Composition, processing and devices including magnetic alloy
AssigneeBell Telephone Laboratories, Incorporated
InventorsGilbert Yukyu Chin, John Travis Plewes, Bud Caesar Wonsiewicz
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Abstract
Alloy compositions based on ternary alloys of the chromium-cobalt-iron system modified by addition of zirconium molybdenum, niobium, vanadium, titanium, and/or aluminum, are found to manifest improved formability. Exemplary compositions are magnetic and evidence coercivities of 350-550 Oe., remanent magnetizations of from 10,000 - 7,500 Gauss, and maximum energy products in excess of one million. Improvement in formability may take the form of room temperature stamping, sometimes in air, to final configurations including curvatures of radius equal to thickness. Novel compositions particularly desirable from such standpoint necessarily contain zirconium together with aluminum, niobium, and/or titanium.
Claims22
Method for producing a magnetic element which comprises mechanically working stock material comprising the ternary composition chromium 25-30 parts by weight, cobalt 10-20 parts by weight, remainder iron to total 100 parts by weight, the said composition additionally comprising at least 0.1 weight percent of at least one element selected from the group consisting of zirconium, molybdenum, vanadium, niobium, titanium, and aluminum which comprises the steps of (a) hot rolling a formed ingot, (b) rapidly quenching the ingot, (c) subjecting the resultant quenched ingot to room temperature forming so as to result in deformation of the stock material, such deformation including bending to produce a change in direction of at least 30.degree. with such bending having a radius of curvature which attains a magnitude at least as small as a value which is inversely proportional to the extent of change in direction with such magnitude corresponding with a 30.degree. change in direction being no greater than equal to the thickness of the said stock material and the radius corresponding with a 90.degree. change in direction being no greater than four times the thickness of the said stock material and, (d) magnetically aging the formed product to develop desired magnetic characteristics.
Dependencies are inferred from the claim text.