Abstract: A preferable aspect of the present invention provides a high-strength high-toughness hot-rolled steel sheet and a manufacturing method therefor, wherein the hot-rolled steel sheet contains, by weight, 0.07-0.13% C, 0.20-0.50% Si, 0.5-0.9% Mn, 0.03% or less P, 0.02% or less S, 0.005-0.03% Nb, 0.3-0.6% Cr, 0.005-0.03% Ti, 0.1-0.35% Cu, 0.05-0.3% Ni, 0.01-0.15% Mo, 0.007% or less N, 0.001-0.006% Ca, 0.01-0.05% Al, and the balance Fe and other unavoidable impurities, the alloy elements satisfying the following relational formulas [Relational formula 1] 1.6?(Mo/96)/(P/31)?6, [Relational formula 2] 1.6?(Ca/S)?3, and [Relational formula 3] 3.5?(3*C/12+Mn/55)*100?5; wherein a microstructure comprises, by area fraction, 85% or more of polygonal ferrite and 15% or less of pearlite, the crystal grain size of the polygonal ferrite being 10 ?m or less; and wherein a variation in yield strength in a width direction is 35 MPa or lower.

Abstract: A Ni steel has a chemical composition within a predetermined range, in which a metallographic structure of a thickness middle portion contains 2.0 vol % to 20.0 vol % of an austenite phase, an average grain size of prior austenite grains is 3.0 ?m to 12.0 ?m, an average aspect ratio of the prior austenite grains is 2.6 to 10.0, a plate thickness is 4.5 mm to 20 mm, a yield stress at room temperature is 590 MPa to 710 MPa, and a tensile strength at the room temperature is 690 MPa to 810 MPa, when the plate thickness is more than 16 mm, the Ni steel contains Ni: 11.5% or more, and when the plate thickness is 16 mm or less and the Ni steel contains Ni: less than 11.5%, the average grain size of the prior austenite grains is 6.0 ?m or less.

Abstract: A nickel-containing steel for low temperature according to an aspect of the present invention has a chemical composition within a predetermined range, in which a metallographic structure of a thickness middle portion contains 2.0 vol % to 20.0 vol % of an austenite phase, an average grain size of prior austenite grains is 3.0 ?m to 15.0 ?m, an average aspect ratio of the prior austenite grains is 1.0 to 2.4, a plate thickness is 4.5 mm to 30 mm, the chemical composition and the average grain size of the prior austenite grains are further limited depending on the plate thickness, a yield stress at room temperature is 460 MPa to 710 MPa, and a tensile strength at the room temperature is 560 MPa to 810 MPa.

Abstract: Disclosed is a hot-rolled steel strip having a tensile strength greater than 875 MPa and containing in mass-%: C 0.06-0.12, Si 0-0.5, Mn 0.70-2.20, Nb 0.005-0.100, Ti 0.01-0.10, V 0.11-0.40, whereby the total amount of V+Nb+Ti is 0.20-0.40 Al 0.005-0.150, B 0-0.0008, Cr 0-1.0, whereby the total amount of Mn+Cr is 0.9-2.5, Mo 0-0.5, Cu 0-0.5, Ni 0-1.0, P 0-0.05, S 0-0.01, Zr 0-0.1 Co 0-0.1 W 0-0.1 Ca 0-0.005, N 0-0.01, balance Fe and unavoidable impurities, and having a microstructure at ¼ thickness that is: at least 90% martensite and bainite with island-shaped martensite-austenite (MA) constituents, the remainder being: less than 5% polygonal ferrite and quasi-polygonal ferrite, less than 5% pearlite, less than 5% austenite, so that the total area percentage is 100%.

Abstract: This coated steel member includes: a steel sheet substrate having a predetermined chemical composition; and a coating formed on a surface of the steel sheet substrate and containing Al and Fe, in which the coating has a low Al content region having an Al content of 3 mass % or more and less than 30 mass % and a high Al content region formed on a side closer to a surface than the low Al content region and having an Al content of 30 mass % or more, a maximum C content of the high Al content region is 25% or less of a C content of the steel sheet substrate, a maximum C content of the low Al content region is 40% or less of the C content of the steel sheet substrate, and a maximum C content in a range from an interface between the steel sheet substrate and the coating to a depth of 10 ?m on a side of the steel sheet substrate is 80% or less of the C content of the steel sheet substrate.

Abstract: The entirety or a part of this hot stamped product includes, as a chemical composition, by mass %, C: 0.001% or more and less than 0.080%, Si: 2.50% or less, Mn: 0.01% or more and less than 0.50%, P: 0.200% or less, S: 0.0200% or less, sol.Al: 0.001% to 2.500%, N: 0.0200% or less, Cr: 0.30% or more and less than 2.00%, and a remainder: Fe and impurities, in which a metallographic structure contains, by vol %, ferrite: more than 60.0%, martensite: 0% or more and less than 10.0%, and bainite: 0% or more and less than 20.0%, a tensile strength is less than 700 MPa, and ?TS, which is a decrease in the tensile strength after a heat treatment at 170° C. for 20 minutes, is 100 MPa or less.

Abstract: A timepiece component including a shaft-like portion including at least one pivot about a pivot axis, at least the material forming this shaft-like portion is a non-magnetic alloy containing at least silver and palladium and having a Vickers hardness of more than 450 HV.

Abstract: A grain-oriented electrical steel sheet according to the present invention includes a silicon steel sheet as a base steel sheet, and when an average value of amplitudes in a wavelength range of 20 to 100 ?m among wavelength components obtained by performing Fourier analysis on a measured cross-sectional curve parallel to a sheet width direction of the silicon steel sheet is set as ave-AMPC100, ave-AMPC100 is 0.0001 to 0.050 ?m.

Abstract: The present invention relates to steel sheet realizing both formability and weldability. The steel sheet of the present invention is characterized in that at a surface layer part of a region down to 30 ?m from the surface of the steel sheet in the sheet thickness direction, Si oxide grains are present in 3000 to 6000/mm2 in number density, an average of natural logarithms of the particle sizes of the Si oxide grains measured in ?m units is ?2.0 to ?1.2, the standard error of the natural logarithms of the particle sizes is 0.6 or less, and the number of Si oxide grains with deviations of the natural logarithms of the particle sizes from the average larger than 2 times the standard error is 5% or less of the total number of Si oxide grains and at a position of ½ of the thickness of the steel sheet, the number density of the Si oxide grains is 1000/mm2 or less.

Abstract: A steel plate plated with an aluminum-iron alloy for hot press forming can include a base steel sheet and an alloy plated layer formed on the base steel sheet. The alloy plated layer can include an alloyed layer (I) formed on the base steel sheet and containing, by weight, Al: 5-30%; an alloyed layer (II) formed on the alloyed layer (I) and containing, by weight, Al: 30-60%; and an alloyed layer (III) formed on the alloyed layer (II) and containing, by weight, Al: 20-50%. The alloy layer (II) can have a FeAl (Si) alloy phase dispersed and distributed therein, in which the FeAl (Si) alloy phase includes, by weight, Al: 20-50% and Si: 5-20%, and the number density of the FeAl (Si) alloy phase having a circle-equivalent diameter of 5 ?m or less 15 is 103/mm2 or more.

Abstract: The present disclosure relates to an aluminum member including a mother material containing aluminum or an aluminum alloy, and an anodic oxide film on the surface of the mother material. The anodic oxide film has a barrier layer on the surface of the mother material, and a porous layer on the barrier layer), and the BET specific surface area of the anodic oxide film is 0.1 to 10.0 m2/g.

Abstract: A refractory article including a body having central opening extending through at least a portion of the body, the central opening having a receiving surface having a convex curvature. In an embodiment, the body can include a coupling protrusion extending from a portion of an upper surface of the body and a coupling depression on a portion of a bottom surface of the body.

Abstract: Aluminium alloys suitable for etched and anodized components, in particular aluminum extrusion alloys of the types containing Magnesium and Silicon, which after being extruded to any wide variety of forms for different applications such as house buildings and other building applications is subjected to etching in a conventional alkaline etching bath and subsequent anodizing, wherein the relation between Cu and Zn is controlled to avoid preferential grain etching and the ratio of Cu/Zn is below 1.

Abstract: A stainless steel material including a base material made of ferritic stainless steel, a Cr oxide layer formed on a surface of the base material, and a spinel oxide layer formed on a surface of the Cr oxide layer, wherein a chemical composition of the base material satisfies [16.0?Cr+3×Mo?2.5×B?17×C?3?Si?35.0], a thickness of the Cr oxide layer (TCr) and a thickness of the spinel oxide layer (TS) satisfy [0.55?TCr/TS?6.7], the base material contains precipitate including one or more kinds selected from a M23C6, a M2B, a complex precipitate in which M2B acts as a precipitation nucleus, and M23C6 precipitates on a surface of the M2B, and a complex precipitate in which NbC acts as a precipitation nucleus, and M23C6 precipitates on a surface of the NbC, and a part of the precipitate protrude from the surface of the Cr oxide layer.

Abstract: The present invention provides a steel sheet plated with aluminum-iron and a preparation method therefor, the steel sheet comprising: a base steel sheet; and a plated layer formed on the surface of the base steel sheet and comprising: an alloyed layer containing at least one of Fe3Al, FeAl(Si), Fe2Al5, and FeAl3; and an aluminum layer formed on the alloyed layer and having a thickness less than 10% of that of the plated layer, wherein the plated layer is 20-35 ?m in thickness and contains 1-20 wt % of Mg as measured by GDS at a position 0.1 ?m deep from the surface of the plated layer and 10 wt % of oxygen as measured by GDS at a position 0.1 ?m deep from the surface of the plated layer.

Abstract: The present invention relates to an RFeB-based sintered magnet having a composition including: 24-31% by mass of at least one element selected from the group consisting of Nd, Pr, La and Ce; 0.1-6.5% by mass of at least one element selected from the group consisting of Dy and Tb; 0.8-1.4% by mass of B; 0.03-0.2% by mass of at least one element selected from the group consisting of Zr, Ti, Hf and Nb; 0.8-5.5% by mass of Co; 0.1-1.0% by mass of Cu; and 0.1-1.0% by mass of Al, with a remainder being Fe and unavoidable impurities, in which the composition has a total content of Cu and Al being higher than 0.5% by mass.

Abstract: A mounting structure is used, which includes: a semiconductor element including an element electrode; a metal member; and a sintered body configured to bond the semiconductor element and the metal member is used, in which the sintered body contains a first metal and a second metal solid-dissolved in the first metal, the second metal is a metal having a diffusion coefficient in the first metal larger than a self-diffusion coefficient of the first metal, and a content ratio of the second metal relative to a total mass of the first metal and the second metal in the sintered body is equal to or lower than a solid solution limit of the second metal to the first metal.

Abstract: A high-strength steel product is described that includes a composition consisting of, in terms of weight percentages, 0.02% to 0.05% C, 0.1% to 0.6% Si, 1.1% to 2.0% Mn, 0.01% to 0.15% Al, 0.01% to 0.08% Nb, 0.5% or less Cu, 0.5% or less Cr, 0.7% or less Ni, 0.03% or less Ti, 0.1% or less Mo, 0.1% or less V, 0.0005% or less B, 0.015% or less P, 0.005% or less S, and the remainder being Fe and inevitable impurities, wherein the steel product has a microstructure comprising a matrix consisting of, in terms of volume percentages, 40% to 80% quasi-polygonal ferrite, 20% to 40% polygonal ferrite, 20% or less bainite, and the remainder being pearlite and martensite of 20% or less.

Abstract: A flanged duct blank has a male part defined by lead notches formed at each side of a leading end and has a female part defined by trail notches formed at each side of a trailing end. The male part includes a lock tab. The female part includes a leg part and a Z-bend. The Z-bend includes a leg part and a gap. The duct blank is repeatedly clamped and bent by a pivoting wiper to form a duct portion. The pivoting wiper includes a clench tool that has a retractable rib and a retractable roller. With the lock tab inserted into the Z-bend and the retractable rib engaged with the Z-bend, the retractable roller clenches the leg part over the lock tab to lock the male and female parts together in a duct seam.

Abstract: A cross contains a sacred utensil or a wishing note and includes a transverse frame parallel with the ground, a first longitudinal frame perpendicular to the center part of the transverse frame, a first containing portion formed at the inner center of the first longitudinal frame from the lower surface of the first longitudinal frame toward the transverse and a first coupling member containing portion formed from the lower surface of the first longitudinal frame toward the outside of the first containing portion. A first frame magnet is contained in the first coupling member containing portion. A second longitudinal frame makes surface contact with the lower surface of the first longitudinal frame to be coupled thereto. A contained object support rack at the center part of the upper surface of the second longitudinal frame is positioned to correspond to the first containing portion of the first longitudinal frame.