High strength, oxidation and wear resistant titanium-silicon base alloys and the use thereof

Abstract

The present invention relates to high strength, oxidation and wear resistant titanium-silicon base alloy containing: 2.5-12 wt % Si 0-5 wt % Al 0-0.5% B 0-2% Cr 0-1 wt % rare earth metals and/or scandium balance Ti with unavoidable impurities.

1 . High strength, oxidation and wear resistant titanium-silicon base alloy characterized in that the alloy contains: 
 2.5-12 wt %Si    0-5 wt % Al    0-0.5% B    0-2% Cr    0-1 wt % rare earth metals and/or scandium    balance Ti with unavoidable impurities.    
   
   
       2 . Alloy according to  claim 1 , characterized in that the alloy contains 0.3 to 3 wt % Al.  
   
   
       3 . Alloy according to  claim 1 , characterized in that the alloy contains 0.001-0.15 wt % rare earth metal and/or scandium.  
   
   
       4 . Alloy according to  claim 1 , characterized in that the alloy contains 0.5 to 2 wt % Cr.  
   
   
       5 . Alloy according to  claim 1 , characterized in that the alloy contains 0.01 to 0.03 wt % B.  
   
   
       6 . Alloy according to  claim 1 , with near eutectic composition and related microstructure, characterized in that the alloy contains 
 6-9 wt % Si    1.2-2.5 wt % Al    0.001-0.15 wt % rare earth metals    with yield strength of more than 700 Mpa at room temperature, fracture toughness of more than K IC =15 MPa √{square root over (m)}, and improved wear and oxidation resistance.    
   
   
       7 . Alloy according to  claim 1 , characterized in that the alloy contains 1.1 to 3 wt. % Al.