Patent ID: 7449074

Claim:
A process for forming a nano-crystalline metal sheet comprising: supplying a liquid metallic glass forming alloy, said alloy containing 1.6-2.0 atomic percent W, 48.6-64.8 atomic percent Fe, 15.8 to 19.0 atomic percent Cr, 0 to 2.5 atomic percent Mo, 14.9 to 17.0 atomic percent B, 0-6.7 atomic percent C, 0 to 2.5 atomic percent Si and 0 to 2.0 atomic percent Mn wherein said alloy will form into nano-crystalline metallic material; providing two casting rolls, said rolls provided having a gap therebetween; introducing said liquid metallic glass forming alloy to said casting rolls proximate said gap; forming a sheet by rotating said casting rolls; and cooling said liquid metallic glass forming alloy at a rate on the order of 10 4 K/s to produce a nano-crystalline microstructure, having a melting point from about 1134° C. to 1225° C.