Abstract: This steel for induction hardening contains, by percent by mass, C: 0.7 to 0.9%, Si: 0.4 to 1.0%, Mn: 0.5 to 1.25%, P: 0.030% or less, S: 0.030% or less, Cr: 0.4% or less, Al: 0.05% or less, Ti: 0.003% or less, and O: 0.0020% or less, wherein [Mn]?0.5+0.35/[Si] is met, the steel further contains Fe and unavoidable impurity and the steel has annealing hardness of 93 HRB or less, and wherein an induction hardening layer after induction hardening has residual austenite of 20 to 40% and hardness of 61 HRC or more. This makes it possible to provide steel for induction hardening in which lowering of a fatigue life hardly occurs even though foreign objects incorporates into lubricating oil of a motion guide device and concentration of stress on its dent causes flaking due to lubrication failure to be generated on a steel surface of a device, or even though rolling/sliding contact occurs.

Abstract: Disclosed herein is an electronic apparatus produced using a high-temperature lead-free solder alloy which makes it possible to form soldered joints having no variations in strength and which has an excellent balance between strength and solderability. The lead-free solder alloy is an alloy which is made of an element A and an element B and which has a composition composed of AmBn being a stable phase and the element B in an equilibrium state at room temperature. When the lead-free solder alloy is solidified by quenching, the element A is dissolved in a room-temperature stable phase of the element B so that a supersaturated solid solution is formed, and when melted for soldering and then solidified, the alloy returns to its equilibrium state and has a composition composed of the stable phase AmBn and the element B and therefore maintains strength due to the presence of the stable phase AmBn even when reheated to a soldering temperature.

Abstract: There is disclosed a method for producing a Cr-doped FeCoB based target material that can be used efficiently in magnetron sputtering processes and has a low magnetic permeability. In the method for producing the target material, there are firstly provided raw-materials of two or more kinds of FeCoB based alloy powders which are different in composition from each other, wherein at least one of the FeCoB based alloy powders comprises Fe and Co in a total amount of 60 atom % or more such that Fe:Co atomic ratio is within a range of 70:30 to 40:60, and comprises Cr in an amount which is from 15 to 25 atom % greater than B. Then, the two or more kinds of the FeCoB based alloy powder are mixed and consolidated to form a target material.

Abstract: A soft magnetic alloy for perpendicular magnetic recording medium excellent n saturation magnetic flux density, amorphousness and atmospheric corrosion resistance. The alloy is an Fe-Co based alloy and comprises Fe in an amount satisfying 0.25 to 0.65 of Fe/(Fe+Co) ratio, which is an atomic ratio of Fe and Fe+Co; Zr+Hf in an amount of 6 to 100 at %; Na+Ta in an amount of 0 to 2 at %; Al and/or Cr in an amount of 0 to 5 at %; and the balance Co and unavoidable impurities. A part of Zr and/or Hf can be replaced by B, provided that the amount of B to replace Zr and/or Hf is double in at % of the total amount of Zr and Hf to be replaced and that the total amount of Zr and Hf after replacement is 4 at % or more.

Abstract: There are disclosed a laser clad valve seat raw-material powder superior in productivity, cladding property, wear resistance and finishing property, and a laser clad valve seat using the same superior in wear resistance. The row-material powder comprises a powder mixture comprising: 80 to 99% by weight of a Cu-based alloy powder comprising 0.5 to 5% by weight of B, 0 to 20% by weight of Ni, 0 to 10% by weight of Fe plus Co, 0 to 5% by weight of Si, 0 to 3% by weight of Al, and the balance Cu and unavoidable impurities; and 1-20% by weight of an Fe or Co based alloy powder having a Vickers hardness of 500 HV or higher and an average particle diameter of 50 to 200 ?m of and comprising 5 to 40% by weight of Mo, 0 to 25% by weight of Cr, 0 to 5% by weight of Si, and the balance Fe or Co and unavoidable impurities.

Abstract: The present invention provides a high-temperature lead-free solder alloy which has no variation in strength of the soldered portion and has an excellent balance between strength and soldering properties, and a method for producing the alloy. The present invention relates to a lead-free jointing material made of an alloy of two elements A and B selected from elements other than Pb, wherein the element A has a melting point higher than a melting point of the element B, wherein the alloy is an alloy which has a room-temperature stable phase composed of the element B and a room-temperature stable phase AmBn composed of the elements A and B (provided that m and n are specific numerals in accordance with an alloy constituting a stable phase at room temperature) and satisfies AxB1-x (provided that 0<x<m(m+n)), and wherein the element A is supersaturatedly dissolved in the room-temperature stable phase composed of the element B.

Abstract: There are provided a surface coating material for a molten zinc bath member with improved zinc corrosion resistance, a production method thereof, and a molten zinc bath member. The surface coating material comprises WC powder particles and a binder metal. The binder metal comprises Co and a metal element electrochemically nobler than Co and constitutes an alloy structure having a single phase.

Abstract: There are provided a sputtering target material for a soft-magnetic film layer with a high saturation magnetic flux density and high amorphous properties and a method for producing the sputtering target material. The target material is made of an alloy comprising one or more of Zr, Hf, Nb, Ta and B in an amount satisfying 5 at %?(Zr+Hf+Nb+Ta)+B/2?10 at % and having 7 at % or less of B; 0 to 5 at % in total of Al and Cr; and the balance being Co and Fe in an amount satisfying 0.20?Fe/(Fe+Co)?0.65 (at % ratio) with unavoidable impurities.

Abstract: There is provided a method for producing sputtering target materials which are used for a Ni—W based interlayer in a perpendicular magnetic recording medium. In this producing method, a Ni—W based alloy powder is prepared as a raw material powder. The alloy powder comprises 5 to 20 at % of W and the balance Ni and unavoidable impurities and is produced by gas atomization. The raw material powder is consolidated at a temperature ranging from 900 to 1150° C. This producing method makes it possible to significantly restrain expansion of the powder-filled billet in the consolidation step, thus efficiently producing Ni—W based sputtering target materials with stable qualities.

Abstract: A lead-free steel for machine structural use with excellent machinability and low strength an isotropy, which does not contain Pb and is equal to or higher than a conventional D Pb-containing free cutting steel in properties, is provided. This steel includes, on the weight basis, C: 0.10 to 0.65%; Si: 0.03 to 1.00%; Mn: 0.30 to 2.50%; S: 0.03 to 0.35%; Cr: 0.1 to 2.0%; Al: less than 0.010%; Ca: 0.0005 to 0.020%; Mg: 0.0003 to 0.020%; 0: less than 20 ppm; and the balance being Fe and inevitable impurities.

Abstract: A process for producing a high-cleanliness steel which can produce, without relying upon a high-cost remelting process, steel products having cleanliness high enough to satisfy requirements for properties of mechanical parts used under severe environmental conditions. The production process comprises the steps of: transferring a molten steel produced in an arc melting furnace or a converter to a ladle furnace to refine the molten steel; subjecting the molten steel to circulation-type degassing; and casting the molten steel into an ingot, wherein, in transferring the molten steel to the ladle furnace, a deoxidizer including aluminum and silicon, is added to previously deoxidize the molten steel, that is, to perform tapping deoxidation before refining in the ladle refining furnace.

Abstract: A process for producing a high-cleanliness steel is provided which can produce, without relying upon a high-cost remelting process, steel products having cleanliness high enough to satisfy requirements for properties of mechanical parts used under severe environmental conditions. The production process comprises the steps of: transferring a molten steel produced in an arc melting furnace or a converter to a ladle furnace to refine the molten steel; subjecting the molten steel to circulation-type degassing; and casting the molten steel into an ingot, wherein, in transferring the molten steel to the ladle furnace, a deoxidizer including aluminum and silicon, is added to previously deoxidize the molten steel, that is, to perform tapping deoxidation before refining in the ladle refining furnace.

Abstract: A (CoFe)ZrNb/Ta/Hf based target material is provided which is capable of achieving a high sputtering efficiency and a high sputtering effect by increasing the leakage magnetic flux in the magnetron sputtering, and a method for producing the target material. This target material is made of an Fe—Co based alloy comprising not less than 80 atomic % in total of Fe and Co having an Fe:Co atomic ratio of 80:20 to 0:100, and less than 20 atomic % of one or more selected from the group consisting of Zr, Hf, Nb and Ta. The Fe—Co based alloy comprises a Co—Fe phase being a ferromagnetic phase, and the one or more selected from the group consisting of Zr, Hf, Nb and Ta are solid-solved into the Co—Fe phase in a total amount of 0.5 to 2 atomic %.

Abstract: A soft-magnetic FeCo based target material is provided which has a high saturation magnetic flux density and superior atmospheric corrosion resistance. The target material is a soft-magnetic FeCo based target material made of an FeCo based alloy. The FeCo based alloy comprises 0 to 30 at. % of one or more metal elements selected from the group consisting of B, Nb, Zr, Ta, Hf, Ti and V; and the balance being Fe and Co with unavoidable impurities. The Fe:Co atomic ratio ranges from 10:90 to 70:30. The FeCo based alloy may further comprise 0.2 at. % to 5.0 at. % of Al and/or Cr.

Abstract: There are disclosed a laser clad valve seat raw-material powder superior in productivity, cladding property, wear resistance and finishing property, and a laser clad valve seat using the same superior in wear resistance. The row-material powder comprises a powder mixture comprising: 80 to 99% by weight of a Cu-based alloy powder comprising 0.5 to 5% by weight of B, 0 to 20% by weight of Ni, 0 to 10% by weight of Fe plus Co, 0 to 5% by weight of Si, 0 to 3% by weight of Al, and the balance Cu and unavoidable impurities; and 1-20% by weight of an Fe or Co based alloy powder having a Vickers hardness of 500HV or higher and an average particle diameter of 50 to 200 ?m of and comprising 5 to 40% by weight of Mo, 0 to 25% by weight of Cr, 0 to 5% by weight of Si, and the balance Fe or Co and unavoidable impurities.

Abstract: There is disclosed a method for producing a Cr-doped FeCoB based target material that can be used efficiently in magnetron sputtering processes and has a low magnetic permeability. In the method for producing the target material, there are firstly provided raw-materials of two or more kinds of FeCoB based alloy powders which are different in composition from each other, wherein at least one of the FeCoB based alloy powders comprises Fe and Co in a total amount of 60 atom % or more such that Fe:Co atomic ratio is within a range of 70:30 to 40:60, and comprises Cr in an amount which is from 15 to 25 atom % greater than B. Then, the two or more kinds of the FeCoB based alloy powder are mixed and consolidated to form a target material.

Abstract: Disclosed is a production process that can suppress the formation of large-diameter TiN or N-rich TiCN inclusions which adversely affect machinability and consequently can produce a cast steel billet or steel ingot or a steel material of a Ti-added case hardening steel having excellent machinability. The production process comprises the step of casting a steel comprising by weight carbon (C): 0.10 to 0.30%, titanium (Ti): 0.05 to 0.20%, and nitrogen (N): not more than 0.0100% into a round cast steel billet or steel ingot having a diameter of not more than 23 cm or, in the alternative, a rectangular cast steel billet or steel ingot having a short side length of not more than 23 cm.

Abstract: There is disclosed a method for producing a Fe—Co based target material for forming a soft magnetic thin-film. This method comprises the steps of: preparing a first raw-material powder having an Fe:Co weight ratio ranging from 8:2 to 7:3 and a second raw-material powder having an Fe—Co weight ratio ranging from 2:8 to 0:10; mixing the first raw-material powder and the second raw-material powder together to obtain a powder mixture having an Fe:Co weight ratio ranging from 8:2 to 2:8; and applying a pressure of not less than 100 MPa to the powder mixture at a temperature ranging from 1073 to 1473 K for consolidation. At least one additional element selected from the group consisting of Nb, Zr, Ta and Hf is added to either one or both of the first and second raw-material powders in a total amount of 3 to 15 atom % with respect to the total amount of the powder mixture. The Fe—Co based target material thus produced has a high density, while having a magnetic permeability lower than the conventional one.

Abstract: A process for producing a high-cleanliness steel is provided which can produce, without relying upon a high-cost remelting process, steel products having cleanliness high enough to satisfy requirements for properties of mechanical parts used under severe environmental conditions. The production process comprises the steps of: transferring a molten steel produced in an arc melting furnace or a converter to a ladle furnace to refine the molten steel; subjecting the molten steel to circulation-type degassing; and casting the molten steel into an ingot, wherein, in transferring the molten steel to the ladle furnace, a deoxidizer including aluminum and silicon is added to previously deoxidize the molten steel, that is, to perform tapping deoxidation before refining in the ladle refining furnace.

Abstract: There is disclosed a soft magnetic target material with an improved atmospheric resistance without deterioration of magnetic properties. A soft magnetic target material according to the first aspect comprises a Fe—Co based alloy having a Fe:Co atomic ratio of 100:0 to 20:80, wherein the alloy further comprises one or both of Al and Cr of 0.2 to 5 atom %. In addition, a soft magnetic target material according to the second aspect comprises a Fe—Ni based alloy having a Fe:Ni atomic ratio of 100:0 to 20:80, wherein the alloy further comprises one or both of Al and Cr of 0.2 to 5 atom %. In the soft magnetic target materials according to the first and second aspects, the alloys further comprise one or more selected from a group consisting of B, Nb, Zr, Ta, Hf, Ti and V of not more than 30 atom %.