A strain-hardenable stainless steel alloy includes hard secondary phases dispersed in an austenitic primary phase, the alloy including 0.3-0.6% nitrogen by weight.

The present invention provides an annealed steel material having a composition containing, in mass %, 0.28C0.42, 0.01Si1.50, 0.20Mn1.20, 4.80Cr6.00, 0.80Mo3.20, 0.40V1.20, and 0.002N0.080, with the balance being Fe and unavoidable impurities; in which the annealed steel material has a cross-sectional size of a thickness of 200 mm or more and a width of 250 mm or more, and a hardness of 100 HRB or less; and in which a diameter of a largest ferritic grain observed in a microstructure is 120 m or less in terms of a perfect circle equivalent, an area ratio of carbides is 3.0% or more and less than 10.5%, and an average particle diameter of the carbides is 0.18 m or more and 0.29 m or less.

Provided is a heat treatment apparatus capable of being configured to be more compact.

A heat treatment apparatus 1 includes a coolant passage defining body 42 to define a coolant passage 48 to supply a coolant to a workpiece 100. The coolant passage defining body 42 includes an upper member 50 and a lower member 40 as a plurality of coolant passage defining members, and is configured so that, by displacing these members 49 and 50 so as to approach each other along an up-down direction Z1 crossing a conveyance direction, the coolant passage 48 is defined in a state housing the workpiece 100. In addition, the coolant passage defining body is configured so that, by displacing the members 49 and 50 described above so as to separate from each other along the up-down direction Z1, the workpiece 100 is allowed to be let into and out of the coolant passage 48 along the conveyance direction A1.

A workpiece carrier and method for producing a workpiece carrier (10) for providing and handling workpieces in high-temperature ovens for high-temperature treatment or similar, said workpiece carrier being made of a support grid (11) having workpiece holders (12) for positioning workpieces on the workpiece carrier, said support grid being made of support struts (14, 15, 16, 17, 19, 20) forming a grid structure (21), said support struts being made of carbon fiber-reinforced carbon (CFC), said workpiece holders being made of positioning devices (22) of the work-piece carrier arranged on the support struts, said positioning devices being arranged on the support struts such that the workpiece can be arranged on the workpiece holder in a predetermined position, said positioning devices comprising a bearing element (24) made of a ceramic fiber composite material, said positioning device being a support element (23) arranged on a support strut for arranging the bearing element.

The disclosure relates to a method for producing a shaped sheet metal part from a billet by UO forming. First, a preform is created by the U-forming. Then, final forming to give a final form is carried out by the O-forming. The preform has in cross section a maximum width that is smaller than the maximum width of the final form produced after the O-forming.

The disclosure relates to a method for producing a shaped sheet metal part from a billet by UO forming. First, a preform is created by the U-forming. Then, final forming to give a final form is carried out by the O-forming. The preform has in cross section a maximum width that is smaller than the maximum width of the final form produced after the O-forming.

To provide a galvanized steel sheet for hot pressing which can achieve heating for suppressing the occurrence of LME cracks in a short time during a hot pressing process, and a method of manufacturing a hot press-formed product obtained by performing hot pressing using the galvanized steel sheet. Disclosed is a galvanized steel sheet for use in hot pressing, including a galvanized layer and a base steel sheet, wherein internal oxide is present on a side of the base steel sheet from an interface between the galvanized layer and the base steel sheet, the base steel sheet including defined C, Si, Mn, and Cr, with the balance being iron and inevitable impurities, wherein the base steel sheet satisfies the following formula (1):

(2?[Si]/28.1+[Mn]/54.9+1.5?[Cr]/52.0)?0.05(1)

wherein, in the formula (1), [Si] represents a Si content in mass % of the base steel sheet, [Mn] represents a Mn content in mass % of the base steel sheet, and [Cr] represents a Cr content in mass % of the base steel sheet.

Provided are a chain component that has a simple surface treatment structure and can maintain good wear resistance over a long time, and a chain that includes the chain component and maintains good wear elongation resistance. The chain component of a power transmission chain for industrial use includes a chromium nitride layer formed on an outer side of a steel base material and containing more than 0 mass % but not more than 55 mass % iron. At least a surface of the chromium nitride layer that slides against other components is a rough surface with peaks and valleys.

A tool for machining a workpiece may comprise multiple parts that have different temperatures when the tool is being operated. To reduce or, in some cases, eliminate thermal radiation between the multiple parts, the tool may incorporate one or more devices that manipulate the thermal radiation. Such devices may be disposed along one or more of the multiple parts and, in some examples, between two or more parts of the tool. These devices may also help reduce and, at times, eliminate thermal radiation between the tool parts and the surrounding environment.

An objective of the invention is to provide an austenitic stainless steel article having superior irradiation resistance and stress corrosion cracking resistance than before while maintaining mechanical properties equivalent to those of conventional ones. There is provided a dispersion strengthened austenitic stainless steel article, including: 16-26 mass % of Cr; 8-22 mass % of Ni; 0.005-0.08 mass % of C; 0.002-0.1 mass % of N; 0.02-0.4 mass % of O; at least one of 0.2-2.8 mass % of Zr, 0.4-5 mass % of Ta, and 0.2-2.6 mass % of Ti; and a balance consisting of Fe and inevitable impurities. The Zr, Ta and Ti components form inclusion particles in the stainless steel article by combining with the C, N and O components. The stainless steel article has an average grain size of 1 m or less and a maximum grain size of 5 m or less.