在性能方面，强度被显著地提高，机械疲劳性能变化不明显，冲击韧性和塑性降低。
On mechanical properties, the strength was raised obviously, fatigue property was unchanged, impact toughness and ductility were reduced.
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.
随着C含量提高，焊接粗晶区中的晶粒粗化被抑制，因此，使得冲击性能和疲劳强度被明显提高。
As carbon content increasing, the grain coarsening of CGHAZ is inhibited, thus, the impact toughness and fatigue strength are significantly improved.
与安全性相关的研究主要围绕座椅的静强度、冲击强度以及疲劳强度的分析。
And the research about seat safety concentrates on the analysis of static strength, impact strength and fatigue strength.
文中利用自行研制的超声波冲击实验装置，对提高低碳钢焊接接头疲劳强度进行了研究。
In this paper, it was studied to improve the fatigue strength of welded joints and structrures of low carbon steel Q235B by peening the welded toes with ultrasonic equipment.
在抗张强度没有明显降低的条件下，新创立的双时效比正常时效的冲击疲劳寿命与动态断裂韧性分别延长和提高了35 。
By our new way of double aging, on which we have done research since 2002, the impact fatigue life can be prolonged by 35.
纵向角接接头超声冲击处理试件与原始焊态试件相比，疲劳强度提高1 73 %左右，疲劳寿命延长了3 2～ 70倍。
The fatigue strength of the longitudinal fillet welded joint specimen treated by ultrasonic peening increases by about 173% and the fatigue lifetime prolonges by 32~70 times.
纵向角接接头超声冲击处理试件与原始焊态试件相比，疲劳强度提高1 73 %左右，疲劳寿命延长了3 2～ 70倍。
The fatigue strength of the longitudinal fillet welded joint specimen treated by ultrasonic peening increases by about 173% and the fatigue lifetime prolonges by 32~70 times.
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