在试验的焊接条件下，WCX355超细晶钢在热影响粗晶区未有明显脆化，在回火区也未发生软化现象。
Under the experiment's welding condition, WCX355 ultrafine grained steels didn't distinctly embrittle in CGHAZ and didn't soften in tempering zone either.
超细晶粒钢激光焊接接头粗晶区有较好的韧性。
The coarse grain zones of laser welded joint of super fine grain steel show good toughness.
以T／P91钢为代表的新型细晶强韧型铁素体耐热钢及以TP347H为代表奥氏体不锈钢等超超临界机组锅炉用钢，已经不断被开发和应用。
As the representation of these kinds of steel, T/P91 of new grade boiler steel and TP347H of stainless steel have been developed and applied.
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