鋼管用ねじ継手
    1.
    发明申请
    鋼管用ねじ継手 审中-公开
    钢管螺纹接头

    公开(公告)号:WO2003010460A1

    公开(公告)日:2003-02-06

    申请号:PCT/JP2002/007355

    申请日:2002-07-19

    Abstract: A metal−sealable threaded joint for steel tube capable of being tightened and loosened repeatedly without applying liquid lubricant containing heavy metal powder thereon, comprising a pin and a box each having a contact surface containing a screw part and a screw−less metal contact part, wherein the contact surface of at least one of the pin and box is covered with a surface prepared layer and a lubrication film layer covered thereon, the surface prepared layer should desirably be a porous metallic layer of Hv 50 to 250 having a porosity of 5 to 80% and a thickness of 1 to 30 μm, and the lubrication film layer is formed of a solid lubrication film or a liquid lubrication film not containing substantially heavy metal powder, and the total of the thicknesses of the surface prepared layer and the lubrication film layer is 100 μm or less.

    Abstract translation: 一种用于钢管的可金属密封的螺纹接头,其能够在不涂覆含有重金属粉末的液体润滑剂的情况下重复地拧紧和松动,包括销和盒,每个销和盒均具有包含螺纹部分和无螺纹的金属接触部分的接触表面, 其中所述销和箱中的至少一个的所述接触表面覆盖有表面准备层和覆盖在其上的润滑膜层,所述表面制备层应期望地为Hv 50至250的多孔金属层,孔隙率为5至 80%,厚度1〜30μm,润滑膜层由不含重金属粉末的固体润滑膜或液体润滑膜形成,表面处理层和润滑膜的总厚度 层为100μm以下。

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