Iron-based metallic glass alloy powder

Abstract

The present invention provides an iron-based metallic glass alloy powder comprising: an iron-based metal element group mainly comprising Fe; a setnimetal element group comprising Si, B, P, and C; a small amount of at least one degree-of-supercooling improvement element group selected from the group consisting of Nb and Mo; and optionally a corrosion resistance modification component, wherein the total amount of the semimetal element group and the total amount of the corrosion resistance modification component are set within predetermined ranges, and the iron-based metallic glass alloy powder has a particle size of 30 μm or less.

1 . An iron-based metallic glass alloy powder, wherein the iron-based metallic glass alloy is represented by the following compositional formula:
   (Fe 1-s-t Co s Ni t ) 100-x-y [(Si a B b ) m (P c C d ) n ] x M y ,   the compositional ratios of the iron-based metal element group Fe, Co, and Ni are such that 19x≤22, 0≤y≤6.0, 0≤s≤0.35 0≤t≤0.35 and s+t≤0.35,   the compositional ratios of the semimetal element group Si, B, P, and C are such that   (0.5:1)≤(m:n)≤(6:1),   (2.5:7.5)≤(a:b)≤(5.5:4.5), and   (5.5:4.5)≤(c:d)≤(9.5:0.5),   the degree-of-supercooling improvement element group M is at least one selected from the group consisting of Nb and Mo,   the iron-based metallic glass alloy further comprises at least one selected from the group consisting of Cr and Zr as a corrosion resistance modification component,   the content ratio of the corrosion resistance modification component is 2.8 to 5.5% by weight based on the total mass of the alloy components, and   the iron-based metallic glass alloy powder has a particle size of 0.5 μm or more and less than 3 μm.   
     
     
         2 . An iron-based metallic glass alloy powder, wherein the iron-based metallic glass alloy is represented by the following compositional formula:
   (Fe 1-s-t Co s Ni t ) 100-x-y [(Si a B b ) m (P c C d ) n ] x M y ,   the compositional ratios of the iron-based metal element group Fe, Co, and Ni are such that 19≤x≤26, 0≤y≤6.0, 0≤s≤0.35, 0≤t≤0.35, and s+t≤0.35,   the compositional ratios of the semimetal element group Si, B, P, and C are such that   (0.5:1)≤(m:n)≤(6:1),   (2.5:7.5)≤(a:b)≤(5.5:4.5), and   (5.5:4.5)≤(c:d)≤(9.5:0.5),   the degree-of-supercooling improvement element group M is at least one selected from the group consisting of Nb and Mo,   the iron-based metallic glass alloy further comprises at least one selected from the group consisting of Cr and Zr as a corrosion resistance modification component,   the content ratio of the corrosion resistance modification component is 2.3 to 5.5% by weight based on the total mass of the alloy components, and   the iron-based metallic glass alloy powder has a particle size of 3 μm or more and less than 10 μm.   
     
     
         3 . An iron-based metallic glass alloy powder, wherein the iron-based metallic glass alloy is represented by the following compositional formula:
   (Fe 1-s-t Co s Ni t ) 100-x-y [(Si a B b ) m (P c C d ) n ] x M y ,   the compositional ratios of the iron-based metal element group Fe, Co, and Ni are such that 19≤x≤26, 0≤y≤6.0, 0≤s≤0.35, 0≤t≤0.35, and s+t≤0.35,   the compositional ratios of the semimetal element group Si, B, P, and C are such that   (0.5:1)≤(m:n)≤(6:1),   (2.5:7.5)≤(a:b)≤(5.5:4.5), and   (5.5:4.5)≤(c:d)≤(9.5:0.5),   the degree-of-supercooling improvement element group M is at least one selected from the group consisting of Nb and Mo, and   the iron-based metallic glass alloy powder has a particle size of 10 to 30 μm.   
     
     
         4 . An irons-based metallic glass alloy powder, wherein the iron-based metallic glass alloy is represented by the following compositional formula:
   (Fe 1-s-t Co s Ni t ) 100-x-y [(Si a B b ) m (P c C d ) n ] x M y ,   the compositional ratios of the iron-based metal element group Fe, Co, and Ni are such that 19≤x≤22, 0≤y≤6.0, 0≤s≤0,35, 0<t≤0.35, and s+t≤0.35,   the compositional ratios of the semimetal element group Si, B, P. and C are such that   (0.5:1)≤(m:n)≤(6.1:1),   (2.5:7.5)≤(a:b)≤(5.6:4.4), and   (4.2:5.8)≤(c:d)≤(9.5:0.5),   the degree-of-supercooling improvement element group M is at least one selected from   the group consisting of Nb and Mo,   the iron-based metallic glass alloy further comprises at least one selected from the group   consisting of Cr and Zr as a corrosion resistance modification component,   the content ratio of the corrosion resistance modification component is 2.,8 to 5.5% by weight based on the total mass of the alloy components, and   the iron-based metallic glass alloy powder has a particle size of 0.5 μm or more and less than 3 μm.   
     
     
         5 . An iron-based metallic glass alloy powder, wherein the iron-based metallic glass alloy is represented by the following compositional formula:
   (Fe 1-s-t Co s Ni t ) 100-x-y [(Si a B b ) m (P c C d ) n ] x M y ,   the compositional ratios of the iron-based metal element group Fe, Co, and Ni are such that 19≤x≤26, 0≤y≤6.0, 0≤s≤0.35, 0≤t≤0.35, and s+t≤0.35,   the compositional ratios of the semimetal element group Si, B, P, and C are such that   (0.5:1)≤(m:n)≤(6.1:1),   (2.5:7.5)≤(a:b)≤(5.6:4.4), and   (4.2:5.8)≤(c:d)≤(9.5:0.5),   the degree-of-supercooling improvement element group M is at least one selected from the group consisting of Nb and Mo,   the iron-based metallic glass alloy further comprises at least one selected from the group consisting of Cr and Zr as a corrosion resistance modification component,   the content ratio of the corrosion resistance modification component is 2.3 to 5.5% by weight based on the total mass of the alloy components, and   the iron-based metallic glass alloy powder has a particle size of 3 μm or more and less than 10 μm.   
     
     
         6 . An iron-based metallic glass alloy powder, wherein the iron-based metallic glass alloy is represented by the following compositional formula:
   (Fe 1-s-t Co s Ni t ) 100-x-y [(Si a B b ) m (P c C d ) n ] x M y ,   the compositional ratios of the iron-based metal element group Fe, Co, and Ni are such that 19≤x≤26, 0≤y≤6.0, 0≤s≤0.35, 0≤t≤0.35, and s+t≤0.35,   the compositional ratios of the semimetal element group Si, B, P, and C are such that   (0.5:1)≤(m:n)≤(6.1:1),   (2.5:7.5)≤(a:b)≤(5.6:24.4), and   (4.2:5.8)≤(c:d)≤(9.5:0.5),   the degree-of-supercooling improvement element group M is at least one selected from the group consisting of Nb and Mo, and   the iron-based metallic glass alloy powder has a particle size of 10 to 30 μm.   
     
     
         7 . The iron-based metallic glass alloy powder according to  claim 3 , wherein the iron-based metallic glass alloy further comprises at least one selected from the group consisting of Cr and Zr as a corrosion resistance modification component in an amount of greater than 0% by weight and not higher than 5.5% by weight based on the total mass of the alloy components. 
     
     
         8 . The iron-based metallic glass alloy powder according to  claim 1 , wherein the corrosion resistance modification component is Cr. 
     
     
         9 . A formed article produced by using the iron-based metallic glass alloy powder according to  claim 1 . 
     
     
         10 . The iron-based metallic glass alloy powder according to  claim 6 , wherein the iron-based metallic glass alloy further comprises at least one selected from the group consisting of Cr and Zr as a corrosion resistance modification component in an amount of greater than 0% by weight and not higher than 5.5% by weight based on the total mass of the alloy components. 
     
     
         11 . The iron-based metallic glass alloy powder according to  claim 2 , wherein the corrosion resistance modification component is Cr. 
     
     
         12 . The iron-based metallic glass alloy powder according to  claim 4 , wherein the corrosion resistance modification component is Cr. 
     
     
         13 . The iron-based metallic glass alloy powder according to  claim 5 , wherein the corrosion resistance modification component is Cr. 
     
     
         14 . The iron-based metallic glass alloy powder according to  claim 7 , wherein the corrosion resistance modification component is Cr. 
     
     
         15 . A formed article produced by using the iron-based metallic glass alloy powder according to  claim 2 . 
     
     
         16 . A formed article produced by using the iron-based metallic glass alloy powder according to  claim 3 . 
     
     
         17 . A formed article produced by using the iron-based metallic glass alloy powder according to  claim 4 . 
     
     
         18 . A formed article produced by using the iron-based metallic glass alloy powder according to  claim 5 . 
     
     
         19 . A formed article produced by using the iron-based metallic glass alloy powder according to  claim 6 . 
     
     
         20 . A formed article produced by using the iron-based metallic glass alloy powder according to  claim 7 . 
     
     
         21 . A formed article produced by using the iron-based metallic glass alloy powder according to  claim 8 .