Method for producing seamless tubes
    22.
    发明授权
    Method for producing seamless tubes 有权
    无缝管生产方法

    公开(公告)号:US08490452B2

    公开(公告)日:2013-07-23

    申请号:US13205985

    申请日:2011-08-09

    Abstract: Provided is a method for producing a seamless tube, in which after a starting material to be extruded has been heated to a heating temperature T [° C.] satisfying the relationship of Formula (1) or Formula (2) depending on the outside diameter d0 [mm] thereof, the starting material is hot extruded by providing a solid lubricating glass between the starting material to be extruded and a die, whereby a transverse flaw on the outer surface in the top portion of tube can be prevented when hot extrusion is performed by using a starting material for extrusion having low deformability at high temperatures. When d0

    Abstract translation: 本发明提供一种无缝管的制造方法,其中待挤出原料已经被加热至满足式(1)或式(2)的关系的加热温度T [℃],取决于外径 d0 [mm],通过在待挤出的起始材料和模具之间提供固体润滑玻璃来热原料,由此当热挤出为热挤压时,可以防止管顶部的外表面上的横向缺陷 通过使用在高温下具有低变形性的用于挤出的原料进行。 当d0 <200时,T@1250+1.1487×A-7.838×ln(t0 / t)-10.135×ln(d0 / d)。 。 。 (1); 当d0> = 200时,T@1219+1.1487×A-7.838×ln(t0 / t)-10.135×ln(d0 / d)。 。 。 (2),其中A = L / Vav×1000 [msec]。 Vav =(V0 + V0×rho)/ 2 [mm / sec],rho =(t0×(d0-t0))/(t×(dt)),t0:待挤出的原料壁厚[mm] d:挤出管的外径[mm],t:壁厚[mm],L:挤出方向的模具的接近部分的长度[mm],V0:冲头速度[mm / sec]。

    Bearing material
    29.
    发明授权
    Bearing material 失效
    轴承材料

    公开(公告)号:US4312772A

    公开(公告)日:1982-01-26

    申请号:US173932

    申请日:1979-08-14

    Applicant: Sanae Mori

    Inventor: Sanae Mori

    Abstract: A porous metal or alloy layer is formed by sintering or the like on a metal backing formed of steel, for example. Copper or a copper-base alloy is generally used for forming the porous metal or alloy layer. The porous metal or alloy layer having the metal backing is impregnated with a mixture comprising 1-25% by volume of lead fluoride, 1-30% by volume of one or both of lead and a lead-tin alloy consisting of 3-30% by weight of tin and the remainder being lead, and the remainder essentially polytetrafluoroethylene, wherein the lead fluoride and one or both of the lead-tin alloy and lead being 2-25% by volume in total, thereby a bearing material of this invention is provided. Depending on the use to which the bearing material is put, at least one additive selected from the group consisting of molybdenum, tungsten disulfide, cadmium oxide, aluminum oxide, calcium fluoride, lithium fluoride, graphite, lead iodide, glass fibers, carbon fibers and a phosphate may be contained in 0.1-5% by volume in the mixture, to improve the performance of the bearing. The bearing material of this kind is suitable for use in shock absorbers of vehicles or the like which move in reciprocatory sliding movement under varying loads.

    Abstract translation: 例如,在由钢构成的金属背衬上通过烧结等形成多孔金属或合金层。 铜或铜基合金通常用于形成多孔金属或合金层。 具有金属背衬的多孔金属或合金层用含有1-25体积%的氟化铅,1-30体积%的铅和由3-30重量%的铅 - 锡合金组成的铅 - 锡合金的混合物浸渍, 的锡,其余为铅,其余为聚四氟乙烯,其中铅氟化物和铅锡合金和铅中的一种或两种总共为2-25体积%,从而本发明的轴承材料为 提供。 根据放置轴承材料的用途,选自钼,二硫化钨,氧化镉,氧化铝,氟化钙,氟化锂,石墨,碘化铅,玻璃纤维,碳纤维中的至少一种添加剂和 混合物中磷酸盐的含量可以为0.1-5体积%,以提高轴承的性能。 这种轴承材料适用于在变化的载荷下往复运动中移动的车辆等的减震器。

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