公开(公告)号：EP2141252A1

公开(公告)日：2010-01-06

申请号：EP07742020.6

申请日：2007-04-20

申请人： Mitsubishi Heavy Industries, Ltd.

发明人： OTA, Takahiro ,  TSUBOTA, Shuho ,  ISHIDE, Takashi ,  KAMO, Kazuhiko ,  SUGIMOTO, Noriaki ,  HEMMI, Yoshiyuki ,  ONITSUKA, Hironori ,  AKABA, Takashi

IPC分类号： C21D9/50 ,  C21D1/30 ,  C21D1/34 ,  C21D9/08

CPC分类号： C21D9/08 ,  B23K26/0006 ,  B23K26/0066 ,  B23K26/067 ,  B23K26/0676 ,  B23K26/0823 ,  B23K2201/06 ,  B23K2203/04 ,  B23K2203/05 ,  B23K2203/18 ,  B23K2203/26 ,  B23K2203/50 ,  C21D1/09 ,  C21D1/30 ,  C21D1/34 ,  C21D9/50

摘要： An object is to provide a method and an apparatus for improving a residual stress in a tubular body, which are enabled to improve the residual stress reliably by clearly defining controlling rage for treatment conditions without depending on an installation state and configuration of the tubular body. When an outer-circumferential surface of a welded portion of a cylindrical tubular body (2) is irradiated with a laser beam that circles around an outer circumference of the tubular body (2), a heating width W in a circumferential direction heated by the laser-beam irradiation and a laser-beam moving speed V in the circumferential direction are set so that a stress in the circumferential direction in an inner surface of the tubular body (2) produced by the heating with the laser beam is at least larger than a yielding stress of a material that the tubular body (2) is made of.

摘要翻译： 本发明的目的是提供一种用于改善管状体中的残余应力的方法和装置，其能够通过在不依赖于管状体的安装状态和构造的情况下清楚地限定治疗条件的控制力而可靠地改善残余应力。 当圆筒形管体（2）的焊接部分的外圆周表面照射围绕管状体（2）的外周的激光束时，由激光器加热的圆周方向上的加热宽度W 光束照射和周向上的激光束移动速度V被设定为使得通过用激光束加热产生的管状体（2）的内表面中的圆周方向的应力至少大于 产生管状体（2）制成的材料的应力。

公开(公告)号：EP2022598A1

公开(公告)日：2009-02-11

申请号：EP07740342.6

申请日：2007-03-29

申请人： Mitsubishi Heavy Industries, Ltd.

发明人： OTA, Takahiro ,  HEMMI, Yoshiyuki ,  ONITSUKA, Hironori ,  SUGIMOTO, Noriaki ,  KAMO, Kazuhiko ,  TSUBOTA, Shuho ,  MUROYA, Itaru

IPC分类号： B23K31/00 ,  B23K26/00 ,  B23K26/04 ,  B23K26/20 ,  C21D1/30 ,  C21D1/34 ,  C21D9/08 ,  C21D9/50 ,  B23K101/06

CPC分类号： C21D1/30 ,  B23K26/0626 ,  B23K26/0823 ,  B23K2201/06 ,  C21D1/34 ,  C21D9/08 ,  C21D9/50

摘要： An obj ect is to provide a method and a system for improving a residual stress in a tube body, with which the residual stress can reliably be improved without heating excessively. From an irradiation start angle θs to a first predetermined angle θ1 on the tube body, an intensity of a laser beam is gradually increased from 0.5 to the steady output of 1.0 output ratio; from the first predetermined angle θ1 to a second predetermined angle θ2, the intensity of the laser beam is set at 1.0 output ratio; from the second predetermined angle θ2 to an irradiation end angle θe, the intensity of the laser beam is gradually decreased from the 1.0 output ratio to 0.5; and at the irradiation end angle θe, the intensity of the laser beam is set to 0. All these steps are performed at one turn of rotation in the method and the system for improving residual stress in the tube body.

摘要翻译： 本发明的目的是提供一种用于改善管体中的残余应力的方法和系统，通过该方法和系统可以可靠地改善残余应力而不会过度加热。 从管体上的照射开始角度¸s到第一预定角度¸1，激光束的强度从0.5逐渐增加到1.0输出比的稳定输出; 从第一预定角度¸1到第二预定角度¸2，将激光束的强度设定为1.0的输出比; 从第二预定角度¸2到照射端角¸e，激光束的强度从1.0的输出比逐渐降低到0.5; 并且在照射端角θ下，激光束的强度设定为0.所有这些步骤都是在该方法中的一圈旋转和用于改善管体中的残余应力的系统中进行的。