Method of manufacturing seamless steel pipe
    196.
    发明专利
    Method of manufacturing seamless steel pipe 有权
    制造无缝钢管的方法

    公开(公告)号:JP2012130945A

    公开(公告)日:2012-07-12

    申请号:JP2010285670

    申请日:2010-12-22

    Abstract: PROBLEM TO BE SOLVED: To provide a method of manufacturing a seamless steel pipe, which can efficiently manufacture the seamless steel pipe by reliably improving a service life of a boring rolling plug without declining efficiency of boring rolling.SOLUTION: When boring rolling is performed by using a plug in which a protective coating is formed on the surface, a lubricant of a water solution including 5-30 mass% in total of one type or two types or more out of boric oxide, boric acid and boric acid amine salt is applied to the protective coating on the plug surface. The plug is used for the boring rolling. After the boring rolling, the plug is cooled, and in the state where surface temperature of the plug tip is lowered to 100°C or less, the lubricant is applied. It is preferable to use the plug for the boring rolling again. Preferably, the protective coating on the plug surface is formed by electric arc spraying of an iron wire material on the surface of a plug base material, and comprises oxide and Fe.

    Abstract translation: 解决问题的方案:提供一种制造无缝钢管的方法,其可以通过在不降低镗削效率的情况下可靠地提高镗孔塞的使用寿命来有效地制造无缝钢管。 解决方案:当通过使用在表面上形成保护涂层的塞子进行镗削时,包含总共5〜30质量%的一种或两种以上的硼的水溶液的润滑剂 氧化物,硼酸和硼酸胺盐施加到插头表面上的保护涂层上。 该插头用于镗孔。 在镗削之后,将塞子冷却,并且在将塞头的表面温度降低到100℃以下的状态下,施加润滑剂。 最好再次使用插头进行镗削。 优选地,塞表面上的保护涂层是通过电弧喷涂铁丝材料形成在塞子基材的表面上,并且包括氧化物和Fe。 版权所有(C)2012,JPO&INPIT

Patent Agency Ranking