Amorphous alloy die cast and heat treatment process of the same

Abstract

A heat treatment process for an amorphous alloy die cast comprises: the amorphous alloy die cast is subjected to an aging treatment at a temperature of about 0.5-0.6 Tg, for a time of about 10 minutes to about 24 hours. The amorphous alloy die cast comprises Zr, and is represented by a formula of (Zr 1−x Ti x ) a (Cu 1−y Ni y ) b Al c M d , in which M is selected from the group consisting of: Be, Y, Sc, La, and combinations thereof, 38≦a≦65, 0≦x≦0.45, 0≦y≦0.75, 20≦b≦40, 0≦c≦15, 0≦d≦30, and the sum of a, b, c, and d in atomic percentages equals to 100.

1 . A heat treatment process for an amorphous alloy die cast comprising:
 subjecting the amorphous alloy die cast to an aging treatment
 at a temperature of about 0.5 Tg to about 0.6 Tg, wherein Tg is a glass transition temperature of the alloy, and 
 for a time period of about 10 minutes to about 24 hours. 
   
     
     
         2 . The heat treatment process of  claim 1 , wherein the temperature is about 0.53 Tg to about 0.57 Tg, and the time period is about 30 minutes to about 60 minutes. 
     
     
         3 . The heat treatment process of  claim 1 , wherein the amorphous alloy die cast is formed by a die casting process in a condition of a pressure of about 50 Pa to about 200 Pa and a die casting speed of about 3 m/s to about 5 m/s. 
     
     
         4 . The heat treatment process of  claim 1 , wherein the amorphous alloy die cast has a thickness of about 0.5 mm to about 2 mm. 
     
     
         5 . The heat treatment process of  claim 1 , wherein the amorphous alloy die cast has a thickness of about 1.0 mm to about 1.5 mm. 
     
     
         6 . The heat treatment process of  claim 1 , wherein the aging treatment is performed under a positive pressure of about 0.1 MPa to about 0.5 MPa. 
     
     
         7 . The heat treatment process of any one of  claims 1 ,  3 ,  4 , and  6 , wherein the amorphous alloy die cast
 comprises Zr, and   is represented by a formula of (Zr 1−x Ti x ) a (Cu 1−y Ni y ) b Al c M d , wherein
 M is selected from the group consisting of: Be, Y, Sc, La, and combinations 
   
       thereof,
   “x” is in the range of from 0 to 0.45 in atomic percentage,   “y” is in the range of from 0 to 0.75 in atomic percentage,   “a” is in the range of from 38 to 65,   “b” is in the range of from 20 to 40,   “c” is in the range of from 0 to 15,   “d” is in the range of from 0 to 30, and the sum of a, b, c, and d in atomic percentage equals to 100.   
 
     
     
         8 . An amorphous alloy die cast, wherein the amorphous alloy die cast
 comprises Zr and   is treated by the heat treatment process described in any one of  claims 1 ,  3 ,  4 , and  6 .   
     
     
         9 . The amorphous alloy die cast of  claim 8 , wherein the amorphous alloy die cast is represented by a formula of (Zr 1−x Ti x ) a (Cu 1−y Ni y ) b Al c M d , in which
 M is selected from the group consisting of: Be, Y, Sc, La, and combinations thereof,   “x” is in the range of from 0 to 0.45,   “y” is in the range of from 0 to 0.75,   “a” is in the range of from 38 to 65,   “b” is in the range of from 20 to 40,   “c” is in the range of from 0 to 15,   “d” is in the range of from 0 to 30, and   the sum of a, b, c, and d in atomic percentage equals to 100.   
     
     
         10 . The amorphous alloy die cast of  claim 9 , wherein the amorphous alloy die cast is represented by a formula of Zr 55 Al 15 Cu 25 Ni 5  or Zr 41 Ti 14 Cu 15 Ni 10 Be 20 . 
     
     
         11 . The amorphous alloy die cast of  claim 8 , wherein the amorphous alloy die cast has a thickness of about 0.5 mm to about 2 mm.