公开(公告)号：US20150084333A1

公开(公告)日：2015-03-26

申请号：US14560271

申请日：2014-12-04

Applicant: ALSTOM Renewable Technologies

Inventor： Serge PRIGENT ,  Florian DUPARCHY ,  Arnaud DONCOURT

IPC: C21D9/50 ,  F16L13/02 ,  B23K31/02

CPC classification number: C21D9/505 ,  B23K9/02 ,  B23K9/173 ,  B23K31/02 ,  B23K35/004 ,  B23K35/3073 ,  B23K2103/04 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/008 ,  F16L13/02

Abstract: The present application describes a method for welding two parts to each other. The two parts are made from steel having a high thermomechanical yield strength. The welding method includes a welding step in which a weld bead is created inducing a heat-affected zone to appear. The method also includes a heat treatment step having a heating step, during which at least one portion of the weld bead and the HAZ is gradually heated to a treatment temperature; then a holding step in which the portion of the weld bead and the HAZ is kept at the treatment temperature; then a cooling step in which the HAZ and the weld bead are gradually cooled and pass from the austenitic transformation end temperature to the martensitic transformation end temperature of the steel of the parts in a time between 7.5 s and 8.5 s, and pass from the austenitic transformation end temperature to the martensitic transformation end temperature in a time shorter than 15.5 s. The present application also describes a penstock obtained with such a method.

Abstract translation: 本申请描述了一种彼此焊接两部分的方法。 两部分由具有高热机械屈服强度的钢制成。 焊接方法包括焊接步骤，其中产生引起热影响区域出现的焊道。 该方法还包括具有加热步骤的热处理步骤，在该步骤期间，将焊珠和HAZ的至少一部分逐渐加热至处理温度; 然后将焊道和HAZ的一部分保持在处理温度的保持步骤; 然后在7.5s和8.5s之间的时间内将HAZ和焊道逐渐冷却并从奥氏体转变终止温度传递到部件的钢的马氏体转变结束温度，并从奥氏体 在短于15.5秒的时间内将转化结束温度转变为马氏体转化终止温度。 本申请还描述了用这种方法获得的笔筒。