摘要:
A hot-dip aluminium coated steel sheet having excellent corrosion resistance and heat resistance, comprising a steel substrate containing 3 to 18% chromium, not more than 0.02% carbon, 0.1 to 1.5% manganese, 0.005 to 0.08% aluminium, not more than 0.1% silicon, with the balance being iron and unavoidable impurities, and aluminium coating on said sheet substrate. The coated sheet may further comprises a coating layer of nickel or nickel-iron alloy (Ni: 1 to 99%) beneath the aluminium coating, or an Al-Fe-Si-Ni-Cr alloy coating layer of 1 to 10.mu. in thickness and containing 0.05 to 5% nickel, 0.2 to 10% chromium, beneath the aluminium coating.
摘要:
Coated steel sheet of high corrosion resistance comprises a sheet of steel containing not more than 0.1% by weight of carbon, 0.005 to 0.08% by weight of soluble aluminum and 0.2 to 20% by weight of chromium, the balance being iron and unavoidable impurities. The steel carries a nickel or nickel alloy layer formed on at least one surface thereof and having a thickness of 0.001 to 1.5 microns and a layer of tin formed on the nickel or nickel alloy layer and having a thickness of at least 0.05 micron. A method of producing it is also disclosed.
摘要:
A chromate surface treated steel sheet having very excellent paintability, corrosion resistance, and workability, more specifically surface treated steel sheets for paint coating, having very excellent properties, specifically with respect to corrosion resistance after paint coating, paint adhesion in services long after the paint coating (so-called secondary paint adhesion), corrosion resistance of paint coating defect portions, and resistance to secondary work cracking. The steel sheet contains not more than 0.15% carbon, 0.005 to 0.10% acid soluble aluminium, 0.5 to 20% chromium with the balance being iron and unavoidable impurities, and the chromate coating applied on the steel substrate comprises a metallic chromium layer in an amount ranging from 1 to 300 mg/m.sup.2, and a hydrated chromium oxide layer in an amount ranging from 5 to 50 mg/m.sup.2 in term of the metallic chromium contained therein.
摘要翻译:铬酸盐表面处理钢板具有非常优异的可涂饰性,耐腐蚀性和可加工性,更具体地说是用于涂料的表面处理钢板,具有非常优异的性能,特别是涂漆后的耐腐蚀性,涂料后的涂料粘合性 涂层(所谓的二次漆附着),涂料缺陷部分的耐腐蚀性,以及二次加工开裂性。 该钢板含有不超过0.15%的碳,0.005〜0.10%的酸溶性铝,0.5〜20%的铬,余量为铁和不可避免的杂质,施加在钢基材上的铬酸盐镀层含有金属铬层 范围为1〜300mg / m 2,水合氧化铬层的含量为5〜50mg / m 2。
摘要:
A polyol composition contains a polyaminochlorophenylmethane mixture (A) and a polyol (B), in which the component (A) is uniformly dissolved in the component (A) in a weight ratio of 30/70 to 60/40. The component (A) includes 50 to 70% by weight of a specific binuclear polyaminochlorophenylmethane compound, 20 to 40% by weight of a specific trinuclear polyaminochlorophenylmethane compound and 5 to 10% by weight of a specific tetranuclear or higher polyaminochlorophenylmethane compound. The polyol composition exhibits excellent miscibility and dissolution stability, is liquid and enables molding of a foamed article for abrasive in a simple two-component mixing casting machine. According to the present invention, water serving as a foaming agent can be added to the polyol composition containing MBOCA, and the composition for a two-component curable abrasive foam can be held to a temperature equal to or lower than the boiling point of water, thus avoiding water from evaporating upon molding. The resulting abrasive foam has a uniform density distribution and exhibits excellent mechanical properties. A method for satisfactorily producing such an abrasive foam is also provided.
摘要:
A composite polymer electrolyte membrane which includes an ion-conductive polymer gel contained and supported by a matrix material formed of a porous polytetrafluoroethylene membrane. The porous polytetrafluoroethylene membrane has an internal structure which defines a three-dimensional network of interconnected passages and pathways throughout the membrane. The composite polymer electrolyte membrane has a tensile break strength of at least 10 MPa in at least two orthogonal planar directions, ion conductivity of at least 1 mS/cm, and is useful as a separator between electrodes of a lithium secondary cell.
摘要:
An optical measuring apparatus and a method of the same wherein any two points, inside and outside of an optical picture image of a measuring object mounted on the table and projected by an optical system, are designated on a screen by a cursor and then the table and the optical system are moved relatively so that a line segment between the designated two points is detected to thereby take measurements for the measuring object.
摘要:
A coated optical fiber comprising an optical fiber; a first layer of a thermoplastic rubber composition which is disposed around the circumference of the optical fiber, has a Young's modulus of 0.1 GPa or less, and is capable of extrusion coating; and a second layer of a thermoplastic resin composition which is disposed around the circumference of the first layer, has a linear expansion coefficient of 1.times.10.sup.-5.degree. C..sup.-1 or less and a Young's modulus of 5 GPa or more, and is capable of extrusion coating. The coated optical fiber has excellent transmission characteristics at low and high temperatures and is inexpensive.
摘要:
A semiconductor package includes a base substrate on which semiconductor elements are disposed; a covering member which is provided to the base substrate, which covers the semiconductor elements, and which includes an opening at an end thereof at the side of the base substrate; and a connector substrate which is provided on the base substrate in a manner that the connector substrate closes the opening, which includes a first high-frequency signal line in an area located inside the covering member for a first surface, and which includes a second high-frequency signal line on a second surface being a surface on the opposite side of the first surface, the second high-frequency signal line being electrically connected to the first high-frequency signal line; wherein the base substrate is formed in a manner that the base substrate is located away from the second high-frequency signal line.
摘要:
A semiconductor package includes a base substrate on which semiconductor elements are disposed; a covering member which is provided to the base substrate, which covers the semiconductor elements, and which includes an opening at an end thereof at the side of the base substrate; and a connector substrate which is provided on the base substrate in a manner that the connector substrate closes the opening, which includes a first high-frequency signal line in an area located inside the covering member for a first surface, and which includes a second high-frequency signal line on a second surface being a surface on the opposite side of the first surface, the second high-frequency signal line being electrically connected to the first high-frequency signal line; wherein the base substrate is formed in a manner that the base substrate is located away from the second high-frequency signal line.
摘要:
A polyimide optical waveguide comprising a core made of polyimide whose refractive index is controlled to a predetermined value by electron beam irradiation, and a cladding set in contact with the core and having a refractive index lower than that of the core.