公开(公告)号：US20160340754A1

公开(公告)日：2016-11-24

申请号：US15114523

申请日：2015-01-27

Applicant: LUXEMBOURG PATENT COMPANY S.A.

Inventor： Stephan Sellen ,  Philippe LU

IPC: C21D7/12 ,  F16K27/00 ,  C22F1/04

CPC classification number: C21D7/12 ,  B23P9/02 ,  C22F1/04 ,  C22F1/05 ,  F16K27/00

Abstract: The invention is directed to a method for improving the mechanical behavior of a metallic body (4) comprising an internal volume for a fluid and at least one threaded connecting port (6, 8) to said internal volume, the method comprising a step of treatment by autofrettage of the internal volume by applying a pressure to a liquid inside said volume. The autofrettage step comprises closing the internal volume by screwing a plug (28) to each the at least one threaded connecting port (8), so that the thread(s) of said port(s) is/are also subject to the autofrettage treatment. The invention is also directed to a body (4) resulting from such a treatment, with compressive stresses at the root of one of the most carrying turns of the thread of each of the connecting ports. The compressive stresses improve the fatigue behavior of the body.

Abstract translation: 本发明涉及一种用于改善金属体（4）的机械性能的方法，所述金属体包括用于流体的内部容积和至少一个与所述内部体积的螺纹连接口（6,8）的所述内部容积，所述方法包括处理步骤 通过对所述体积内的液体施加压力，通过内部容积的自动补偿。 自动摩擦步骤包括通过将插头（28）拧到每个至少一个螺纹连接端口（8）上来闭合内部容积，使得所述端口的线路也经受自动紧急处理 。 本发明还涉及由这种处理产生的主体（4），其中每个连接端口的螺纹的最大承载转弯之一处的根部具有压应力。 压应力提高身体的疲劳行为。