超声冲击对钛合金焊缝表面压应力的影响

为了研究超声冲击处理对钛合金焊缝压应力的影响,通过在不同的工作电流、不同的冲击头的工作条件下,对不同厚度的钛合金焊接试板进行超声冲击处理。结果表明超声冲击产生的压应力与焊接试板的厚度和结构没有明显的对应关系,而与冲击头的类型与工作电流有关。同时压应力的大小与工作电流呈线性正相关,并且通过拟合得到的直线能够比较准确的反应电流与压应力的关系。试验结果表明超声冲击不仅可以在焊缝及热影响区产生对工件有益的压应力,同时通过控制工艺参数,可以控制压应力的大小。

Influence of Ultrasonic Impact Treatment ( UIT) onSurface Impact Stress of Ti Alloy Welding Beams

In order to further investigate the influence of UIT on the surface compact stress of Ti alloy welding beams,the UIT treatment with different working currents and working hammers on the Ti alloy welding sheets of different thickness were carried out.The results showed that compact stress is related to impact hammer style and working current,and the stress is linear with the working current.The fitting straight line had a good response to the relation between the compact stress and working current.According to the experiment results,it is found the UIT can not only create compact stress on the welding beams and hot-affected zone which is good for the welding parts,and different compact stress values can be obtained by controlling the UIT parameters.