Silver-electroplating process
    1.
    发明授权
    Silver-electroplating process 失效
    银电镀工艺

    公开(公告)号:US4177114A

    公开(公告)日:1979-12-04

    申请号:US937803

    申请日:1978-08-29

    IPC分类号: C23C18/44 C25D3/46 C25D5/34

    摘要: A process for silver-plating, which comprises steps of preplating a substrate material in an aqueous preplating solution comprising 10.sup.-5 to 0.02 mole/l of silver and more than 0.01 mole/l of a silver complexing agent such as thiocyanic ions under non-current density, to preplate a sufficient thickness of silver to restrain or substantially prevent substitution plating, and then electroplating the preplated substrate material until a sufficient thickness by supplying an electric current to said material in an aqueous silver plating solution comprising silver ions, thiocyanic ions and a film improving agent.

    摘要翻译: 一种镀银方法,其包括以下步骤:在非水溶液中预沉积含有10-5至0.02摩尔/升银和大于0.01摩尔/升银络合剂例如硫氰酸根离子的预浸镀水溶液中的基底材料, 电流密度,以预先镀银足够的厚度以抑制或基本上防止替代电镀,然后通过在包含银离子,硫氰酸离子的水性镀银溶液中向所述材料提供电流而将预镀的衬底材料电镀至足够的厚度, 电影改良剂。

    Surface hafnium-titanium carbide coated hard alloy and method
    4.
    发明授权
    Surface hafnium-titanium carbide coated hard alloy and method 失效
    表面铪 - 碳化钛涂层硬质合金及方法

    公开(公告)号:US4269899A

    公开(公告)日:1981-05-26

    申请号:US54274

    申请日:1979-07-02

    摘要: A surface coated hard alloy material suitable for use as a material of cutting tools, anti-wear parts or the like in which high wear resistance, oxidation resistance and anti-weld characteristic are the essential requisites, and a method of producing the same. The material has a substrate of cemented carbide, cermet or the like material, a first coating layer of a hafnium compound and directly coating the substrate, a second coating layer of a solid solution of a hafnium compound and a titanium compound and coating the first coating layer, and a third coating layer of a titanium compound and coating the second coating layer. These coating layers are successively formed in a common reaction system, so that the adherence between the coating layers, as well as between the first coating layer and the substrate is remarkably improved. Also, the advantages of the hafnium compound layer and the titanium compound layer are effectively utilized to provide a high wear resistance, oxidation resistance and anti-weld characteristic of the final surface coated hard alloy material.

    摘要翻译: 适合用作高耐磨性,耐氧化性和抗焊接特性的切削工具,耐磨部件等的材料的表面涂覆的硬质合金材料及其制造方法。 该材料具有硬质合金,金属陶瓷等材料的基材,铪化合物的第一涂层并直接涂覆基材,铪化合物和钛化合物的固溶体的第二涂层,并涂覆第一涂层 层和第三涂层,并涂覆第二涂层。 这些涂层依次形成在共同的反应体系中,使得涂层之间以及第一涂层和基材之间的粘附性显着提高。 此外,有效地利用铪化合物层和钛化合物层的优点,以提供最终的表面涂覆的硬质合金材料的高耐磨性,抗氧化性和抗焊接特性。

    High temperature thermistor
    6.
    发明授权
    High temperature thermistor 失效
    高温热敏电阻

    公开(公告)号:US4467309A

    公开(公告)日:1984-08-21

    申请号:US371571

    申请日:1982-04-26

    摘要: A high-temperature thermistor comprising, a polycrystalline sintered body consisting essentially of 0.1-8 weight percents of at least one kind selected from the group consisting of Be, BeO, Be.sub.2 C, B, BN, B.sub.2 O.sub.3 and B.sub.4 C which weight percents are calculated as the amount of only Be or B single substance from net amount, the balance SiC, and the inevitable impurities having not more than 2 weight percents of SiO.sub.2, not more than 0.1 weight percent of Al, not more than 0.2 weight percents of Fe, not more than 1 weight percent of Si, and not more than 0.4 weights percents of free carbon, a pair of electrode provided on the surfaces of the sintered body, and lead wires each connected to the respective electrodes, and a method of producing same.

    摘要翻译: 一种高温热敏电阻器,其特征在于,包括:基本上由0.1-8重量%的至少一种选自Be,BeO,Be2C,B,BN,B2O3和B4C组成的多晶烧结体,所述重量百分数计算为 量为单纯的Be或B单一物质,余量为SiC,不可避免的杂质为不超过2重量%的SiO 2,不超过0.1重量%的Al,不超过0.2重量%的Fe,不超过 1重量%以上,不超过0.4重量%的游离碳,设置在烧结体表面的一对电极和各自连接到各个电极的引线及其制造方法。