creep resistance is enhanced when 0.3 to 1.5 mass % of Ca is included. Further, corrosion resistance is enhanced when 0.1 to 0.4 mass % of Mn is included.

Claims

exact text as granted — not AI-modified
What is claimed is:  
     
         1 . A creep-resistant magnesium alloy containing 1.5 to 4.0 percent by mass of Al, 0.5 to 1.8 percent by mass of Si, 0.05 to 0.6 percent by mass of RE, 0.005 to 1.5 percent by mass of Sr, and the balance made from Mg and unavoidable impurities.  
     
     
         2 . The creep-resistant magnesium alloy as claimed in  claim 1 , further containing 0.3 to 1.5 percent by mass of Ca.  
     
     
         3 . The creep-resistant magnesium alloy as claimed in  claim 2 , further containing 0.1 to 0.4 percent by mass of Mn.  
     
     
         4 . The creep-resistant magnesium alloy as claimed in  claim 1 , further containing 0.1 to 0.4 percent by mass of Mn.  
     
     
         5 . A creep-resistant magnesium alloy containing 1.5 to 4.0 percent by mass of Al, 0.5 to 1.8 percent by mass of Si, 0.05 to 0.6 percent by mass of RE, 0.005 to 1.5 percent by mass of Sb, and the balance made from Mg and unavoidable impurities.  
     
     
         6 . The creep-resistant magnesium alloy as claimed in  claim 5 , further containing 0.3 to 1.5 percent by mass of Ca.  
     
     
         7 . The creep-resistant magnesium alloy as claimed in  claim 6 , further containing 0.1 to 0.4 percent by mass of Mn.  
     
     
         8 . The creep-resistant magnesium alloy as claimed in  claim 5 , further containing 0.1 to 0.4 percent by mass of Mn.

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