Abstract: A housing is a housing formed of austenitized ferritic stainless steel including a base formed of a ferrite phase and a surfacing layer formed of an austenitized phase in which the ferrite phase is austenitized, the housing including a first surface exposed to an external space of the housing, and a second surface adjacent to the first surface with a corner portion interposed therebetween, and exposed to the external space, wherein an angle of an internal angle formed by the first surface and the second surface at the corner portion is greater than 0°, and less than 180°, and a surfacing layer at the corner portion is thicker in thickness than a surfacing layer in the first surface and a surfacing layer in the second surface.

Abstract: A watch component includes an austenized ferritic stainless steel, the austenized ferritic stainless steel including a first layer including a ferrite phase, and a second layer including an austenized phase formed of a nitrogen solid solution of the ferrite phase. An average particle size of ferrite crystal grains constituting the ferrite phase is 300 ?m or greater, and an average particle size of austenitic crystal grains constituting the austenized phase is 150 ?m or smaller.

Abstract: An austenized ferritic stainless steel includes a first region including a first soft magnetic layer composed of a ferrite phase, a first non-magnetic layer composed of an austenized phase in which the ferrite phase is austenized, and a first mixed layer in which the ferrite phase and the austenized phase are mixed, the first mixed layer being formed between the first soft magnetic layer and the first non-magnetic layer, and a second region including a second non-magnetic layer composed of the austenized phase, the second non-magnetic layer having a thickness greater than that of the first non-magnetic layer.

Abstract: A method for manufacturing a watch component is a method for manufacturing a watch component that is formed of an austenitized ferritic stainless steel including a base portion formed by a ferrite phase and a surface layer formed by an austenitized phase obtained by austenitizing the ferrite phase. The method includes a first processing step for forming a thinned portion by providing a step in a base material formed of a ferritic stainless steel, a heat treatment step for performing nitrogen absorption treatment on the base material to form the surface layer on an outer surface side of the base portion, and a second processing step for providing a hole portion in the thinned portion.

Abstract: A watch component comprising an austenitic ferritic stainless steel. The austenitic ferritic stainless steel includes a base portion composed of a ferrite phase, a surface layer composed of an austenitic phase, and a mixed layer formed between the base portion and the surface layer, wherein the mixed layer is composed of the ferrite phase and the austenitic phase. The surface layer contains 1.0 to 1.6 mass % of nitrogen, in which the surface layer has, at a surface of the surface layer, an oxide film having a thickness of 2.5 nm or greater, as calculated in terms of oxygen profiles in AES analysis.

Abstract: A watch component includes a metal material obtained by performing a nitrogen absorption treatment on a base material, the base material being a ferritic stainless steel that contains, by mass %, 18 to 22% of Cr, 1.3 to 2.8% of Mo, 0.05 to 0.50% of Nb, less than 0.5% of Ni, less than 0.8% of Mn, less than 0.5% of Si, less than 0.10% of P, less than 0.05% of S, less than 0.05% of N, and less than 0.05% of C, with a remainder thereof being composed of Fe and an unavoidable impurity.

Abstract: A watch component includes an austenized ferritic stainless steel including a base including a ferrite phase, a surface layer formed on a surface of the base, the surface layer including an austenized phase, and a mixed layer formed between the base and the surface layer, the mixed layer being a layer in which the ferrite phase and the austenized phase are mixed. In a cross section taken along a depth direction from the surface, a thickness of the mixed layer is 45% or less of a thickness of the surface layer.

Abstract: A method for manufacturing a watch component is a method for manufacturing a watch component formed of austenitized ferritic stainless steel including a base formed of a ferrite phase and a surfacing layer formed of an austenitized phase in which the ferrite phase is austenitized, the method including a first processing step for forming a hole portion or a recessed portion at a base material formed of ferrite stainless steel, a heat treatment step for performing a nitrogen absorption treatment on the base material to form the surfacing layer at a surface side of the base, and a second processing step for cutting a surfacing layer corresponding to the hole portion or the recessed portion to form the watch component.

Abstract: Provided is a timepiece band that improves durability, water resistance, and fit. The timepiece band includes a first band, which is a single part, configured from metallic glass with an elastic modulus greater than or equal to 30 GPa and less than or equal to 70 GPa, and an elastic limit greater than or equal to 2% and less than or equal to 20%, and a second band, which is also a single part, configured from metallic glass with an elastic modulus greater than or equal to 30 GPa and less than or equal to 70 GPa, and an elastic limit greater than or equal to 2% and less than or equal to 20%.

Abstract: Provided is a timepiece case that does not require a seal ring, such as an O ring, that is made of a resin material. The timepiece case includes a case body configured from metallic glass; and a button part that is formed integrally with the case body and is flexible.

Abstract: A method for manufacturing a watch component is a method for manufacturing a watch component that is formed of an austenitized ferritic stainless steel including a base portion formed by a ferrite phase and a surface layer formed by an austenitized phase obtained by austenitizing the ferrite phase. The method includes a first processing step for forming a thinned portion by providing a step in a base material formed of a ferritic stainless steel, a heat treatment step for performing nitrogen absorption treatment on the base material to form the surface layer on an outer surface side of the base portion, and a second processing step for providing a hole portion in the thinned portion.

Abstract: A method for manufacturing a watch component is a method for manufacturing a watch component formed of austenitized ferritic stainless steel including a base formed of a ferrite phase and a surfacing layer formed of an austenitized phase in which the ferrite phase is austenitized, the method including a first processing step for forming a hole portion or a recessed portion at a base material formed of ferrite stainless steel, a heat treatment step for performing a nitrogen absorption treatment on the base material to form the surfacing layer at a surface side of the base, and a second processing step for cutting a surfacing layer corresponding to the hole portion or the recessed portion to form the watch component.

Abstract: A housing is a housing formed of austenitized ferritic stainless steel including a base formed of a ferrite phase and a surfacing layer formed of an austenitized phase in which the ferrite phase is austenitized, the housing including a first surface exposed to an external space of the housing, and a second surface adjacent to the first surface with a corner portion interposed therebetween, and exposed to the external space, wherein an angle of an internal angle formed by the first surface and the second surface at the corner portion is greater than 0°, and less than 180°, and a surfacing layer at the corner portion is thicker in thickness than a surfacing layer in the first surface and a surfacing layer in the second surface.

Abstract: A watch component includes a first region including a first soft magnetic layer composed of a ferrite phase, a first non-magnetic layer composed of an austenized phase in which the ferrite phase is austenized, and a first mixed layer in which the ferrite phase and the austenized phase are mixed, the first mixed layer being formed between the first soft magnetic layer and the first non-magnetic layer, and a second region including a second non-magnetic layer composed of the austenized phase, the second non-magnetic layer having a thickness greater than that of the first non-magnetic layer.

Abstract: A watch component includes an austenized ferritic stainless steel, the austenized ferritic stainless steel including a first layer including a ferrite phase, and a second layer including an austenized phase formed of a nitrogen solid solution of the ferrite phase. An average particle size of ferrite crystal grains constituting the ferrite phase is 300 ?m or greater, and an average particle size of austenitic crystal grains constituting the austenized phase is 150 ?m or smaller.

Abstract: A watch component is comprising an austenitic ferritic stainless steel, the austenitic ferritic stainless steel including a base portion composed of a ferrite phase, a surface layer composed of an austenitic phase, and a mixed layer formed between the base portion and the surface layer, the mixed layer being composed of the ferrite phase and the austenitic phase, in which the base portion contains Cr: 18 to 22 mass %, Mo: 1.3 to 2.8 mass %, Nb: 0.05 to 0.50 mass %, Cu: 0.1 to 0.8 mass %, Ni: less than 0.5 mass %, Mn: less than 0.8 mass %, Si: less than 0.5 mass %, P: less than 0.10 mass %, S: less than 0.05 mass %, N: less than 0.05 mass %, C: less than 0.05 mass %, and a balance being composed of Fe and inevitable impurities, in which the surface layer contains 1.0 to 1.6 mass % of nitrogen, in which the surface layer has, at a surface of the surface layer, an oxide film having a thickness of 2.5 nm or greater, as calculated in terms of oxygen profiles in AES analysis.

Abstract: A watch component includes an austenized ferritic stainless steel including a base including a ferrite phase, a surface layer formed on a surface of the base, the surface layer including an austenized phase, and a mixed layer formed between the base and the surface layer, the mixed layer being a layer in which the ferrite phase and the austenized phase are mixed. In a cross section taken along a depth direction from the surface, a thickness of the mixed layer is 45% or less of a thickness of the surface layer.

Abstract: A watch component includes a metal material obtained by performing a nitrogen absorption treatment on a base material, the base material being a ferritic stainless steel that contains, by mass %, 18 to 22% of Cr, 1.3 to 2.8% of Mo, 0.05 to 0.50% of Nb, less than 0.5% of Ni, less than 0.8% of Mn, less than 0.5% of Si, less than 0.10% of P, less than 0.05% of S, less than 0.05% of N, and less than 0.05% of C, with a remainder thereof being composed of Fe and an unavoidable impurity.

Abstract: Provided is a timepiece case that does not require a seal ring, such as an O ring, that is made of a resin material. The timepiece case includes a case body configured from metallic glass; and a button part that is formed integrally with the case body and is flexible.

Abstract: Provided is a timepiece band that improves durability, water resistance, and fit. The timepiece band includes a first band, which is a single part, configured from metallic glass with an elastic modulus greater than or equal to 30 GPa and less than or equal to 70 GPa, and an elastic limit greater than or equal to 2% and less than or equal to 20%, and a second band, which is also a single part, configured from metallic glass with an elastic modulus greater than or equal to 30 GPa and less than or equal to 70 GPa, and an elastic limit greater than or equal to 2% and less than or equal to 20%.