Abstract: Steel weld metal compositions can include from 9.00 to 12.00 wt % chromium, from 0.02 to 0.06 wt % carbon, from 0.3 to 0.7 wt % manganese, from 0.1 to 0.3 wt % silicon, from 0.5 to 1.2 wt % nickel, from 0.1 to 0.5 wt % molybdenum, from 1.0 to 1.5 wt % cobalt, from 0.03 to 0.08 wt % niobium, from 0.2 to 0.8 wt % tungsten, from 0.3 to 0.8 wt % copper, from 0.005 to 0.010 wt % boron, and from 0.005 to 0.025 wt % nitrogen; wherein the balance of the steel weld metal composition is iron and unavoidable impurities. Methods of depositing the steel weld metal compositions on a workpiece by an electric arc welding process are also described without the use of a post weld heat treatment. Consumable electric arc welding electrodes producing high chromium creep resistant steel weld metal compositions are also described.

Abstract: Steel weld metal compositions can include from 10.75 to 12.00 wt % chromium, from 0.09 to 0.13 wt % carbon, from 0.2 to 0.5 wt % manganese, from 0.1 to 0.3 wt % silicon, from 0.2 to 0.7 wt % nickel, from 0.1 to 0.5 wt % molybdenum, from 0.8 to 1.2 wt % cobalt, from 0.03 to 0.08 wt % niobium, from 0.8 to 1.2 wt % tungsten, from 0.3 to 0.8 wt % copper, from 0.10 to 0.15 wt % vanadium, from 0.01 to 0.05 wt % titanium, from 0.005 to 0.010 wt % boron, from 0.005 to 0.015 wt % nitrogen; wherein the balance of the steel weld metal composition is iron and unavoidable impurities. Methods of depositing the steel weld metal compositions on a workpiece by an electric arc welding process are also described. Consumable electric arc welding electrodes producing high chromium creep resistant steel weld metal compositions are also described.

Abstract: A ceramic matrix composite (CMC) material component is provided that includes a CMC material and an environmental barrier coating (EBC). The CMC material includes first fibers, a matrix, and at least one coefficient of thermal expansion (CTE) increasing additive. The first fibers include a first material having a first CTE value. The matrix includes a second material having a second CTE value. The at least one CTE increasing additive has a third CTE value. The EBC is disposed on at least one exposed surface of the CMC material and has a fourth CTE value. The third CTE value is greater than the first CTE value and the second CTE value, and the at least one CTE increasing additive is present within the CMC material in an amount that elevates a CTE value of the CMC material above the first CTE value or the second CTE value.

Abstract: A railway wheel having, in mass %, C: 0.80 to 1.15%, Si: 1.00% or less, Mn: 0.10 to 1.25%, P: 0.050% or less, S: 0.030% or less, Al: 0.025 to 0.650%, N: 0.0030 to 0.0200%, Cr: 0 to 0.60%, and V: 0 to 0.12%, with the balance being Fe and impurities. The railway wheel has a hub part, a rim part including a tread and a flange, and a web part disposed between the hub part and the rim part. The area fraction of pearlite in the hub, web, and rim parts is 95% or more, and the amount of pro-eutectoid cementite is not more than 1.0 pieces/100 ?m. The amount of pro-eutectoid cementite is calculated as (pieces/100 ?m)=a total sum of the number of pieces of pro-eutectoid cementite which intersect with two diagonal lines in a square visual field of 200 ?m×200 ?m/(5.66×100 ?m).

Abstract: Steel sheets and methods for manufacturing same useful for a line pipe or the like can have excellent hydrogen induced cracking resistance, and longitudinal strength uniformity. The Sttel sheets can include certain amounts of carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), aluminum (Al), nitrogen (N), niobium (Nb), titanium (Ti), calcium (Ca), one or more selected from a group consisting of nickel (Ni), chromium (Cr), molybdenum (Mo), vanadium (V), and a balance of iron (Fe) and other inevitable impurities. A microstructure of the steel sheet can be comprised of ferrite or a composite structure of ferrite and acicular ferrite, and upper bainite is included in an area of 5% or less in a center portion of the thickness of the steel sheet.

Abstract: A ferritic stainless steel for an exhaust system heat exchanger having excellent sound absorption properties and a method for manufacturing the same are disclosed. The ferritic stainless steel for an exhaust system heat exchanger having excellent sound absorption properties includes, by weight percent, 0.001 to 0.01% of C, 0.001 to 0.01% of N, 0.2 to 1% of Si, 0.1 to 2% of Mn, 10 to 30% of Cr, 0.001 to 0.1% of Ti, 0.001 to 0.015% of Al, 0.3 to 0.6% of Nb, 0.01 to 2.5% of Mo, and the balance of Fe and other unavoidable impurities, wherein the number of inclusions existing in a ferrite matrix and satisfying the following Formula 1 is 5 ea/mm2 or more.

Abstract: An Sm—Fe—N magnet material includes from 7.0 at % to 12 at % of Sm, from 0.1 at % to 1.5 at % of at least one element selected from the group consisting of Hf and Zr, from 0.05 at % to 0.5 at % of C, from 10 at % to 20 at % of N, and from 0 at % to 35 at % of Co, with a remainder being Fe and unavoidable impurities.

Abstract: A high strength steel strip having medium amounts of C, Mn, Si, Cr and Al, wherein the steel strip has a microstructure consisting of, in vol. %: ferrite and bainite together 50-90%, martensite<15%, retained austenite 5-15%, the remainder being pearlite, cementite, precipitates and inclusions together up to 5%.

Abstract: A coating includes a first base layer including a nitride of at least Al and Cr, a second base layer including a nitride of at least Al and Cr overlying the first base layer, and an outermost indicator layer overlying the second base layer. The first base layer has a positive residual compressive stress gradient. The second base layer has substantially constant residual compressive stresses. The outermost indicator layer includes a nitride of Si and Me, wherein Me is at least one of Ti, Zr, Hf, and Cr. The outermost indicator layer has residual compressive stresses that are less than the residual compressive stresses of the second base layer.

Abstract: In one aspect, refractory coatings are described herein having multiple cubic phases. In some embodiments, a coating comprises a refractory layer of TiAlN deposited by PVD adhered to the substrate, the refractory layer comprising a cubic TiAlN phase and a cubic A1N phase, wherein a ratio of intensity in the X-ray diffractogram (XRD) of a (200) reflection of the cubic AlN phase to intensity of a (200) reflection of the cubic TiAlN phase, I(200)/I(200), is at least 0.5.

Abstract: A hot-stamped article and method of manufacturing same use a tailor welded blank (TWB) method capable of controlling the microstructure of a weld portion to prevent fracture of the weld portion. The hot-stamped article is manufactured by welding a first sheet and a second sheet made of different kinds of materials to each other using the TWB method and hot-stamping a welded sheet. The first sheet and the second sheet have different upper austenite transformation temperatures (A3 temperatures), the first sheet and the second sheet are welded to each other via a weld portion, each of the first sheet and the weld portion has a composite structure comprising ferrite, bainite, and martensite, and the second sheet has a martensite structure.

Abstract: A press hardened coated steel part with high resistance to delayed fracture, the coating containing (Fex—Aly) intermetallic compounds resulting from the diffusion of iron into an aluminum or an aluminum-based alloy, or an aluminum alloy of a precoating, wherein the chemical composition of the steel includes, in weight: 0.16%?C?0.42%, 0.1%?Mn?3%, 0.07%?Si?1.60%, 0.002%?Al?0.070%, 0.02%?Cr?1.0%, 0.0005?B?0.005%, 0.002%?Mg?0.007%, 0.002%?Ti?0.11%, 0.0008%?O?0.005%, wherein (Ti)×(O)2×107?2, 0.001%?N?0.007%, 0.001%?S?0.005%, 0.001%?P?0.025% and optionally one or more elements selected from the list of: 0.005%?Ni?0.23%, 0.005%?Nb?0.060%, the remainder being Fe and unavoidable impurities, and wherein the microstructure includes at least 95% martensite.

Abstract: A hot stamped article having excellent shock absorption having a predetermined chemical composition, having a microstructure containing prior austenite having an average grain size of 3 ?m or less and further containing at least one of lower bainite, martensite, and tempered martensite in an area ratio of 90% or more, and having a grain boundary solid solution ratio Z defined by Z=(mass % of one or both of Nb and Mo at grain boundaries)/(mass % of one or both of Nb and Mo at time of melting) of 0.3 or more.

Abstract: An essentially lead free steel having improved machinability while reducing or eliminating lead (except for trace impurities) and without detriment of the material properties of the steel. The properties of the lead free steel are dependent on both the composition and method of manufacture. The improved lead free steel has, in percent by weight (wt-%): Carbon: 0.39-0.43%; Manganese: 0.75-1.00%; Silicon: 0.15-0.35%; Chromium: 0.80-1.05%; Molybdenum: 0.15-0.25%; at least one of Tellurium: 0.003-0.090 wt-%, Selenium: 0.080-0.2 wt-%, Sulfur: 0.065-0.09% wt-%, and Bismuth: 0.03-0.1 wt-%; and the balance being Fe and normally occurring scrap steel impurities. The hot-rolled lead-free steel product is subjected to a heat treatment at a first temperature for a first duration, at a second temperature for a second duration that is less than the first temperature, at a third temperature for a third time period that is greater than the second temperature, and subsequently cooling the steel product.

Abstract: Special usage steels, particularly those intended to be in contact with combustion fumes, are described. Tubular components produced based on such steels are also described. The steel both is resistant to the coking phenomenon and has improved mechanical performances. The steel contains in percentage by weight from 0.08 to 0.15% carbon, from 0.4 to 0.8% manganese, from 1.5 to 2.5% silicon, from 0.5 to 2% copper, from 8 to 10% chrome, from 0.5 to 3% nickel, from 0.01 to 0.07% nitrogen, from 0.8 to 1.1% molybdenum, with the remainder being iron and impurities.

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: A layered stack that can be used as an oxidation and chemical barrier with superalloy substrates, including Ni, Ni—Co, Co, and Ni-aluminide based substrates, and methods of preparing the layered stack. The layer system can be applied to a substrate in a single physical vapor deposition process with no interruption of vacuum conditions.

Abstract: The iron alloy particle is a particle including an iron alloy. The particle includes multiple mixed-phase particles, each including nanocrystals of 10 nm or more and 100 nm or less (i.e., from 10 nm to 100 nm) in crystallite size and an amorphous phase; and a grain boundary layer between the mixed-phase particles. Also, the iron alloy has a composition containing Fe, Si, P, B, C, and Cu.

Abstract: A surface-coated cutting tool according to the present invention includes a tool body and a hard coating layer including a complex carbonitride layer containing a small amount of chlorine and (Ti(1-x)ZrxyHfx(1-y))(N(1-z)Cz) (0.10?x?0.90, 0<y?1.0, 0.08<z<0.60), a ZrHf and C content ratios in cycles, a cycle distance between a maximum ZrHf content point and an adjacent minimum ZrHf content point and a cycle distance between a maximum C content point and an adjacent minimum C content point are 5 to 100 nm, an average value of content ratio differences ?x and ?z is 0.02 or more, a distance between the maximum ZrHf content point and the maximum C content point is ? or less of the distance between a maximum content point and a minimum content point of adjacent ZrHf components, and a composition fluctuation structure is 10% or more.

Abstract: A Ni-plated steel sheet according to an aspect of the present invention includes: a base steel sheet; an Fe—Ni diffusion alloy region disposed on the base steel sheet; and a Ni plating region disposed on the Fe—Ni diffusion alloy region, in which an average equivalent circle diameter of crystal grains made of Ni (fcc) in the Ni plating region measured in a cross section perpendicular to a rolled surface of the base steel sheet is 0.2 to 4.0 ?m.