摘要:
Provided is a chemical treatment steel sheet including a steel sheet; a composite coated layer which is formed on at least one surface of the steel sheet, and contains 2 to 200 mg/m 2 of Ni in terms of an amount of metal Ni and 0.1 to 10 g/m 2 of Sn in terms of an amount of metal Sn, and in which an island-shaped Sn coated layer is formed on an Fe-Ni-Sn alloy layer; and a chemical treatment layer that is formed on the composite coated layer, and contains a 0.01 to 0.1 mg/m 2 of Zr compounds in terms of an amount of metal Zr and 0.01 to 5 mg/m 2 of phosphate compounds in terms of an amount of P.
摘要翻译:提供一种包含钢板的化学处理钢板; 在该钢板的至少一个表面上形成的复合覆盖层,并且以金属Ni的量计,含有2至200mg / m 2的Ni和0.1至10g / m 2的Sn 金属Sn,并且其中在Fe-Ni-Sn合金层上形成岛状Sn涂层; 以及形成在所述复合涂层上的化学处理层,并且以金属Zr的量计含有0.01至0.1mg / m 2的Zr化合物,并且含有0.01至5mg / m 2的磷酸盐化合物 P.
摘要:
Provided is a high-strength galvanized steel sheet excellent in the coating adhesion and coating appearance of a worked portion. The high-strength galvanized steel sheet includes a cold-rolled steel sheet which has a specific composition and a microstructure having a martensite area ratio of 7% or more and less than 25% and a ferrite area ratio of 50% or more and which includes a base metal surface portion in which the amount of internal oxides per single side is 0.05 g/m 2 or less; an intermetallic compound, formed on the cold-rolled steel sheet, containing Al of 0.12 g/m 2 or more and 0.22 g/m 2 or less and Fe 2 Al 5 with an average grain size of less than 1.0 µm; and a galvanizing layer formed on the intermetallic compound. The galvanizing layer contains 0.3% ≤ Al% ≤ 0.6% (Al% represents the content (mass percent) of Al in the galvanizing layer) and has a surface roughness Ra of 0.8 µm or more and 1.6 µm or less and a glossiness (G value) of 550 or more and 750 or less. In the galvanizing layer, the zinc basal plane orientation ratio Zn (002)/(004) is 60% or more and 90% or less.
摘要翻译:本发明提供一种加工部的涂装密合性和涂装外观优异的高强度热镀锌钢板。 高强度热镀锌钢板包含具有特定组成和具有马氏体面积率为7%以上且小于25%且铁素体面积率为50%以上的组织的冷轧钢板,其包含 其中每单面内部氧化物的量为0.05g / m 2或更小的基体金属表面部分; 在所述冷轧钢板上形成的含有0.12g / m 2以上且0.22g / m 2以下的Al和平均结晶粒径小于1.0μm的Fe 2 Al 5的金属间化合物; 以及在金属间化合物上形成的镀锌层。 镀层包含0.3%≤Al%≤0.6%(Al%表示镀层中Al的含量(质量百分比))并且具有0.8μm以上且1.6μm以下的表面粗糙度Ra和光泽度(G 值)为550以上且750以下。 在镀锌层中,锌基面取向比Zn(002)/(004)为60%以上且90%以下。
摘要:
Weld deposit compositions with improved abrasion and corrosion resistance are provided by balancing percent weights of Chromium (Cr), Titanium (Ti), Niobium (Nb), and Boron (B) to allow the Chromium content of the weld matrix to be minimally reduced during carbide formation. The result is an enriched Chromium matrix that has excellent corrosion resistance in combination with highly abrasion resistant dispersed carbides.
摘要:
There is provided a high-strength thick-walled electric resistance welded steel pipe having excellent low-temperature toughness and excellent HIC resistance and having a yield strength of 400 MPa or more. Steel is heated to and held at a temperature in the range of 1200°C to 1280°C. The steel has a chemical composition consisting of C: 0.025% to 0.084%, Si: 0.10% to 0.30%, Mn: 0.70% to 1.80%, controlled amounts of P, S, Al, N, and O, Nb: 0.001% to 0.065%, V: 0.001% to 0.065%, Ti: 0.001% to 0.033%, and Ca: 0.0001% to 0.0035% on a mass percent basis and the remainder being Fe and incidental impurities, and satisfies Pcm of 0.20 or less. The steel is hot-rolled at a rolling reduction of 20% or more in an unrecrystallization temperature range. After the completion of the hot-rolling, the steel is cooled to a finish cooling temperature of 630°C or less at a cooling rate in the range of 7°C/s to 49°C/s and is coiled at 400°C or more and less than 600°C to form a hot-rolled steel strip. The hot-rolled steel strip is subjected to roll-forming and electric resistance welding to produce an electric resistance welded steel pipe. The welded portion of the electric resistance welded steel pipe is then subjected to a heat treatment in which the welded portion is heated to a temperature in the range of 800°C to 1150°C over the total wall thickness and is then cooled to 630°C or less at an average cooling rate in the range of 7°C/s to 49°C/s. The base steel portion and the electric resistance welded portion of the resulting high-strength thick-walled electric resistance welded steel pipe have excellent low-temperature toughness and excellent HIC resistance.
摘要:
The present invention provides a carrier-attached copper foil, wherein an ultrathin copper foil is not peeled from the carrier prior to the lamination to an insulating substrate, but can be peeled from the carrier after the lamination to the insulating substrate. A carrier-attached copper foil comprising a copper foil carrier, an intermediate layer laminated on the copper foil carrier, and an ultrathin copper layer laminated on the intermediate layer, wherein the intermediate foil is configured with a Ni layer in contact with an interface of the copper foil carrier and a Cr layer in contact with an interface of the ultrathin copper layer, said Ni layer containing 1,000-40,000 µg/dm 2 of Ni and said Cr layer containing 10-100 µg/dm 2 of Cr is provided.
摘要:
There is provided a high-strength thick-walled electric resistance welded steel pipe having excellent low-temperature toughness and excellent HIC resistance and having a yield strength of 400 MPa or more. Steel is heated to and held at a temperature in the range of 1200°C to 1280°C. The steel has a chemical composition consisting of C: 0.025% to 0.084%, Si: 0.10% to 0.30%, Mn: 0.70% to 1.80%, controlled amounts of P, S, Al, N, and O, Nb: 0.001% to 0.065%, V: 0.001% to 0.065%, Ti: 0.001% to 0.033%, and Ca: 0.0001% to 0.0035% on a mass percent basis and the remainder being Fe and incidental impurities, and satisfies Pcm of 0.20 or less. The steel is hot-rolled at a rolling reduction of 20% or more in an unrecrystallization temperature range. After the completion of the hot-rolling, the steel is cooled to a finish cooling temperature of 630°C or less at a cooling rate in the range of 7°C/s to 49°C/s and is coiled at 400°C or more and less than 600°C to form a hot-rolled steel strip. The hot-rolled steel strip is subjected to roll-forming and electric resistance welding to produce an electric resistance welded steel pipe. The welded portion of the electric resistance welded steel pipe is then subjected to a heat treatment in which the welded portion is heated to a temperature in the range of 800°C to 1150°C over the total wall thickness and is then cooled to 630°C or less at an average cooling rate in the range of 7°C/s to 49°C/s. The base steel portion and the electric resistance welded portion of the resulting high-strength thick-walled electric resistance welded steel pipe have excellent low-temperature toughness and excellent HIC resistance.
摘要:
The present invention provides a carrier-attached copper foil, wherein an ultrathin copper foil is not peeled from the carrier prior to the lamination to an insulating substrate, but can be peeled from the carrier after the lamination to the insulating substrate. A carrier-attached copper foil comprising a copper foil carrier, an intermediate layer laminated on the copper foil carrier, and an ultrathin copper layer laminated on the intermediate layer, wherein the intermediate foil is configured with a Ni layer in contact with an interface of the copper foil carrier and a Cr layer in contact with an interface of the ultrathin copper layer, said Ni layer containing 1,000-40,000 µg/dm 2 of Ni and said Cr layer containing 10-100 µg/dm 2 of Cr is provided.
摘要:
A centrifugally cast composite roll comprising an outer layer made of cast iron having a chemical composition comprising, by mass, 2.7-3.5% of C, 1.5-2.5% of Si, 0.4-1.0% of Mn, 3.7-5.1% of Ni, 0.8-2.2% of Cr, 1.5-4.5% of Mo, 2.0-4.5% of V, and 0.5-2.0% of Nb, the balance being Fe and inevitable impurities, a mass ratio of Nb/V being 0.18-0.65, and a mass ratio of Mo/V being 0.7-2.5, and a structure comprising, by area, 15-45% of a cementite phase and 1-10% of a graphite phase, and an inner layer made of cast iron having excellent mechanical strength and metallurgically bonded to the outer layer; a usable region of the outer layer as deep as 10 mm or more from the surface containing substantially no speck-like-segregated dendrites of bainite and/or martensite having diameters of 1.5 mm or more.
摘要翻译:一种离心铸造复合辊,包括由铸铁制成的外层,其具有以质量计包含C:2.7-3.5%,Si:1.5-2.5%,Mn:0.4-1.0%,Ni:3.7-5.1% Cr的0.8-2.2%,钼的1.5-4.5%,V的2.0-4.5%以及Nb的0.5〜2.0%,余量为Fe和不可避免的杂质,Nb / V的质量比为0.18〜0.65, Mo / V的质量比为0.7-2.5,并且包括面积为15-45%的渗碳体相和1-10%石墨相的结构,以及由铸铁制成的具有优异的机械强度的内层 并与外层冶金结合; 从基本上不含有直径为1.5mm以上的贝氏体和/或马氏体的斑点状分离的树突的表面,外层的可用区域为10mm以上。