Abstract: A component comprising a core part and a surface layer is provided. The core part contains C: 0.01%? and <0.20%, Si: ?1.0%, Mn: 1.5%? and ?3.0%, P: 0.02% or less, S: ?0.06%, Cr: 0.30%? and ?3.0%, Mo: 0.005%? and ?0.40%, V: 0.02%? and ?0.5%, Nb: 0.003%? and ?0.20%, Al: 0.010%? and ?2.0%, Ti: 0.005%< and <0.025%, N: ?0.0200%, Sb: 0.0005%? and ?0.02%, and the balance consisting of Fe and incidental impurities; and a steel microstructure that contains bainite phase in an area ratio of more than 50%. The surface layer has high nitrogen and carbon contents relative to the chemical composition of the core part.

Abstract: Provided is a steel for nitrocarburizing that ensures mechanical workability before nitrocarburizing treatment. A steel for nitrocarburizing comprises: a chemical composition containing, in mass %, C: ?0.02% and <0.15%, Si: ?0.30%, Mn: 1.5-2.5%, P: ?0.025%, S: ?0.06%, Cr: 0.5-2.0%, Mo: 0.005-0.2%, V: 0.02-0.20%, Nb: 0.003-0.20%, Al: >0.020% and ?1.0%, Ti: >0.0050% and ?0.015%, N: ?0.0200%, Sb: 0.0030-0.010%, with a balance being Fe and inevitable impurities, satisfying Expression (1) or (2); and a steel microstructure where an area ratio of bainite phase is >50%, a prior austenite grain size is ?100 ?m, ?300/?m2 Ti precipitates with an equivalent circular particle size of ?30 nm disperse, Sb segregates to prior austenite grain boundaries.

Abstract: Free-cutting steel that has the same or better machinability compared to low-carbon sulfur-lead composite free-cutting steel, despite of no-addition of Pb, is provided. Free-cutting steel contains, in mass %, C: 0.08% or less, Mn: 0.50 to 1.50%, P: 0.100% or less, S: 0.250 to 0.500%, N: 0.0050 to 0.0150%, O: more than 0.0100% and 0.0500% or less, Cr: 0.50 to 1.50%, at least one of Si, Al, or Ti: 0.050 to 0.500% in total, with the balance being Fe and inevitable impurities, with an A value defined by formula (1) satisfying 0.40 to 2.00, and with a B value defined by formula (2) satisfying 1.10×10?3 to 1.50×10?2; and a steel microstructure with distributed 3000 or more sulfide particles with an equivalent circular diameter of 5 ?m or less per mm2.

Abstract: Provided is a free-cutting steel that, despites not containing Pb, has machinability by cutting higher than or equal to that of a low carbon sulfur-lead composite free-cutting steel. A free-cutting steel comprises: a chemical composition that contains, in mass %, C: less than 0.09%, Mn: 0.50% to 1.50%, S: 0.250% to 0.600%, O: more than 0.010% and 0.050% or less, and Cr: 0.50% to 1.50%, with a balance consisting of Fe and inevitable impurities, and in which a A value defined by the following formula (1) is 6.0 to 18.0, and a steel microstructure in which at least 500 particles/mm2 of sulfide of less than 1 ?m in equivalent circle diameter and at least 2000 particles/mm2 of sulfide of 1 ?m to 5 ?m in equivalent circle diameter are distributed.

Abstract: Free-cutting steel includes a specific composition, with an A value defined by a following formula (1) satisfying 4.0 or more and 20.0 or less, and remainder having Fe and an unavoidable impurity; and texture with 1000 or more sulfide particles with an equivalent circle diameter of less than 1 ?m per mm2, 500 or more sulfide particles with an equivalent circle diameter of 1 ?m or more and 5 ?m or less per mm2, and 1000 or more Pb particles with an equivalent circle diameter of 1 ?m or less per mm2, wherein A value=(Mn+5Cr)/S ??(1) here, symbols of elements in the formula indicate contents (% by mass) of the elements.

Abstract: Provided is a steel for nitrocarburizing that can ensure hardened case depth by suppressing precipitation of Cr, V, and Nb in a part of the surface layer very close to the surface. The provided steel comprises: a specific chemical composition satisfying 9.5?([Cr]/52+[V]/50.9+[Nb]/92.9+M)×103?18.5, with the balance being Fe and inevitable impurities; and a steel microstructure in which an area ratio of bainite phase with respect to the entire microstructure is more than 50%.

Abstract: Provided is a steel for nitrocarburizing that ensures mechanical workability before nitrocarburizing treatment. A steel for nitrocarburizing comprises: a chemical composition containing, in mass %, C: ?0.02% and <0.15%, Si: ?0.30%, Mn: 1.5-2.5%, P: ?0.025%, S: ?0.06%, Cr: 0.5-2.0%, Mo: 0.005-0.2%, V: 0.02-0.20%, Nb: 0.003-0.20%, Al: >0.020% and ?1.0%, Ti: >0.0050% and ?0.015%, N: ?0.0200%, Sb: 0.0030-0.010%, with a balance being Fe and inevitable impurities, satisfying Expression (1) or (2); and a steel microstructure where an area ratio of bainite phase is >50%, a prior austenite grain size is ?100 ?m, ?300/?m2 Ti precipitates with an equivalent circular particle size of ?30 nm disperse, Sb segregates to prior austenite grain boundaries.

Abstract: A component comprising a core part and a surface layer is provided. The core part contains C: 0.01%? and <0.20%, Si: ?1.0%, Mn: 1.5%? and ?3.0%, P: 0.02% or less, S: ?0.06%, Cr: 0.30%? and ?3.0%, Mo: 0.005% ? and ?0.40%, V: 0.02% ? and ?0.5%, Nb: 0.003% ? and ?0.20%, Al: 0.010%? and ?2.0%, Ti: 0.005%< and <0.025%, N: <0.0200%, Sb: 0.0005% ? and ?0.02%, and the balance consisting of Fe and incidental impurities; and a steel microstructure that contains bainite phase in an area ratio of more than 50%. The surface layer has high nitrogen and carbon contents relative to the chemical composition of the core part.

Abstract: Provided is a steel for nitrocarburizing that can ensure hardened case depth by suppressing precipitation of Cr, V, and Nb in a part of the surface layer very close to the surface. The provided steel comprises: a specific chemical composition satisfying 9.5?([Cr]/52+[V]/50.9+[Nb]/92.9+M)×103?18.5, with the balance being Fe and inevitable impurities; and a steel microstructure in which an area ratio of bainite phase with respect to the entire microstructure is more than 50%.

Abstract: The steel for nitrocarburizing has a chemical composition that contains C: 0.01% or more and less than 0.20%, Si: 1.0% or less, Mn: 1.5% or more and 3.0% or less, P: 0.02% or less, S: 0.06% or less, Cr: 0.30% or more and 3.0% or less, Mo: 0.005% or more and 0.40% or less, V: 0.02% or more and 0.5% or less, Nb: 0.003% or more and 0.20% or less, Al: 0.010% or more and 2.0% or less, Ti: more than 0.005% and less than 0.025%, N: 0.0200% or less, Sb: 0.0005% or more and 0.02% or less, and the balance consisting of Fe and incidental impurities; and a steel microstructure that contains bainite phase in an area ratio of more than 50%.

Abstract: An acquisition unit acquires presence information of an information processing device of another via server. When the acquisition unit acquires pieces of presence information including the same user account from two or more information processing devices, a status image generation unit generates a status image indicating a status of the user identified by the user account, by referring to the latest presence information. In order to represent the status of the user, the status image generation unit includes a name of an application being run by the user in the status image.

Abstract: An acquisition unit acquires, via a communication unit, presence information including status information indicating the status of execution of an application from a separate information processing device. A status image generation unit refers to the status information and determines a display mode for presenting the status of execution of the application to a user. The status image generation unit determines a display mode of a mark to indicate whether the user can participate in a session of an application.

Abstract: An acquisition unit acquires presence information of an information processing device of another via server. When the acquisition unit acquires pieces of presence information including the same user account from two or more information processing devices, a status image generation unit generates a status image indicating a status of the user identified by the user account, by referring to the latest presence information. In order to represent the status of the user, the status image generation unit includes a name of an application being run by the user in the status image.

Abstract: An acquisition unit acquires presence information of an information processing device of another via server. When the acquisition unit acquires pieces of presence information including the same user account from two or more information processing devices, a status image generation unit generates a status image indicating a status of the user identified by the user account, by referring to the latest presence information. In order to represent the status of the user, the status image generation unit includes a name of an application being run by the user in the status image.

Abstract: An acquisition unit acquires presence information of an information processing device of another via server. When the acquisition unit acquires pieces of presence information including the same user account from two or more information processing devices, a status image generation unit generates a status image indicating a status of the user identified by the user account, by referring to the latest presence information. In order to represent the status of the user, the status image generation unit includes a name of an application being run by the user in the status image.

Abstract: An acquisition unit acquires, via a communication unit, presence information including status information indicating the status of execution of an application from a separate information processing device. A status image generation unit refers to the status information and determines a display mode for presenting the status of execution of the application to a user. The status image generation unit determines a display mode of a mark to indicate whether the user can participate in a session of an application.

Abstract: A ferritic stainless steel sheet having less planar anisotropy and excellent anti-ridging characteristics is disclosed. The sheet includes not more than about 0.02 wt % of C, about 0.01-1.0 wt % of Si, about 0.01-1.0 wt % of Mn, not more than about 0.08 wt % of P, not more than about 0.01 wt % of S, about 0.005-0.30 wt % of Al, about 11-50 wt % of Cr, about 0.1-5.0 wt % of Mo, not more than about 0.03 wt % N, with the contents of C and N satisfying the relations: about 0.005 wt %.ltoreq.(C+N)<about 0.03 wt %, and (C/N)<about 0.6. The sheet also includes Ti in an amount to satisfy the relation: about 5.ltoreq.Ti/(C+N).ltoreq.about 30. The balance of the sheet includes Fe and incidental impurities, with the sheet having an X-ray integral intensity ratio (222)/(310) of not less than about 35 in a plane parallel to a sheet surface at a depth of 1/4 of the sheet thickness from the sheet surface.