Aluminum Alloy Refiner Material and Preparation Method Thereof

Abstract

The present invention provides an aluminum alloy refiner, which is characterized by being an amorphous alloy comprising 40 to 60 parts of Zr, 25 to 45 parts of Cu, 1 to 15 parts of Al, 1 to 10 parts of Pd and 1 to 10 parts of Nb in terms of mass fraction. The refiner provided by the present invention can be used to favorably refine crystal grains as well as improve the mechanical property of the aluminum alloy to a certain extent. Moreover, the intermediate alloy improves the strength and plasticity of the alloy, and a refined A356 aluminum alloy is very suitable for the manufacturing of automobile wheels.

1 . An aluminum alloy refiner, comprising: an amorphous alloy comprising 40 to 60 parts of Zr, 25 to 45 parts of Cu, 1 to 15 parts of Al, 1 to 10 parts of Pd and 1 to 10 parts of Nb in terms of mass fraction. 
     
     
         2 . The aluminum alloy refiner according to  claim 1 , wherein the aluminum alloy refiner is one of the following:
 the amorphous alloy comprising 50 parts of Zr, 35 parts of Cu, 7 parts of Al, 5 parts of Pd and 3 parts of Nb in terms of mass fraction;   the amorphous alloy comprising 40 parts of Zr, 45 parts of Cu, 1 part of Al, 10 parts of Pd and 1 part of Nb in terms of mass fraction;   the amorphous alloy comprising 60 parts of Zr, 25 parts of Cu, 15 parts of Al, 1 part of Pd and 10 parts of Nb in terms of mass fraction;   the amorphous alloy comprising 52 parts of Zr, 29 parts of Cu, 7 parts of Al, 7 parts of Pd and 3 parts of Nb in terms of mass fraction; and   the amorphous alloy comprising 57 parts of Zr, 41 parts of Cu, 12 parts of Al, 5 parts of Pd and 1 part of Nb in terms of mass fraction.   
     
     
         3 . The aluminum alloy refiner according to  claim 1 , wherein the aluminum alloy refiner is prepared through rapid cooling. 
     
     
         4 . The aluminum alloy refiner according to  claim 3 , wherein the rapid cooling is to melt Zr, Cu, Al, Pd and Nb at the temperature of 900 to 1000 degrees and prepare the aluminum alloy refiner by a single-roll melt spinner. 
     
     
         5 . An aluminum alloy refiner, prepared with a method as follows:
 (1) mixing pure metals of Zr, Cu, Al, Pd and Nb according to a certain proportion, pre-vacuumizing a vacuum electric arc furnace to be below 10 −3 Pa, charging an argon gas for smelting, and repeatedly smelting 5 times to prepare a master alloy with even components; and   (2) breaking the master alloy from step (1) into small lumps, placing the small lumps into a quartz tube, pre-vacuumizing a single-roll melt spinner to be below 10 −3 Pa, charging the argon gas to melt the master alloy in the quartz tube through induction heating, with the temperature of molten alloy of 900 to 1000 degrees, regulating the rotation speed of a copper roll to be 3000 to 4000 r/min, and spraying the molten alloy out to the surface of the copper roll by using the argon gas, thereby preparing an amorphous alloy ribbon.   
     
     
         6 . The aluminum alloy refiner according to  claim 5 , wherein the partial pressure of the argon gas in the step (1) is 0.02 to 0.05 Mpa. 
     
     
         7 . The aluminum alloy refiner according to  claim 5 , wherein the partial pressure of the argon gas in the step (2) is 0.05 to 0.1 Mpa. 
     
     
         8 . A method for preparing the Zr-Cu-Al-Pd-Nb amorphous alloy according to  claim 1 , comprising the following steps:
 (1) mixing pure metals of Zr, Cu, Al, Pd and Nb according to a certain proportion, pre-vacuumizing a vacuum electric arc furnace to be below 10 −3 Pa, charging an argon gas for smelting, and repeatedly smelting 5 times to prepare a master alloy with even components; and   (2) breaking the master alloy from the step (1) into small lumps, placing the small lumps into a quartz tube, pre-vacuumizing a single-roll melt spinner to be below 10 −3 Pa, charging the argon gas to melt the master alloy in the quartz tube through induction heating, with the temperature of molten alloy of 900 to 1000 degrees, regulating the rotation speed of a copper roll to be 3000 to 4000 r/min, and spraying the molten alloy out to the surface of the copper roll by using the argon gas, thereby preparing an amorphous alloy ribbon.   
     
     
         9 . The method according to  claim 8 , wherein the partial pressure of the argon gas in the step (1) is 0.02 to 0.05 Mpa. 
     
     
         10 . The method according to  claim 8 , wherein the partial pressure of the argon gas in the step (2) is 0.05 to 0.1 Mpa.