Himeji, Japan
Himeji, Japan

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Patent
Sanyo Special Steel Co. | Date: 2017-01-18

There is provided a precipitation hardening stainless steel powder comprising, in percentage by mass: Si: 1.0%; Mn: 1.8%; Ni: 3.0 to 8.5%; Cr: 12.0 to 20.0%; Mo: 0.1 to 2.5%; Cu: 1.0 to 5.0% and/or Ti + Al: 1.0 to 5.0%; Nb + Ta 5C or Nb 5C; N 350 ppm; and the balance being Fe and incidental impurities, wherein a sintered compact fabricated from the steel powder has a martensite content of 90% or more. The precipitation hardening stainless steel powder provides a sintered compact that exhibits high strength after aging.


Patent
Toyota Motor Corporation, Sanyo Special Steel Co. and Fine Sinter Co. | Date: 2015-07-31

The object of the present invention is to provide a compact for producing a sintered alloy which allows a sintered alloy obtained by sintering the compact to have improved mechanical strength and wear resistance, a wear-resistant iron-based sintered alloy, and a method for producing the same. The wear-resistant iron-based sintered alloy is produced by: forming a compact for producing a sintered alloy from a powder mixture containing a hard powder, a graphite powder, and an iron-based powder by powder compacting; and sintering the compact for producing a sintered alloy while diffusing C in the graphite powder of the compact for producing a sintered alloy in hard particles that constitute the hard powder. The hard particles contain 10% to 50% by mass of Mo, 3% to 20% by mass of Cr, and 2% to 15% by mass of Mn, with the balance made up of incidental impurities and Fe, and the hard powder and the graphite powder contained in the powder mixture account for 5% to 60% by mass and 0.5% to 2.0% by mass of the total amount of the hard powder, the graphite powder, and the iron-based powder, respectively.


Patent
Sanyo Special Steel Co. | Date: 2014-12-10

Disclosed is a Si-based alloy anode material for lithium ion secondary batteries. This Si-based alloy anode material comprises an alloy phase composed of a Si principal phase comprising Si and a compound phase comprising two or more elements. The two or more elements comprise a first additional element A being at least one selected from the group consisting of Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zr, Nb and Mg and a low-melting second additional element B being at least one selected from the group consisting of S, Se, Te, Sn, In, Ga, Pb, Bi, Zn, Al and Ag. This compound phase comprises (i) a first compound phase comprising Si and the first additional element A; a second compound phase comprising the first additional element A and the second additional element B; and one or both of a third compound phase comprising two or more of the second additional elements B and a single phase of the second additional element B, or, alternatively, comprises (ii) a compound phase comprising Si and the first additional element A; and one or both of a compound phase comprising two or more of the second additional elements B and a single phase of the second additional element B. The Si principal phase has an average minor axis width of 4m or less. This anode material of the present invention enables provision of secondary batteries having satisfactory performances both in charge-discharge capacity and cycle life.


Patent
Sanyo Special Steel Co. | Date: 2014-08-07

There is provided a steel, having an excellent rolling fatigue life, wherein an oxygen content in the steel is 8 ppm or less, a sulfur content is 0.008 mass % or less, and an Al content is 0.005 to 0.030 mass %, the number of non-metallic inclusions having an inclusion diameter of 20 m or more and less than 100 m, detected per steel material volume of 1000 mm^(3 )by ultrasonic flaw detection, is 12.0 or less, the number of non-metallic inclusions having an inclusion diameter of 100 m or more, detected per steel material weight of 2.5 kg by the ultrasonic flaw detection, is 2.0 or less, the mass % ratio of (MgO)/(Al_(2)O_(3)) in the average composition of MgOAl_(2)O_(3)-based oxides present in the steel is regulated into a range of 0.25 to 1.50, and the number ratio of the MgOAl_(2)O_(3)-based oxides to all oxide-based inclusions is 70% or more.


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/210 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 0.20Fe/(Fe+Co)0.65 (at % ratio) with unavoidable impurities.


It is an object of the present invention to provide an alloy powder that has high hardness and high corrosion resistance and can be produced from inexpensive raw materials, as well as to provide a shot material for shot peening, a powder metallurgical composition, and an iron-based sintered alloy using the alloy powder, and, in order to achieve such an object, there are provided an alloy powder including, in mass %,


Patent
Sanyo Special Steel Co. | Date: 2014-07-25

There is provided a NiCrFe-based alloy brazing filler material to which Cu is added, and which has a low melting temperature, and is inexpensive and excellent in corrosion resistance and in strength, for use in manufacture of stainless-steel heat exchangers or the like, specifically, a NiCrFe-based alloy brazing filler material, including, in mass %, Cr: 15 to 30%; Fe: 15 to 30%; Cu: 2.1 to 7.5%; P: 3 to 12%; and Si: 0 to 8%; and the balance being Ni and unavoidable impurities, wherein the total content of Cr and Fe is 30 to 54%, and the total content of P and Si is 7 to 14%.


Patent
Sanyo Special Steel Co. | Date: 2015-03-13

There is provided a precipitation hardening stainless steel powder including, in percentage by mass: Si: 1.0%; Mn: 1.8%; Ni: 3.0 to 8.5%; Cr: 12.0 to 20.0%; Mo: 0.1 to 2.5%; Cu: 1.0 to 5.0% and/or Ti+Al: 1.0 to 5.0%; Nb+Ta5C or Nb5C; N350 ppm; and the balance being Fe and incidental impurities. A sintered compact fabricated from the steel powder has a martensite content of 90% or more. The precipitation hardening stainless steel powder provides a sintered compact that exhibits high strength after aging.


Patent
Sanyo Special Steel Co. | Date: 2014-04-28

A shot peening process involves the steps of providing a steel member having a surface with a Vickers hardness of 920 HV or more and projecting a shot against the steel member, the shot having a Vickers hardness of 1000 HV or more and a density of 5.5 Mg/m^(3 )or more. The shot satisfies the relationship HV_(shot)0.4HV_(steel)+620, where HV_(shot )is the Vickers hardness (HV) of the shot, and HV_(steel )is the Vickers hardness (HV) of the surface of the steel member. The resulting steel member has an unprecedentedly high compressive residual stress of 2,200 MPa or more.


Patent
Sanyo Special Steel Co. | Date: 2016-06-15

There is provided a Ni-Cr-Fe-based alloy brazing filler material to which Cu is added, and which has a low melting temperature, and is inexpensive and excellent in corrosion resistance and in strength, for use in manufacture of stainless-steel heat exchangers or the like, specifically, a Ni-Cr-Fe-based alloy brazing filler material, including, in mass%, Cr: 15 to 30%; Fe: 15 to 30%; Cu: 2.1 to 7.5%; P: 3 to 12%; and Si: 0 to 8%; and the balance being Ni and unavoidable impurities, wherein the total content of Cr and Fe is 30 to 54%, and the total content of P and Si is 7 to 14%.

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