A titanium product includes an inner layer portion and a surface layer portion joined to the inner layer portion. The surface layer portion has a composition consisting of, by mass %, O: 0.4% or less, Fe: 0.5% or less, Cl: 0.020% or less, the balance: Ti and impurities. The inner layer portion 3 has pores and a composition consisting of, by mass %, O: 0.4% or less, Fe: 0.5% or less, Cl: more than 0.020% and 0.60%, the balance: Ti and impurities. The area fraction of the pores in the inner layer portion in a cross-section perpendicular to the longitudinal direction of the titanium product is more than 0% and not more than 30%. The Cl content (Cl.sub.I) of the inner layer portion, a thickness (t.sub.S) of the surface layer portion, and a thickness (t.sub.I) of the inner layer portion satisfy the expression [Cl.sub.I≤0.03+0.02×t.sub.S/t.sub.I].

A titanium product includes an inner layer portion and a surface layer portion joined to the inner layer portion. The surface layer portion has a composition consisting of, by mass %, O: 0.4% or less, Fe: 0.5% or less, Cl: 0.020% or less, the balance: Ti and impurities. The inner layer portion 3 has pores and a composition consisting of, by mass %, O: 0.4% or less, Fe: 0.5% or less, Cl: more than 0.020% and 0.60%, the balance: Ti and impurities. The area fraction of the pores in the inner layer portion in a cross-section perpendicular to the longitudinal direction of the titanium product is more than 0% and not more than 30%. The Cl content (Cl.sub.I) of the inner layer portion, a thickness (t.sub.S) of the surface layer portion, and a thickness (t.sub.I) of the inner layer portion satisfy the expression [Cl.sub.I≤0.03+0.02×t.sub.S/t.sub.I].

A cover plate is configured to be releasably connected to a concealed fire protection sprinkler to conceal the fire protection sprinkler. The cover plate includes a first layer of metal on a first side of the cover plate, the first side of the cover plate having the first layer of metal directly facing, in its entirety, the concealed fire protection sprinkler, and a second layer of metal on a second side of the cover plate, the second side being opposite to the first side. The second layer of metal is more resistant to corrosion than the first layer, and is bonded to the first layer. In addition, the first layer of metal facing the concealed fire protection sprinkler is more thermally conductive than is the second layer.

A cover plate is configured to be releasably connected to a concealed fire protection sprinkler to conceal the fire protection sprinkler. The cover plate includes a first layer of metal on a first side of the cover plate, the first side of the cover plate having the first layer of metal directly facing, in its entirety, the concealed fire protection sprinkler, and a second layer of metal on a second side of the cover plate, the second side being opposite to the first side. The second layer of metal is more resistant to corrosion than the first layer, and is bonded to the first layer. In addition, the first layer of metal facing the concealed fire protection sprinkler is more thermally conductive than is the second layer.

Provided is a plated steel sheet applicable for various purposes as in construction materials, household electric appliances, automobiles, etc. and, more particularly, to a hot dip plated steel sheet having excellent corrosion resistance and workability and a manufacturing method therefor.

Provided is a plated steel sheet applicable for various purposes as in construction materials, household electric appliances, automobiles, etc. and, more particularly, to a hot dip plated steel sheet having excellent corrosion resistance and workability and a manufacturing method therefor.

The disclosed process is capable of depositing thin layers of a wide variety of metals onto powders of magnesium, aluminum, and their alloys. A material is provided that comprises particles containing a reactive metal coated with a noble metal that has a less-negative standard reduction potential than the reactive metal. The coating has a thickness from 1 nanometer to 100 microns, for example. A method of forming an immersion deposit on a reactive metal comprises: combining a reactive metal, an ionic liquid, and a noble metal salt; depositing the noble metal on the reactive metal by a surface-displacement reaction, thereby generating the immersion deposit on the reactive metal; and removing the ionic liquid from the immersion deposit. The material may be present in an article or object (e.g., a sintered part) containing from 0.25 wt % to 100 wt % of a coated reactive metal as disclosed herein.

The disclosed process is capable of depositing thin layers of a wide variety of metals onto powders of magnesium, aluminum, and their alloys. A material is provided that comprises particles containing a reactive metal coated with a noble metal that has a less-negative standard reduction potential than the reactive metal. The coating has a thickness from 1 nanometer to 100 microns, for example. A method of forming an immersion deposit on a reactive metal comprises: combining a reactive metal, an ionic liquid, and a noble metal salt; depositing the noble metal on the reactive metal by a surface-displacement reaction, thereby generating the immersion deposit on the reactive metal; and removing the ionic liquid from the immersion deposit. The material may be present in an article or object (e.g., a sintered part) containing from 0.25 wt % to 100 wt % of a coated reactive metal as disclosed herein.

Disclosed is a multi-layer rolled composite board, comprising a transition layer provided between two adjacent composite layers, wherein the transition layer is an anisotropic steel sheet. Also disclosed is a manufacturing method for the multi-layer rolled composite board, the method comprising the following steps: (1) providing a transition layer between adjacent composite layers to assemble a blank, and creating a vacuum between the layers; and (2) performing composite rolling, comprising: heating the blank to 1100-1260° C. and maintaining the temperature for 0.6 h or above, then performing hot rolling at a temperature of Ar3 or above, with the final rolling temperature being controlled to be higher than 820° C., cooling at a speed of 30-100° C./s after rolling, and then coiling, with the coiling temperature being controlled to be 20-750° C. The multi-layer rolled composite board of the present invention can be greatly transformed according to different compositions and processes so as to achieve different strength grades ranging from 150 MPa to 1700 MPa, thereby providing the basis for different specific mechanical properties for the whole steel sheet.

Provided is a multimaterial joint material that contributes to multimaterialization and a reduction in weight of a transport apparatus, the multimaterial joint material being configured from: a flame-retardant magnesium alloy; and a metal or alloy selected from the group consisting of aluminum alloys, titanium alloys, stainless steel, and steel. This multimaterial joint material is such that two or more layers of different types of metal materials are joined, wherein the multimaterial joint material is characterized in that: of the two or more layers of metal materials, at least one layer comprises a flame-retardant magnesium alloy, and another layer comprises a metal or alloy selected from the group consisting of aluminum alloys, titanium alloys, stainless steel, and steel; and the two or more layers of metal materials are joined together across the entire surface of joining surfaces that overlap each other.