Powder metallurgy wear and corrosion resistance alloy

Abstract

A powder metallurgy wear and corrosion resistance alloy includes chemical components by mass percent of: C: 2.36%-3.30%, W: 0.1%-1.0%, Mo: ≤1.8%, Cr: 12.6%-18.0%, V: 6.0%-12.5%, Nb: 0.5%-2.1%, Co: 0.1%-0.5%, Si: ≤1.0%, Mn: 0.2%-1.0%, N: 0.05%-0.35%, with balance iron and impurities; wherein a carbide component of the powder metallurgy wear and corrosion resistance alloy is an MX carbide and a M 7 C 3 carbide, wherein the MX carbide has a NaCl type face-centered cubic lattice structure; an M element of the MX carbide comprises V and Nb, and an X element of the MX carbide comprises C and N.

1 - 13 . (canceled) 
     
     
         14 . A powder metallurgy wear and corrosion resistance alloy, comprising chemical components by mass percent of: C: 2.36%-3.30%, W: 0.1%-1.0%, Mo: ≤1.8%, Cr: 12.6%-18.0%, V: 6.0%-12.5%, Nb: 0.5%-2.1%, Co: 0.1%-0.5%, Si: ≤1.0%, Mn: 0.2%-1.0%, N: 0.05%-0.35%, with balance iron and impurities; wherein a carbide component of the powder metallurgy wear and corrosion resistance alloy is an MX carbide and a M 7 C 3  carbide, wherein the MX carbide has a NaCl type face-centered cubic lattice structure; an M element of the MX carbide comprises V and Nb, and an X element comprises C and N. 
     
     
         15 . The powder metallurgy wear and corrosion resistance alloy, as recited in  claim 14 , wherein the impurities comprise O, wherein an O content is no more than 0.01%. 
     
     
         16 . The powder metallurgy wear and corrosion resistance alloy, as recited in  claim 14 , comprising the chemical components by mass percent of: C: 2.40%-3.18%, W: 0.1%-0.8%, Mo: ≤1.8%, Cr: 13.0%-18.0%, V: 6.2%-12.5%, Nb: 1.0%-2.0%, Co: 0.1%-0.4%, Si: ≤0.8%, Mn: 0.2%-0.8%, N: 0.05%-0.30%, O: ≤0.008%, with balance iron and impurities. 
     
     
         17 . The powder metallurgy wear and corrosion resistance alloy, as recited in  claim 15 , comprising the chemical components by mass percent of: C: 2.40%-3.18%, W: 0.1%-0.8%, Mo: ≤1.8%, Cr: 13.0%-18.0%, V: 6.2%-12.5%, Nb: 1.0%-2.0%, Co: 0.1%-0.4%, Si: ≤0.8%, Mn: 0.2%-0.8%, N: 0.05%-0.30%, O: ≤0.008%, with balance iron and impurities. 
     
     
         18 . The powder metallurgy wear and corrosion resistance alloy, as recited in  claim 14 , wherein the impurities comprise S, wherein a S content is no more than 0.1%. 
     
     
         19 . The powder metallurgy wear and corrosion resistance alloy, as recited in  claim 17 , wherein the impurities comprise S, wherein a S content is no more than 0.1%. 
     
     
         20 . The powder metallurgy wear and corrosion resistance alloy, as recited in  claim 14 , wherein the impurities comprise P, wherein a P content is no more than 0.03%. 
     
     
         21 . The powder metallurgy wear and corrosion resistance alloy, as recited in  claim 19 , wherein the impurities comprise P, wherein a P content is no more than 0.03%. 
     
     
         22 . The powder metallurgy wear and corrosion resistance alloy, as recited in  claim 14 , wherein a volume fraction of the MX carbide is 12%-20%. 
     
     
         23 . The powder metallurgy wear and corrosion resistance alloy, as recited in  claim 21 , wherein a volume fraction of the MX carbide is 12%-20%. 
     
     
         24 . The powder metallurgy wear and corrosion resistance alloy, as recited in  claim 14 , wherein a size of at least 80% of the MX carbide is no more than 1.3 μm judging from volume percentage. 
     
     
         25 . The powder metallurgy wear and corrosion resistance alloy, as recited in  claim 23 , wherein a size of at least 80% of the MX carbide is no more than 1.3 μm judging from volume percentage. 
     
     
         26 . The powder metallurgy wear and corrosion resistance alloy, as recited in  claim 25 , wherein a maximum size of the MX carbide is no more than 5 μm. 
     
     
         27 . The powder metallurgy wear and corrosion resistance alloy, as recited in  claim 14 , wherein the M 7 C 3  carbide is a Cr-enriched carbide. 
     
     
         28 . The powder metallurgy wear and corrosion resistance alloy, as recited in  claim 26 , wherein the M 7 C 3  carbide is a Cr-enriched carbide. 
     
     
         29 . The powder metallurgy wear and corrosion resistance alloy, as recited in  claim 14 , wherein a volume fraction of the M 7 C 3  carbide is 12%-19%. 
     
     
         30 . The powder metallurgy wear and corrosion resistance alloy, as recited in  claim 28 , wherein a volume fraction of the M 7 C 3  carbide is 12%-19%. 
     
     
         31 . The powder metallurgy wear and corrosion resistance alloy, as recited in  claim 30 , wherein a size of at least 80% of the M 7 C 3  carbide is no more than 5 μm judging from volume percentage. 
     
     
         32 . The powder metallurgy wear and corrosion resistance alloy, as recited in  claim 31 , wherein a maximum size of the MX carbide is no more than 10 μm. 
     
     
         33 . The powder metallurgy wear and corrosion resistance alloy, as recited in  claim 32 , wherein the M 7 C 3  carbide has a hexagonal lattice structure.