使用超声波冲击焊趾来提高焊接接头及结构的疲劳强度，是国际上刚刚出现的一种新方法。
It is a new method to increasing fatigue strength of welded joints and structure by peening welded toes with ultrasonic peening equipment.
使用超声波冲击焊趾来提高焊接接头及结构的疲劳强度，是一种国际上刚刚出现的新方法。
It's a new method to increase fatigue strength of welded joints and structure by peening toe of weld with ultrasonic peening equipment.
因此，要求钢具有高的弹性极限，高的疲劳强度以及高的冲击韧性和塑性。
Thus, requirements of steel with high elastic limit, high fatigue strength and high impact toughness and plasticity.
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