There is provided a hot-stamped body including: a steel base metal; and a metallic layer formed on a surface of the steel base metal, wherein the metallic layer includes: an interface layer that contains, in mass %, Al: 30.0 to 36.0%, has a thickness of 100 nm to 15 m, and is located in an interface between the metallic layer and the steel base metal; and a principal layer that includes coexisting Zn phases and insular FeAl.sub.2 phases, is located on the interface layer, and has a thickness of 1 m to 40 m. This hot-stamped body is excellent in fatigue properties, corrosion resistance, and chipping resistance.

There is provided a hot-stamped body including: a steel base metal; and a metallic layer formed on a surface of the steel base metal, wherein the metallic layer includes: an interface layer that contains, in mass %, Al: 30.0 to 36.0%, has a thickness of 100 nm to 5 m, and is located in an interface between the metallic layer and the steel base metal; and a principal layer that includes coexisting MgZn.sub.2 phases and insular FeAl.sub.2 phases, is located on the interface layer, and has a thickness of 3 m to 40 m.

Provided is a plated steel sheet for hot press forming, having an excellent impact property, including: a base steel sheet comprising, by wt %, 0.15-0.4% of C, 0.05-1.0% of Si, 0.6-3.0% of Mn, 0.001-0.05% of P, 0.0001-0.02% of S, 0.01-0.1% of Al, 0.001-0.02% of N, 0.001-0.01% of B, 0.01-0.5% of Cr, 0.01-0.05% of Ti, and the balance of Fe and inevitable impurities; and an AlSi plated layer formed on the surface of the base steel sheet. A thickness of a carbon-depleted layer in a surface layer part of the base steel sheet is 5 m or less. The surface layer part means a region from the surface of the base steel sheet to a depth of 200 m, and the carbon-depleted layer means a region which the carbon content is 50% or less of an average carbon amount (C.sub.0) of the base steel sheet.

A ZnAlMg-based plated steel sheet has, an alloy layer formed on a surface of a steel sheet and contains Fe and Si, and a plated layer formed on a surface of the alloy layer opposite to the steel sheet, in which the plated layer and the alloy layer include, in mass %, Al: 45.0 to 65.0%, Si: 0.50 to 5.00%, Mg: 1.00 to 10.00%, and a balance of Zn, Fe, and impurities, the plated layer contains 0.1 to 20.0% of a MgSi phase in terms of volume fraction, an average equivalent circle diameter of the MgSi phase in the surface layer area is 0.1 to 15.0 m, and an integrated value of a Si content from the surface to thickness center of the plated layer is 0.55 times or more of an integrated value of the Si content from the surface to an interface.

Provided are a high-strength galvanized hot-rolled steel sheet and a method for manufacturing the steel sheet. A steel sheet has a chemical composition, and a galvanized layer is disposed on the steel sheet. The chemical composition includes, in mass %, C: 0.02% or greater and 0.30% or less, Si: 0.01% or greater and 2.5% or less, Mn: 0.3% or greater and 3.0% or less, P: 0.08% or less, S: 0.02% or less, and Al: 0.001% or greater and 0.20% or less. The galvanized layer has a coating weight per side of 20 to 120 g/m.sup.2. A surface of the steel sheet has a specific surface area ratio, r, of 2.5 or less, and an amount of Si present in the galvanized layer and an amount of Mn present in the galvanized layer respectively satisfy: amount of Sir0.06, and amount of Mnr0.10.

Provided is a sliding member capable of realizing the wear resistance effect by Si particles. The sliding member includes an aluminum alloy layer containing 7.0% by mass or more and 13.0% by mass or less of Sn, 6.5% by mass or more and 12.0% by mass or less of Si, 0.5% by mass or more and 3.0% by mass or less of Cu, unavoidable impurities, and a balance Al. Si particles are dispersed in the aluminum alloy layer. A Vickers hardness of a matrix of the aluminum alloy layer is 40 HV or more and 60 HV or less. A load resistance value, which is a product of a volume concentration and average area of the Si particles and the Vickers hardness of the matrix, is 0.00001 N or more and 0.00029 N or less.

An aluminium-zinc-hot-dipped and colour-coated steel plate having a 600 MPa yield strength grade and a high elongation and a manufacturing method thereof, with the chemical components in mass percentage of a substrate of the steel plate being: 0.07-0.15% of C, 0.02-0.5% of Si, 1.3-1.8% of Mn, N0.004%, S0.01%, Ti0.20%, Nb0.060%, and the balance being Fe and other inevitable impurities, and meanwhile satisfying the conditions of: (C+Mn/6)0.3%; Mn/S150; Nb satisfying 0.01%(Nb0.22C1.1N)0.06% where no Ti is contained; Ti satisfying 0.5Ti/C1.5 where no Nb is contained; and 0.04%(Ti+Nb)0.26% where Ti and Nb are added in combination. The steel plate has a yield strength of 600 MPa, a tensile strength of 650 MPa, an elongation after fracture of 12%, a good strength and toughness and an excellent corrosion resistance.

Provided herein is a plated steel sheet having a yield ratio, strength (tensile strength), elongation, hole expansibility, and CTS. A method for producing the plated steel sheet is also provided, among others. A steel sheet of a specific composition is provided that has a micro structure containing 70 to 90% of ferrite, 5 to 20% of martensite, 5% or less of retained austenite, 10% or less of bainite, and 5% or less of perlite by volume. The ferrite has an average crystal grain diameter of 20 m or less. The martensite has an average crystal grain diameter of 5 m or less. The retained austenite has an average crystal grain diameter of 5 m or less. The bainite has an average crystal grain diameter of 7 m or less. The steel sheet has a tensile strength of 590 MPa or more.

Wear resistant articles are described herein which, in some embodiments, mitigate CTE differences between wear resistant components and metallic substrates. In one aspect, an article comprises a layer of sintered cemented carbide bonded to a layer of iron-based alloy via a metal-matrix composite bonding layer, wherein coefficients of thermal expansion (CTE) of the sintered cemented carbide layer, metal matrix composite bonding layer, and iron-based alloy layer satisfy the relation:

[00001]$x=\frac{\left(.Math.C.Math..Math.T.Math..Math.E.Math..Math.\mathrm{WC}-C.Math..Math.T.Math..Math.E.Math..Math.M.Math..Math.M.Math..Math.C.Math.\right)}{\left(.Math.C.Math..Math.T.Math..Math.E.Math..Math.M.Math..Math.M.Math..Math.C-C.Math..Math.T.Math..Math.E.Math..Math.\mathrm{Fe}.Math.\right)}$

wherein 0.5x2 and CTE WC, CTE MMC and CTE Fe are the CTE values for the sintered cemented carbide, metal matrix composite, and iron-based a

A plated steel material includes a plated layer containing, by wt %: 0.5 to 14% of Al, 0.5 to 5% of Mg, and the balance being Zn and inevitable impurities. The plated steel material satisfies the following Equation: ([Mg].sub.S[Mg].sub.1/2)/[Mg].sub.1/20.3. [Mg].sub.S means a content (wt %) of Mg in a surface of the plated layer, and [Mg].sub.1/2 means a content (wt %) of Mg at a t position (t represents a thickness of the plated layer) from the surface of the plated layer in a thickness direction.