最近日本石川岛播磨公司研制了一种可以改善管子焊缝残余应力的新方法,叫做“感应加热改善应力法”(IHSI)。它是采用管外感应加热,内部同时进行冷却使局部塑性流通过高热应力的方法来改善残余应力。为了获得较好的条件和做好示范性试验,他们在304型奥氏体不锈钢上进行了基础研究,并采用普通应变仪对采用新方法和不采用新方法(IHSI)的残余应力进行了测量。 Recently, Ishikawa Island Broadcasting Company in Japan developed a new method to improve the residual stress of pipe welds called “IHSI”. It is the use of induction heating tube, the internal cooling at the same time to local plastic flow through the high thermal stress method to improve the residual stress. In order to get better conditions and to do a good example of the pilot, they carried out basic research on Type 304 austenitic stainless steel and measured the residual stress with the new method and with the new method (IHSI) using a conventional strain gauge .