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.
超级钢的主要特征是高洁净度和超细晶粒组织，在不增加任何合金元素的情况下，其强度、韧性和使用寿命提高一倍。
Ultra steel is characterized by its higher cleanness and ultra-fine grain, thus it has higher strength, toughness and longer life even without addition of more alloying elements.
论述了超细晶粒钢的超细晶粒及高强度与高韧性良好匹配的特点。
With the features of ultrafine grain, fair matching of high strength and high toughness in the ultrafine grain steel.
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