Abstract:
A hot-pressed member includes a steel sheet, a Ni-diffusion region present in a surface layer of the steel sheet, and an intermetallic compound layer and a ZnO layer which are provided in order on the Ni-diffusion region, the intermetallic compound layer corresponding to a γ phase present in a phase equilibrium diagram of a Zn—Ni alloy, wherein a spontaneous immersion potential indicated in a 0.5 M NaCl aqueous air-saturated solution at 25° C.±5° C. is −600 to −360 mV based on a standard hydrogen electrode.
Abstract:
Disclosed is a phosphated galvanized steel sheet comprising a steel sheet, a zinc-plating layer of η single phase which is formed on at least one side of the steel sheet and contains Ni in an amount of not less than 10 ppm by mass and not more than the solubility limit thereof, and a phosphate layer which is formed on the zinc-plating layer and contains Mg in an amount of not less than 0.1 % by mass and less than 2.0 % by mass. Although this steel sheet is not subjected to sealing, it has corrosion resistance equivalent to or higher than those of conventional steel sheets which have been subjected to sealing, while having excellent blackening resistance.
Abstract:
The invention provides methods for manufacturing warm press-formed members which can ensure post-coating corrosion resistance. A method for manufacturing warm press-formed members includes heating a steel sheet to a temperature in the range from 200 to 800° C. and warm press-forming the steel sheet at a temperature in the above range of temperatures, the steel sheet having a Zn—Ni alloy coating layer on its surface, the coating layer including 10 to 25 mass % Ni and the balance being Zn and inevitable impurities and having a coating weight of 10 to 90 g/m2.
Abstract:
A hot-pressed member includes a steel sheet, a Ni-diffusion region present in a surface layer of the steel sheet, and an intermetallic compound layer and a ZnO layer which are provided in order on the Ni-diffusion region, the intermetallic compound layer corresponding to a γ phase present in a phase equilibrium diagram of a Zn—Ni alloy, wherein a spontaneous immersion potential indicated in a 0.5 M NaCl aqueous air-saturated solution at 25° C.±5° C. is −600 to −360 mV based on a standard hydrogen electrode.
Abstract:
There is provided a hot-dip Al—Zn coated steel sheet that has a steel sheet containing Si and Mn as a base steel sheet and has excellent coating appearance and corrosion resistance. The Al—Zn coating layer has an Al content in the range of 20% to 95% by mass. The Al—Zn coating layer has a Ca content in the range of 0.01% to 10% by mass. Alternatively, the Ca and Mg content is in the range of 0.01% to 10% by mass. A steel sheet surface layer within 100 μm from a surface of the base steel sheet directly under the Al—Zn coating layer contains 0.06 to 1.0 g/m2 per surface of an oxide of at least one selected from Fe, Si, Mn, Al, P, B, Nb, Ti, Cr, Mo, Cu, and Ni in total.
Abstract translation:提供了一种热浸镀铝锌钢板,其具有含有Si和Mn作为基础钢板的钢板,并且具有优异的涂层外观和耐腐蚀性。 Al-Zn涂层的Al含量在20质量%至95质量%的范围内。 Al-Zn系涂层的Ca含量为0.01质量%〜10质量%。 或者,Ca和Mg含量在0.01质量%至10质量%的范围内。 在从Al-Zn被覆层的正下方的基材钢板的表面100μm以下的钢板表面层,含有选自Fe,Si,Mn,Al中的至少一种以上的氧化物的表面0.06〜1.0g / m 2, P,B,Nb,Ti,Cr,Mo,Cu和Ni。
Abstract:
In order to provide a steel sheet for hot pressing from which a hot-pressed part excellent in perforation corrosion resistance is obtainable and a method of manufacturing a hot-pressed part using the steel sheet for hot pressing, provided is a steel sheet for hot pressing having, sequentially on a surface of a base steel sheet: a plating layer I containing 60% by mass or more of Ni and the remainder consisting of Zn and inevitable impurities, a coating mass thereof being 0.01 to 5 g/m2; and a plating layer II containing 10 to 25% by mass of Ni and the remainder consisting of Zn and inevitable impurities, a coating mass thereof being 10 to 90 g/m2.
Abstract translation:为了提供可获得耐穿孔性优异的热压部分的热压钢板和使用热压钢板制造热压部件的方法,提供一种用于热压的钢板 在基体钢板的表面上依次形成:含有60质量%以上的Ni的镀层I,其余由Zn和不可避免的杂质构成,其涂布质量为0.01〜5g / m 2; 和含有10〜25质量%的Ni,其余由Zn和不可避免的杂质构成的镀层II,其涂布质量为10〜90g / m 2。
Abstract:
There is provided a hot-dip Al—Zn coated steel sheet that has a steel sheet containing Si and Mn as a base steel sheet and has excellent coating appearance and corrosion resistance. The Al—Zn coating layer has an Al content in the range of 20% to 95% by mass. The Al—Zn coating layer has a Ca content in the range of 0.01% to 10% by mass. Alternatively, the Ca and Mg content is in the range of 0.01% to 10% by mass. A steel sheet surface layer within 100 μm from a surface of the base steel sheet directly under the Al—Zn coating layer contains less than 0.060 g/m2 per surface of an oxide of at least one selected from Fe, Si, Mn, Al, P, B, Nb, Ti, Cr, Mo, Cu, and Ni in total.
Abstract translation:提供了一种热浸镀铝锌钢板,其具有含有Si和Mn作为基础钢板的钢板,并且具有优异的涂层外观和耐腐蚀性。 Al-Zn涂层的Al含量在20质量%至95质量%的范围内。 Al-Zn系涂层的Ca含量为0.01质量%〜10质量%。 或者,Ca和Mg含量在0.01质量%至10质量%的范围内。 从Al-Zn被覆层的正下方的基材钢板的表面100μm以内的钢板表面层,含有选自Fe,Si,Mn,Al中的至少一种以上的氧化物表面的0.060g / m 2以下, P,B,Nb,Ti,Cr,Mo,Cu和Ni。
Abstract:
The phosphate-treated zinc-coated steel sheet has: a steel sheet; a zinc-coating layer of a single η-phase containing Ni in a range from 10 ppm by mass to solid solution limit, being formed on at least one side of the steel sheet; and a phosphate-treated layer containing Mg in a range from not less than 0.1% by mass to less than 2.0% by mass, being formed on the zinc-coating layer. The steel sheet without treated by sealing has corrosion resistance equivalent to or higher than that of conventional products treated by sealing, and also has excellent blackening resistance.
Abstract:
The invention provides a remediation method of soil, water and/or gases by prompt dehalogenation of halogenated hydrocarbons by allowing the halogenated hydrocarbons contained at least in one of the soil, water and/or gases to contact an iron powder containing about 0.03 to about 2% by mass of sulfur preferably on the surface, and an iron powder for use in the remediation method.
Abstract:
There is provided a hot-dip Al—Zn coated steel sheet that has a steel sheet containing Si and Mn as a base steel sheet and has excellent coating appearance and corrosion resistance. The Al—Zn coating layer has an Al content in the range of 20% to 95% by mass. The Al—Zn coating layer has a Ca content in the range of 0.01% to 10% by mass. Alternatively, the Ca and Mg content is in the range of 0.01% to 10% by mass. A steel sheet surface layer within 100 μm from a surface of the base steel sheet directly under the Al—Zn coating layer contains less than 0.060 g/m2 per surface of an oxide of at least one selected from Fe, Si, Mn, Al, P, B, Nb, Ti, Cr, Mo, Cu, and Ni in total.