Iron-based metallic glass alloy powder and use thereof in coating

Abstract

The invention provides an iron-based metallic glass alloy powder including: Fe as the main component; a metalloid element group including Si, B, and C; a small amount of Mo to improve the degree-of-supercooling; and the addition of Cr and Ni to increase corrosion resistance, where the total amount of the metalloid element group, the amount of the degree-of-supercooling improvement element and the total amount of the elements to increase corrosion resistance are set within predetermined ranges.

What is claimed is: 
     
         1 . An iron-based metallic glass alloy powder, represented by the following constituents:
 Fe (100-a-b-c-d) Cr a Ni b Mo c (B e C f Si g ) d ,   wherein 18≤a≤24; 10≤b≤14; 6≤c≤8; 20≤d≤28; 10≤e≤12; 6≤f≤10; 4≤g≤6.   
     
     
         2 . The iron-based metallic glass alloy powder of  claim 1 , being produced by a gas atomization process or a water atomization process. 
     
     
         3 . The iron-based metallic glass alloy powder of  claim 2 , having a particle size ranging from 5 μm to 300 μm. 
     
     
         4 . The iron-based metallic glass alloy powder of  claim 2 , represented by the following constituents:
 Fe 26 Cr 24 Ni 14 Mo 8 B 12 C 10 Si 6 .   
     
     
         5 . The iron-based metallic glass alloy powder of  claim 2 , represented by the following constituents:
 Fe 46 Cr 18 Ni 10 Mo 6 B 10 C 6 Si 4 .   
     
     
         6 . The iron-based metallic glass alloy powder of  claim 2 , having a hardness equal to or greater than Hv 1200. 
     
     
         7 . A coating being formed of an iron-based metallic glass alloy powder, the iron-based metallic glass alloy powder being represented by the following constituents comprising:
 Fe (100-a-b-c-d) Cr a Ni b Mo c (B e C f Si g ) d ,   wherein 18≤a≤24; 10≤b≤14; 6≤c≤8; 20≤d≤28; 10≤e≤12; 6≤f≤10; 4≤g≤6.   
     
     
         8 . The coating of  claim 7 , being formed by a high velocity flame spray process. 
     
     
         9 . The coating of  claim 8 , having a hardness equal to or greater than Hv 1100.