Effect of Surface Self-Nanocry Stallization on Diffusion Bonding between Titanium Alloy and Stainless Steel
-
摘要: 用恒温恒压扩散焊接法实现了表面纳米化后的TA17近α型钛合金与0Cr18Ni9Ti不锈钢的连接。焊接材料用气动喷丸方式进行表面自纳米化。利用液压万能试验机测试了接头拉伸强度,并对焊接接头及断口形貌和组织进行了扫描电镜观察及能谱分析。结果表明:接头界面附近出现了不同的层,在不同温度下的焊接接头组织及分布大致相同;与未对材料进行表面自纳米化处理相比,材料经表面自纳米化处理后,加快了被焊偶件的接触进程,提高了原子的扩散速率和焊接接头的强度,并缩短了焊接时间。Abstract: Direct diffusion bonding between a TA17 near α- titanium alloy and an 0Cr18Ni9Ti stainless steel at constant temperature and pressure has been carried out in vacuum. Titanium alloy and stainless steel had been treated by surface mechanical atrrition treatment before diffusion bonding.The tensile strength was tested by using the hydraumatic universal testing machine. SEM observation and EDS determination were employed to investigate the structure of the joint and phases on the fracture.The result show that the inter-face-structure of titanium alloy/stainless steel joint have different layered structures on the bonding inter-face.The bonding interfaces are with the same forms of the interface-structure at the different temperature; Comparing with non-treated materials, the diffusion velocity of atoms around the interface was faster,bonding time was shorter and the joint strength was higher under self-nanocrystallization condition.
-
Key words:
- Titanium alloy /
- Stainless steel /
- Surface self-nanocrystallization /
- Diffusion bonding
-
计量
- 文章访问数: 8
- HTML全文浏览量: 2
- PDF下载量: 0
- 被引次数: 0
下载:
