초록 ▼

New iron base alloys containing aluminum and boron are disclosed. The alloys are subjected to a rapid solidification processing (RSP) technique which produces cooling rates between ＿105 to 107°C./sec. The as-quenched ribbon or powder, etc consists primarily of a metastable crystalline solid solution

New iron base alloys containing aluminum and boron are disclosed. The alloys are subjected to a rapid solidification processing (RSP) technique which produces cooling rates between ＿105 to 107°C./sec. The as-quenched ribbon or powder, etc consists primarily of a metastable crystalline solid solution phase. The metastable crystalline phases are subjected to suitable heat treatments so as to produce a transformation to a stable multiphase microstructure which includes borides. The heat treated alloy exhibits superior mechanical properties with good corrosion and oxidation resistance.

대표청구항 ▼

A metastable crystalline solid solution alloy of composition FeaAlbMd1SieBf where M1 is at least one element selected from the group consisting of Mo,W,Nb,Ta, and V and combinations thereof, wherein the subscripts represent atom percent having the values a=40-65, b=20-40, d=0-10, e=0-5, and f=5-17 w

A metastable crystalline solid solution alloy of composition FeaAlbMd1SieBf where M1 is at least one element selected from the group consisting of Mo,W,Nb,Ta, and V and combinations thereof, wherein the subscripts represent atom percent having the values a=40-65, b=20-40, d=0-10, e=0-5, and f=5-17 with the provisos that the sum of e+f does not exceed 17 and is not less than 7 and the sum of a+b+d+e+f is 100, wherein the said alloy is being prepared by the method comprising the following steps: a. forming a melt of said alloy b. depositing said melt against a rapidly moving quench surface adapted to quench said melt at a rate in the range of approximately 105 to 107°C./second and form thereby a rapidly solidified brittle strip and, c. comminuting said strip into powders.