Chilled alloy and magnetic powder

The material alloy manufacture involves feeding the melt of iron-based rare earth material alloy onto a guide having a guide surface which defines an angle of 1-80[deg] with respect to horizontal plane so as to move the melt onto a region where the melt is contacted with the chill roller, and rapidly cooling the melt in the chill roller to make a rapidly solidified alloy comprising iron boride phase. The material alloy manufacture involves feeding the melt of iron-based rare earth material alloy onto the guide having a guide surface which defines an angle of 1-80[deg] with respect to horizontal plane so as to move the melt onto a region where the melt is contacted with the chill roller, and rapidly cooling the melt in the chill roller to make a rapidly solidified alloy comprising iron boride (R 2Fe 14B) phase. Iron-based material alloy has the composition: (Fe 1-mT m) 100-x-y-z-n(B 1-pCp) xR yTi zM n T is cobalt and/or nickel; R is yttrium and/or rare earth elements; M is aluminum, silicon, vanadium, chromium, manganese, copper, zinc, gallium, zirconium, niobium, molybdenum, silver, hafnium, tantalum, tungsten, platinum, gold, and/or lead; and the mole fraction x, y, z, m, n and p satisfy the relations: 10 atom% less than x=25 atom%, 6 atom% =y less than 10 atom%, 0.5 atom% =z=12 atom%, 0=m=0.5, 0 atom%=n=10 atom% and 0=p=0.25. Independent claims are included for the following: (1) production of iron-based permanent magnet; (2) production of bonded magnet; (3) rapidly solidifying alloy; and (4) magnetic powder having the alloy composition.