鋼管用ねじ継手とその表面処理方法
    218.
    发明申请
    鋼管用ねじ継手とその表面処理方法 审中-公开
    用于钢管的螺纹接头和用于表面处理螺纹接头的方法

    公开(公告)号:WO2002084163A1

    公开(公告)日:2002-10-24

    申请号:PCT/JP2002/003588

    申请日:2002-04-11

    Inventor: 後藤 邦夫

    Abstract: A threaded joint for steel pipe formed of a pin and a box having a contact surface including threaded parts and a non-threaded metal contact part and capable of preventing a seizure by repeated tightening and loosening operations without applying compound grease thereto, wherein a solid lubricating film including lubricating powder such as molybdenum disulfide and resin binder is formed on the contact surface of at least one of the pin and box by drying the film by a primary heating in the temperature range of 70 to 150 DEG C and by a secondary heating in the temperature range of more than 150 to 380 DEG C, the solid lubricating film thus obtained has a Rockwell M scale hardness of 70 to 140, an adhesive strength of 500 N/m or higher obtained by the SAICAS method (surface-boundary cutting method), and excellent seizure resistance and airtightness even in a high temperature well environment, and, when ultraviolet ray shielding particles such as titanium oxide are contained in the solid lubricating film, the rust-proofness of the threaded joint is increased.

    Abstract translation: 一种由销和盒形成的钢管螺纹接头,其具有包括螺纹部分和非螺纹金属接触部分的接触表面,并且能够通过反复紧固和松动操作来防止发生卡死而不将复合润滑剂施加到其上,其中固体润滑 包括润滑粉末如二硫化钼和树脂粘合剂的薄膜通过在70至150℃的温度范围内通过一次加热将该薄膜干燥而形成在至少一个针和盒的接触表面上,并通过二次加热 在150〜380℃的温度范围内,由此获得的固体润滑膜的洛氏硬度为70〜140,通过SAICAS法得到的粘合强度为500N / m以上(表面切割法 ),即使在高温环境下也具有优异的耐咬合性和气密性,并且当固体中含有氧化钛等紫外线屏蔽粒子时 润滑膜,螺纹接头的防锈性提高。

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