초록 ▼

A method of producing a hard metallic material by forming a mixture containing at least 55% iron and at least one of boron, carbon, silicon and phosphorus. The mixture is formed into an alloy and cooled to form a metallic material having a hardness of greater than about 9.2 GPa. The invention includ

A method of producing a hard metallic material by forming a mixture containing at least 55% iron and at least one of boron, carbon, silicon and phosphorus. The mixture is formed into an alloy and cooled to form a metallic material having a hardness of greater than about 9.2 GPa. The invention includes a method of forming a wire by combining a metal strip and a powder. The metal strip and the powder are rolled to form a wire containing at least 55% iron and from two to seven additional elements including at least one of C, Si and B. The invention also includes a method of forming a hardened surface on a substrate by processing a solid mass to form a powder, applying the powder to a surface to form a layer containing metallic glass, and converting the glass to a crystalline material having a nanocrystalline grain size.

대표청구항 ▼

1. An Fe-based alloy hardfacing material having a composition selected from the group consisting of (Fe0.8Cr0.2)79B17W2C2, (Fe0.8Cr0.2)73Mo2W2B16C4Si1Mn2, (Fe0.8Cr0.2)75Mo2B17C5Si1, Fe63Cr8Mo2B17C5Si1Al4, (Fe0.8Cr0.2)75W2B17C5Si1, (Fe0.8Cr0.2)73Mo2W2B17C5Si1, (Fe0.8Cr0.2)72Mo2W7B17C5Si1Gd1, (Fe0.8Cr

1. An Fe-based alloy hardfacing material having a composition selected from the group consisting of (Fe0.8Cr0.2)79B17W2C2, (Fe0.8Cr0.2)73Mo2W2B16C4Si1Mn2, (Fe0.8Cr0.2)75Mo2B17C5Si1, Fe63Cr8Mo2B17C5Si1Al4, (Fe0.8Cr0.2)75W2B17C5Si1, (Fe0.8Cr0.2)73Mo2W2B17C5Si1, (Fe0.8Cr0.2)72Mo2W7B17C5Si1Gd1, (Fe0.8Cr0.2)71Mo2W2B17C5Si1Gd2, and (Fe0.8Cr0.2)74Mo2W2B17C4Si1, the Fe-based alloy hardfacing material having a microstructure comprising devitrified nanocrystalline Fe-based alloy grains having a grain size in the range of from about 75 nanometers to about 125 nanometers, the microstructure further comprising second phase precipitates, the Fe-based alloy hardfacing material having a hardness of at least about 9.2 GPa and a tensile elongation of from about 5% to about 180%. 2. The Fe-based alloy hardfacing material of claim 1, wherein the hardfacing material has a porosity of less than or equal to about 5%. 3. The Fe-based alloy hardfacing material of claim 1, wherein the hardfacing material has a porosity of less than or equal to about 1%. 4. An Fe-based alloy hardfacing material having a composition selected from the group consisting of (Fe0.8Cr0.2)75Mo2B17C5Si1, Fe63Cr8Mo2B17C5Si1Al4, (Fe0.8Cr0.2)75W2B17C5Si1, (Fe0.8Cr0.2)73Mo2W2B17C5Si1, (Fe0.8Cr0.2)72Mo2W2B17C5Si1Gd1, and (Fe0.8Cr0.2)71Mo2W2B17C5Si1Gd2, the Fe-based alloy hardfacing material further having a microstructure comprising at least some amorphous glass structure, at least some crystalline structure comprising nanocrystalline grains of Fe-based alloy having a grain size in the range of from about 75 nanometers to about 125 nanometers, and second phase precipitates at grain boundaries, the Fe-based alloy hardfacing material having a hardness of at least about 9.2 GPa and a tensile elongation of from about 0.5% to about 60%. 5. An alloy hardfacing material having a composition selected from the group consisting of (Fe0.8Cr0.2)81B17W2, (Fe0.8Mo0.2)83B17, Fe83B17, (Fe0.8Cr0.2)79B17W2C2, (Fe0.8Cr0.2)75Mo2B17C5Si1, (Fe0.8Cr0.2)73Mo2W2B16C4Si1Mn2, Fe63Cr8Mo2B17C5Si1Al4, (Fe0.8Cr0.2)75W2B17C5Si1, (Fe0.8Cr0.2)73Mo2W2B17C5Si1, (Fe0.8Cr0.2)72Mo2W2B17C5Si1Gd1, (Fe0.8Cr0.2)71Mo2W2B17C5Si1Gd2, and (Fe0.8Cr0.2)74Mo2W2B17C4Si1, the hardfacing material having at least some structure comprising nanocrystalline grains of Fe-based alloy material having a grain size in the range of from about 75 nanometers to about 125 nanometers and second phase precipitates at grain boundaries, the alloy hardfacing material having a hardness of at least about 9.2 GPa and a tensile elongation of from about 5% to about 60%.