Abstract: A method of cleaning a metal surface includes covering the portion of the metal surface with a cleaning tape. The cleaning tape is chromium in combination with a fluoride ion source bound together by fibrillated polytetrafluoroethylene. This is applied to the portion of the area to be cleaned and is subject to heat treatment at about 1800.degree. F. and a reducing atmosphere of preferably hydrogen. This effectively cleans only the area covered by the tape. Further, the tape and binder format acts to force fluoride ions into the cracks on the surface providing a significantly improved cleaning operation.

Abstract: There is disclosed a R--Fe--B or R--Fe--Co--B alloy permanent magnet powder which may contain Ga, Zr or Hf, or may further contain Al, Si or V. Each individual particle of the powder includes a structure of recrystallized grains containing a R.sub.2 Fe.sub.14 B or R.sub.2 (Fe,Co).sub.14 B intermetallic compound phase. The intermetallic compound phase has recrystallized grains of a tetragonal crystal structure having an average crystal grain size of 0.05 to 20 .mu.m. At least 50% by volume of the recrystallized grains of the aggregated structure are formed so that a ratio of the greatest dimension to the smallest dimension is less than 2 for each recrystallized grain. In order to manufacture the magnet powder, regenerative material and alloy material are prepared and their temperature is elevated in a hydrogen atmosphere. Then, the alloy material and the regenerative material are held in the same atmosphere at a temperature or 750.degree. C. to 950.degree. C., and then held in a vacuum at 750.degree. C.

Abstract: A method is disclosed for producing a rapidly solidified, fine grained, magnetically anisotropic powder of the RE-Fe-B type. The rapidly solidified material is optimally quenched or slightly overquenched and is subjected to a hydrogen absorption-hydrogen desorption process that produces a fine grained material containing the essential magnetic phase RE.sub.2 TM.sub.14 B and an intergranular phase and is magnetically anisotropic.

Abstract: A laminated magnetic core is characterized in that core-forming thin sheets each having a surface roughness such that the maximum height Rmax is at least 1 .mu.m are laminated together with a sheet-to-sheet distance of 2 to 10 .mu.m, desirably 3 to 6 .mu.m and that at least a part of protruded portions of the opposite roughed surfaces is diffusion-bonded to each other at the interface between adjacent thin sheets. The laminated magnetic core may have innumberable voids present at the diffusion-bonded interface between the adjacent thin sheets. This invention further provides a method of manufacturing a laminated magnetic core comprising the steps of providing a plurality of core-forming thin sheets each having a surface roughness such that the maximum height Rmax is at least 1 .mu.m; laminating and bonding said core-forming thin sheets one upon another through an organic adhesive, desirably at a sheet-to-sheet distance of 2 to 10 .mu.

Abstract: The present invention relates to a novel heat treatment process, and the alloy products produced thereby. The heat treatment process includes heating an alloy at a temperature and for a time sufficient to cause crystallization, cooling the alloy at a rate greater than about 10.degree. C. per minute, preferably greater than about 50.degree. C. per minute, and most preferably greater than about 100.degree. C. per minute. Alloys of many compositions and having either amorphous, surface crystallized or partially bulk crystallized structure may be beneficially treated. Alloy strips and cores heat treated according to the present invention display B-H loops which display a discontinuous change in slope at near zero field conditions. Alloy strips which have been heat treated according to the present invention display greatly increased resonant output voltages and are particularly useful as resonant markers in article surveillance systems.

Abstract: A means is provided for improving the magnetic permeability of a magnetic circuit within a variable reluctance sensor having off-set, permanent magnets by appropriately annealing the magnetic flux member. The annealing process includes heating the machined magnetic flux member in a vacuum to a temperature and for a duration sufficient to austenitize the magnetic steel so that full carbide solution is obtained, for example about 1300.degree. F. to about 1550.degree. F. for a duration of about 15 to 30 minutes. The magnetic flux member is then appropriately cooled in the vacuum so as to prevent the formation of martensite. The magnetic circuit, incorporating the annealed magnetic flux member, exhibited improved magnetic permeability, and the sensor signal was increased by as much as about 60 percent during operation.

Abstract: The invention relates to a method of obtaining friable and relatively inert TR Fe B type magnetic materials in divided form which lead to magnets having improved corrosion resistance. This method involves treating the material in an atmosphere containing (or capable of containing) hydrogen under the following conditions of absolute pressure (P) and of temperature (T.degree. C.): if P.ltoreq.Pa, 250<T<550; and if P>Pa, 250+100 log (P/Pa)<T<250+100 log (P/Pa) log base 10, Pa being atmospheric pressure. The invention is used for obtaining sintered TR Fe B magnets having improved corrosion resistance.

Abstract: A soft magnetic alloy film has a composition formula expressed by Fex Mz Cw. M is at least one metallic element selected from a group consisting of Ti, Zr, Hf, Nb, Ta, Mo or W, or a mixture of these metallic elements. The composition ratio of x, z and w satisfies the relation expressed by 50 atomic % .ltoreq.x.ltoreq.96 atomic %, 2 atomic % .ltoreq.z.ltoreq.30 atomic %, 0.5 atomic % .ltoreq.w.ltoreq.25 atomic %, and x+z+w=100. The metallic structure of the soft magnetic alloy film basically consists of crystal grains having an average grain size of 0.08 .mu.m or below. The metallic structure contains the crystal phase of carbide of the element M.

Abstract: A method for manufacturing a device for contactless and digital measurement of a linear or angular condition of a first piece with respect to a second piece. A series of ferromagnetic encoding marks are provided onto a non-magnetic substrate of one of the pieces. The encoding marks are produced by a strongly local heating of the surface of a non-magnetic substrate of an austenitic steel stabilized by a metalloid in interstitial solution. Displacement, speed and acceleration of a linear or angular kind of one piece with respect to a second piece can thereby be measured with great accuracy.

Abstract: A method of producing grain oriented silicon steel sheets each having a low watt loss, at an inexpensive cost and a high operational efficiency, wherein surfaces of each silicon steel sheet are given a mirror surface is disclosed. After completion of a finish annealing, forsterite films on the surface of each grain oriented silicon steel sheet are removed therefrom, and thereafter, the silicon steel sheet is annealed within the temperature range of 1000.degree. C. or higher in an atmosphere composed of a mixture gas comprising 20 to 80% by volume of hydrogen gas and 0 to 80% by volume of an inert gas, whereby surfaces of the silicon steel sheet are given a mirror surface. Subsequently, tensile stress additive films are formed on the surfaces of the silicon steel sheet, and consequently, the resultant silicon steel sheet exhibits a remarkably reduced watt loss.

Abstract: A method of manufacturing a heat resisting magnetic scale is disclosed which comprises a manufacturing process in which at least a part of a heat resisting base is heated and immediately cooled for the purpose of fusing the heated part to the base and changing both the magnetic characteristics of the part of the base which has been heated and the Curie point of the part which has been heated is raised to 100.degree. C. or higher.

Abstract: A method is provided to reduce the core loss measured at frequencies of 60 Hz or higher in light-gauge, grain-oriented, silicon steel sheet or strip of less than 7 mil thickness and conventional permeability of .mu.10<1850 at 60 Hz, the method includes coating such steel with tension-inducing stress coatings in order to exert tensile stresses on the silicon steel of at least approximately 600 psi and further provides a method with the step of preparing the surfaces of the light-gage, grain-oriented, silicon steel products to support the stresses of the applied tension-inducing stress coatings in order to prevent spalling of the coatings.

Abstract: Permanent domain refinement of grain oriented electrical steel strip is obtained in a high speed two-stage process. The process removes the glass in narrow regions which just expose the base metal. An electrolytic etch is then used to deepen the region into the base metal and minimize damage to the remaining glass film. Control of acid concentration and temperature in the electrolytic bath allows a greater increase in productivity. A further feature of the process is the use of permeability measurements to optimize the depth of the etched regions. The improved core loss produced by the process will survive a stress relief anneal.

Abstract: The present invention relates to a process for producing permanent domain refinement continuously and at very high line speeds in grain oriented electrical steel having an aluminum nitride inhibitor system. After the final high temperature anneal, the glass film and insulative coating on the surface is removed in narrow bands (grooves or rows of spots). The steel is electroetched to increase the depth of the bands, coated with aluminum by electrophoresis and given a stress relief anneal to bond the aluminum coating to the base metal by diffusion. A localized stress field is induced during cooling which causes domain refinement due to the differential thermal contraction between the aluminum and the base metal.

Abstract: To obtain an anticorrosive Fe-B-R type permanent magnet; in particular, to reduce deterioration rate of the initial magnetic properties below 10% after the magnet has been kept at 80.degree. C. in 90% relative humidity for 500 hours, the surface of the sintered permanent magnet is coated with metallic coating film layers of at least one noble metal layer and at least one base metal layer disposed on the noble metal layer. Diffusion heat treatment further improves the adhesiveness of the coating film layers.

Abstract: A method of manufacturing a heat resisting magnetic scale is disclosed which comprises a manufacturing process in which at least a part of a heat resisting base is heated and a manufacturing process in which the part which has been heated is immediately cooled down for the purpose of changing the magnetic characteristics of the part of the base which has been heated and the Curie point of the part which has been heated is raised to 100.degree. C. or higher.A heating resisting magnetic scale which cannot be demagnetized at high temperatures and cannot be separated even if it is subjected to rapid change in temperatures, and which exhibits excellent stability and measuring precision.

Abstract: A method is provided for domain refinement of electrical sheet products, such as grain-oriented silicon steel and amorphous magnetic materials, by subjecting at least one surface of the steel to an electron beam treatment to produce narrow substantially parallel bands of treated regions separated by untreated regions substantially transverse to the direction of strip manufacture to improve core loss without damaging the surface or any coating thereon.

Abstract: A method is provided for refining the magnetic domain wall spacing of grain-oriented silicon steel having a forsterite base coating thereon by removing portions of the base coating to expose a pattern of the underlying silicon steel, providing the exposed silicon steel with an environment selected from the group of phosphorus and phosphorus-bearing compounds, and then annealing the exposed steel, which is free of thermal and plastic stresses, in the phosphorus environment in a reducing atmosphere to produce in the steel a line of permanent bodies containing a phosphorus-bearing compound to effect heat resistant domain refinement and reduced core loss.A semi-finished sheet product of final texture annealed grain-oriented silicon steel is also provided.

Abstract: An extra-low iron loss grain oriented silicon steel sheet is produced by irradiating electron beam to an insulation coating formed on a grain oriented silicon steel sheet after finish annealing in a direction crossing the rolling direction of the sheet, whereby the magnetic properties are not degraded even if the steel sheet is subjected to a strain relief annealing. If necessary, an inert gas may be introduced into the vicinity of electron beam irradiated zone of the coating.

Abstract: A method is provided for refining the magnetic domain wall spacing of grain-oriented silicon steel sheet having an insulation base coating thereon by removing portions of the base coating to expose a line pattern of the underlying silicon steel substantially transverse to the rolling direction of the steel, applying a metallic contaminant to the steel, the exposed steel being free of thermal and plastic stresses, and thereafter annealing the steel and contaminant thereon at time and temperatures of about 1400.degree. F. or more in a protective atmosphere to diffuse sufficient and controlled amounts of the comtaninant into the steel to produce a permanent pore stable up to 2100.degree. F. to effect heat resistant domain refinement and reduce core loss.

Abstract: Ultra-rapid annealing of grain oriented electrical steel to a temperature prior to the final high temperature anneal results in improved texture and smaller secondary grain size. The ultra-rapid anneal requires heating the strip to a temperature above about 675.degree. C. (1250.degree. F.) at a rate above 100.degree. C. per second (180.degree. F. per second). The ultra-rapid anneal is performed after the first stage of cold rolling and prior to or as part of the decarburization anneal. The material will survive a subsequent stress relief anneal and may be further improved by various domain treatments. The ultra-rapid anneal increases productivity and procedures improved core loss properties.

Abstract: Ultra-rapid annealing of nonoriented electrical steel is conducted at a rate above 100.degree. C. per second on prior to or as part of the strip decarburization and/or annealing process to provide an improved texture and, thereby, improved permeability and reduced core loss. During the ultra-rapid heating of cold-rolled strip, the recrystallization texture is enhanced by more preferential nucleation of {100}<uvw> and {110}<uvw> oriented crystals and reduced formation of {111}<uvw> oriented crystals. The preferred practice has a heating rate above 262.degree. C. per second to a peak temperature between 750.degree. C. and 1150.degree. C. and held at temperature for 0 to 5 minutes.

Abstract: Ion implantation is conducted in a desired area(s) of the surface of a magnetic layer, and annealing of the layer is carried out to control the composition in that desired area(s). The control of the composition may be facilitated by applying a one-directional or rotating magnetic field during ion implantation. In preparing a magnetic head, a portion of a magnetic pole at least on one side thereof in close proximity to a magnetic recording medium is formed into an iron or iron-based magnetic alloy film, at least part of which is subjected to ion implantation and annealing.

Abstract: A method of rapidly annealing an amorphous alloy consisting of applying a magnetic field to the alloy, immersing the alloy in a liquid comprising molten tin and then placing the amorphous alloy in a cooling fluid. The cooling fluid may be an organic liquid or liquefied gas. Rapid magnetic annealing provides advantages not only of less time and energy costs, but also yields an annealed alloy that is more ductile than those of the prior art. The greater ductility permits the amorphous alloy to be annealed by this method and then rewound into a core.

Abstract: A rapidly quenched Fe-Si alloy containing 6 to 7 wt % Si is heat treated to promote and control an order-disorder reaction, thereby improving its ac core loss and exciting power at induction levels above B=1.2 T. The alloy has a substantially <100> texture, a grain size of about 1 to 2 mm, a B2 domain size of 100 to 850 nm, a DO3 domain size of about 5 to 25 nm, an ac core loss of about 1.2 to 1.6 W/kg and an exciting power of about 15 to 46 VA/kg, the core loss and exciting power being measured at an induction level of B=1.4 T and a frequency of f=60 Hz.

Abstract: A method of preparing an oxygen-containing ferromagnetic amorphous alloy comprising the step of: sputtering an oxygen-containing composite target composed of an oxide and a metal or metal alloy, thereby forming a film of the amorphous alloy on a substrate, the amorphous alloy consisting of:M.sub.x G.sub.y O.sub.zwhere M is one or more transition metals of Fe, Co and Ni; or a combination of the transition metal or metals and one or more metals selected from the group consisting of V, Cr, Mn, Nb, Mo, Hf, Ta, W, Pt, Sm, Gd, Tb, Dy and Ho; G is one or more elements selected from the group consisting of B, Ge, As, Sb, Ti, Sn and Zr; oxygen (O) is supplied by the oxide; and x, y and z are the atomic percentages of M, G and O and x+y+z=100, the composition of the amorphous alloy being in the pentagonal hatched zone in FIG. 1 and the pentagonal zone being defined by the lines joining the points of A (80, 19, 1), B (50, 49, 1), C (36, 36, 28), D (36, 4, 60) and E (38.5, 1.5, 60) shown in FIG. 1.

Abstract: A method for improving the magnetic properties of a core fabricated from at least one strip of amorphous metal wound about itself to form adjacent laminations in the shape or a closed loop is disclosed. In accordance with the method, a force in tension of predetermined strength is applied to the loop from the innermost lamination of the loop outwardly. While this tensile force is being applied, the loop is annealed simultaneously and subjected to a magnetic field of predetermined strength.

Abstract: A method of rapidly annealing an amorphous metal core consists of applying a magnetic field to the core, immersing the core in a hot liquid for a period of time, and then placing the core in a cooling fluid. The hot liquid is preferably a molten metal or molten metal alloy, such as molten tin or solder. The cooling fluid may be an organic liquid or liquefied gas. Rapid magnetic annealing provides advantages not only of less time and energy costs, but also yields an annealed core that is more ductile than those of the prior art. The greater ductility permits a wound core to be annealed by this method and then rewound into another core.

Abstract: A method for treating cast amorphous metal strip material. The method comprises heating a cast amorphous metal strip to a temperature of approximately 250.degree. in a non-oxidizing atmosphere, thereafter removing the cast amorphous strip from that atmosphere, and applying a tensile force to the strip material to eliminate elastic buckling therefrom.

Abstract: A cold rolled steel strip contains alloying elements, such as Al and Si, which have an affinity for oxygen greater than that of iron. During annealing of the strip, these alloying elements undergo oxidation to form an internal oxidation layer adjacent the surface of the strip. Formation of such an internal oxidation layer in the cold rolled steel strip is impeded by adding antimony to the steel, and depletion of the antimony prior to annealing the cold rolled strip is minimized by minimizing annealing and pickling of the strip before the strip attains substantially its final thickness.

Abstract: A process of providing an inorganic anti-stick coating directly on non-oriented, semi-processed electrical steels by applying to such steels a coating solution containing Al.sup.+++, Mg.sup.++, and H.sub.2 PO.sub.4.sup.- in a specified relative relationship, the concentration of Al.sup.+++, Mg.sup.++, and H.sub.2 PO.sub.4.sup.- comprising 100 parts by weight calculated as Al.sub.2 O.sub.3, MgO and H.sub.3 PO.sub.4, respectively, on a water-free basis. The coating solution may additionally contain from 0 to 150 parts by weight of colloidal silica on a water-free basis. Chromic anhydride (C.sub.r O.sub.3) may be added to the coating solution to improve its wettability and improve the moisture resistance of the anti-stick coating. The coating solution is so diluted with water as to provide a uniform coating as thin as possible to prevent lamination sticking and having a coating weight of less than 2 grams per square meter on each side.

Abstract: A technique for processing thin tapes of soft magnetic amorphous metal alloys to reduce their magnetic hysteresis losses. The technique involves preliminarily forming such a tape into a core, heating the core, and then controllably cooling the core, the heating and cooling being conducted in an oxidizing atmosphere. Maintaining the core during processing in a suitable longitudinal or transverse (relative to the tape) magnetic field can also produce improved properties. Certain tape cores so processed have particular magnetic hysteresis loss characteristics never heretofore known.

Abstract: This is a method of producing grain-oriented, iron sheet for electrical applications. The process utilizes relatively pure iron which is deoxidized to have less than 50 ppm of oxygen. The carbon content is adjusted to 0.01-0.02 wt. % (preferably 0.010-0.015 wt. %). The material is hot rolled at a temperature of at least 800.degree. C., cold rolled with a 60-75% reduction, recrystallized in an non-oxidizing atmosphere at 700.degree.-820.degree. C., cold rolled a second time with a 60-75% reduction, annealed at 700.degree.-825.degree. C. in a non-oxidizing atmosphere and cold rolled a third time with a 60-75% reduction and final annealed at 850.degree.-900.degree. C. for 50-200 hours in a reducing atmosphere.

Abstract: A magnetic head having a high wear resistance and high workability such as by grinding, and a method for manufacturing the same. According to this method, at least a portion of that surface of the core forming the magnetic head or shielding case, which is to be brought into contact with a magnetic recording medium, is subjected to a boronizing treatment to form a boronized layer.

Abstract: A magnetic powder is prepared by dispersing iron oxide or iron oxide hydrate which can be coated or doped with at least one of cobalt, nickel, tin, titanium, bismuth, zinc or antimony or its compound, as the starting material into an aqueous solution of a water soluble resin and separating the powder and heating it in a reducing atmosphere to reduce it.

Abstract: A sputtered thin film of an amorphous material composed of a magnetic transition metal X and element Y plus possibly an element Z has low coercivity for domains in the plane, has a well defined and stable magnetic easy axis which is extremely stable without heating above the Curie point, with a high and flat value of permeability from low frequencies to greater than 10 megahertz. Metal X can include at least one of Fe, Ni, and Co. Element Y can include at least one of Si and B. Element Z can be included composed of Cr, for example.

Abstract: A magnetic alloy is cast as an amorphous metal ribbon and wound on a rotor shaft of a hysteresis motor and then heated to crystallize the metal ribbon and greatly increase its coercive force prior to assembling the rotor with the stator of the motor.

Abstract: The easy direction of magnetization of an amorphous magnetic film is brought in the plane of the film by annealing this film in an oxygen-free atmosphere composed of a gas selected from the group comprising argon, neon, krypton and xenon at a temperature below the temperature of crystallization of the alloy which constitutes the film. The depth of penetration of the rare gas into the film is adjusted by modifying the parameters of annealing temperature and time in order to modify the easy direction of magnetization to a greater or lesser depth within the film.

Abstract: An amorphous alloy including iron, carbon and boron characterized by exceptional magnetic induction properties at room temperature, rendering it particularly suitable for use as the core of a power transformer. The alloy includes 83 to 90 atomic % iron, 2 to 13 atomic % carbon, and 4 to 15 atomic % boron, the total boron and carbon content ranging from 10 to 17 atomic %. If desired, up to 10% of the iron can be replaced by cobalt or nickel, while up to 2% of the carbon can be replaced by silicon or germanium.

Abstract: A method of manufacturing a corrosion resistant rotor assembly including heating the core of the rotor assembly which is made of a stack of thin steel laminations to a temperature sufficient so as to cause at least some oxidation of the core and the quenching the core in a temperature controlled bath of suitable oil so as to form a tough, corrosion resistant surface on the exposed surfaces of the rotor assembly.

Abstract: A method according to the present invention is intended for treating items (articles) for magnetically soft alloys employed in radio-electronic, relay and switching apparatus, in optical-and-mechanical and automation systems. The method consists in saturating the surface of items with chromium inside a powder chromizing mixture at a temperature in excess of 800.degree. C. The items are heated at a rate not higher than that of recrystallization of a metal of the items, and the rate of diffusion processes of saturating the items. The items are cooled at a rate close to that of phase transformations and formation of a magnetic structure in the metal of the items, for example, at the rate of 20-200 degree/hour below the Curie point. To enhance the magnetic properties and the stability thereof, as well as wearability and the resistance of the items to corrosion, chromizing of the item surfaces is conducted in an inert gas atmosphere.

Abstract: Permanent-magnet alloys having the general formulaRE(Co.sub.1-u-v-w-x-y Fe.sub.u Mn.sub.v Cr.sub.w V.sub.x X.sub.y).sub.zwherein RE is samarium, cerium, cerium mischmetal (MM), praseodymium, neodymium, lanthanum or mixtures thereof, X is Al, Cu or mixture thereof, and______________________________________ 0.05 < u < 0.15 0.084 .ltoreq. u < 0.15 0.003 .ltoreq. v < 0.15 0.02 < v < 0.15 0.003 .ltoreq. w < 0.10 0 = w 0.003 .ltoreq. x < 0.10 0 = x 0.05 < y < 0.20 0.05 < y < 0.20 6.5 < z < 8.5 6.5 < z < 8.5 0.084 .ltoreq. u < 0.15 0.05 < u < 0.15 0 = v 0.02 < v < 0.15 0.02 < x < 0.10 0.02 < w < 0.10 0 = w 0.02 < x < 0.10 0.05 < y < 0.20 0.05 < y < 0.20 6.5 < z < 8.5 6.5 < z < 8.

Abstract: Aluminium or silicon is diffused into iron (including silicon-iron) by applying to the iron an aqueous paste containing powdered aluminium/silicon, sodium silicate, and optionally magnesium oxide and colloidal silica, and firing it.

Abstract: A magnetostrictive pressure transducer is disclosed wherein pressure in the range of zero to 1000 psi can be accurately measured. The pressure transducer apparatus includes a diaphragm causing the pressure to be applied unidirectionally on sensor material having the property of undergoing changes in magnetic induction when a pressure is applied thereto, the change in magnetic induction being related to the applied pressure. The change in magnetic induction is measured and thus provides a measurement of the applied pressure. Several embodiments are also disclosed for measuring vacuum. In these embodiments force is also applied unidirectionally on the sensor material.

Abstract: A process of producing an electrically insulative glass film on cold reduced silicon steel strip or sheet stock which will have a magnetic permeability greater than 1850 at 796 A/m after a final high temperature anneal which develops cube-on-edge orientation, which comprises applying an aqueous slurry containing magnesia, at least one boron compound, and up to 20% titanium dioxide, based on the weight of magnesia, drying the coating, and subjecting the coated stock to said final anneal, the total boron content being proportioned within the range of about 0.07% to about 0.30%, based on the weight of magnesia, in accordance with any two of the three parameters: particle size distribution, citric acid activity, and surface area, i.e., inversely to the bulk density of the dried coating. Improved core loss characteristics are obtained without sacrifice of permeability values.

Abstract: Improved core losses at high operating inductions are obtained in (110) [001] oriented silicon iron through the application of a new coating to the finish gauge material and thereafter heat treating to effect transformation of the underlying steel to the (110) [001] orientation, desulfurizing the underlying steel as well as decarburizing the same. The coating, as fused, is characterized by excellent adherence and a high interlaminar resistance value.

Abstract: A method of making pressed magnetic core components characterized by coating particles of annealed low carbon ferrous alloy with a coating of hydrated magnesium silicate.

Abstract: A method of making pressed magnetic core components having a low core loss property for use in electrical apparatus characterized by reannealing and repressing said components after initial annealing and pressing.

Abstract: A method of making compact cores for use in direct current magnetic apparatus characterized by the steps of severing particles from thin, flat strips of ferrous alloys, said particles being substantially of elongated rectangular shape, annealing said laminations in decarburizing and deoxidizing atmosphere to improve the magnetic characteristics by reducing carbon to less than 0.01% and relieving stresses, compressing the particles into a solidified configuration of the desired core component, and annealing the core component at a temperature upwards of 2200.degree. F. in a non-oxidizing atmosphere to improve the permeability and coercive force values.

Abstract: A permanent magnetic material, predominantly containing cerium misch-metal (CeMM) and cobalt, characterized by the composition:(CeMM.sub.1-x RE.sub.x).sub.1-y Sm.sub.y Co.sub.5.+-.0.2wherein0<x<0.5; 0.ltoreq.y.ltoreq.0.25,wherein cerium misch-metal approximately possesses the compositionCe.sub..alpha. La.sub..beta. Nd.sub..gamma. Pr.sub..delta., where0.45<.alpha.<0.550.20<.beta.<0.400.05<.gamma.<0.150.00<.delta.<0.05 and .alpha.+.beta.+.gamma.+.delta..perspectiveto.1.And wherein RE consists of the alloyNd.sub.A Pr.sub.B (Ce, La, Sm).sub.Cwherein A is 0.75, B is 0.22, C is less than 0.03 and A+B+C=1.