Iron-based amorphous/nanocrystalline alloy and preparation method therefor

Abstract

The present invention provides an iron-based amorphous/nanocrystalline alloy as shown in formula Fe(100-a-b-c-d-e)BaSibPcCdCue, wherein d+(b/c)=0.85-1.3, and a viscosity coefficient n is (3.0-8.0)*10−3 Pa/s. The present application further provides a preparation method for the iron-based amorphous/nanocrystalline alloy. According to the present application, the dynamic viscosity coefficient n is regulated by means of a change in the content of the elements in the alloy, such that the control range of viscosity of molten steel is ensured, the molten steel has higher purity, and the continuity of casting and the surface quality of a strip are guaranteed.

1 . An iron-based amorphou-nanocrystalline alloy as shown in formula (I),
   Fe (100-a-b-c-d-e) B a Si b P c C d Cu e   (I);
   wherein, a, b, c, d and e respectively represent atomic percent content of the corresponding components, 1≤a≤12, 0.2≤b≤6, 2≤c≤6, 0.5≤d≤4, 0.6≤e≤2, a+b+c+d+e=100; and d+(b/c)=0.85-1.3.   
     
     
         2 . The iron-based amorphou-nanocrystalline alloy according to  claim 1 , wherein, 5≤a≤12, 0.8≤b≤6, 2≤c≤5, 0.5≤d≤3, and 0.6≤e≤1.3. 
     
     
         3 . The iron-based amorphou-nanocrystalline alloy according to  claim 1 , wherein, 8≤a≤12, 0.8≤b≤1.5, 3≤c≤5, 0.7≤d≤1.2, and 0.6≤e≤1.3. 
     
     
         4 . The iron-based amorphou-nanocrystalline alloy according to  claim 1 , wherein atomic percent content of Fe≥83. 
     
     
         5 . The iron-based amorphou-nanocrystalline alloy according to  claim 1 , wherein impurity elements in the iron-based amorphou-nanocrystalline alloy are Al≤50 ppm, Mn≤100 ppm and Ti≤80 ppm. 
     
     
         6 . The iron-based amorphou-nanocrystalline alloy according to  claim 1 , wherein the iron-based amorphou-nanocrystalline alloy has a viscosity coefficient n of (3.0-8.0)*10 −3  Pa/s. 
     
     
         7 . The iron-based amorphou-nanocrystalline alloy according to  claim 1 , wherein d+(b/c)=0.86-1.2, and viscosity coefficient n is (4.1-6.9)*10 −3  Pa/s. 
     
     
         8 . The iron-based amorphou-nanocrystalline alloy according to  claim 1 , wherein the iron-based amorphou-nanocrystalline alloy has an N<100 and M<200; wherein N is the frequency of slag line occurrence, iron-based amorphou-nanocrystalline alloy strip has a width of is 80-122 mm, and the frequency of slag line occurrence within one continuous meter is N=m*L, m is the number of slag lines, and L is the length of the slag lines in mm; and M is the frequency of impurity in a unit area of 3 mm*3 mm, wherein M=n*h, wherein n is the number of impurity, and h is the height of impurity in μm. 
     
     
         9 . A method of preparing the iron-based amorphou-nanocrystalline alloy according to  claim 1 , which comprises steps of:
 providing raw materials according to composition ratio, melting and calming each raw material, and then performing single-roller rapid quenching.   
     
     
         10 . The preparation method according to  claim 9 , wherein the calming is performed for a time of 30-50 min.