超生波焊接制备功能梯度材料

Study on the functional gradient materials prepared by ultrasonic welding

采用超声波焊接的方法成功制备了功能梯度材料,它具有简便、环保、快速成型的特点。实验以铝合金6061、3003、纯钛、钛合金Ti-6Al-4V和纯镍为材料,利用超声波焊接方法制备Al/Ti/Ni功能梯度材料。通过金相显微分析、显微硬度分析、EDS分析对其焊接界面的微观结构、显微硬度、焊缝原子扩散程度进行测试和表征。结果表明:接头的结合形式常伴有机械嵌合,结合程度趋于金属间的键合,接头总体硬度值增大,在焊缝处达到峰值,界面两侧金属元素能在不到0.2 s的焊接时间下实现界面间的元素相互扩散和渗透,达到梯度材料的设计要求。

This article takes the lead in using ultrasonic welding method successfully to prepare Ti/Al/Ni functional gradient materials with 6061 aluminum alloy,pure titanium,titanium alloy,3003Ti-6Al-4V and pure nickel.This method is simple,environment-friendly and forming rapid,its welding interface microstructure,microhardness,weld atomic diffusion degree was investigated by metallographic micro-structure,micro-hardness and EDS analysis.The results showed that the combining form of the joint is often accompanied by mechanical tabling and combining degree tends to the bonding between metals.The total hardness value of joint increases and the maximum hardness value is the one of weld seams,the metal elements on both sides of the interface can diffuse and penetrate through the interface in less than 0.2 seconds welding time.This gradient materials can achieve the design requirements of gradient materials.