摘要
通过填充Ti,N元素对SiCp/A l基复合材料(SiCp/A lMMCs)进行等离子弧原位焊接,分析了焊缝的组织和力学性能.以氩、氮混合气体为离子气,0.8 mm厚钛片作为原位合金化材料进行原位焊接,不仅抑制了脆性相的形成,而且在焊缝中形成了TiN,TiC等新的增强相,保证了焊接接头的性能.力学性能试验结果表明,不加填充材料焊接时,试样拉伸强度仅为母材强度的31.24%;进行原位焊接时,试样强度达到母材强度的50.89%.断口主要表现为混合型脆性断口.
Titanium and Nitrogen elements were used as alloying metal to analyze the weldability of SiC partide reinforced aluminum metal matfic composites. Microstructure and mechanical properties of SiCp/ A1 MMCs were studied under the condition of plasma arc ＂in-situ＂ welding. The formation of Al4C3 was effectively prohibited. A new composite reinforced by TiN and TiC was produced in the weld with Ar and N2 as ionized gas and 0.8 mm thick titanium filler-plate as ＂in-situ＂ material. Consequently the quality of the joint was ensured. The mechanical testing results showed that tensile strengths of samples welded by direct welding is only 31.24% of that of the parent metal, and 50.89% of that by＂ in-situ＂ welding . The SEM observations showed that the fracture surface of welded joint exhibits hybrid tough fracture.
出处
《江苏大学学报（自然科学版）》
EI
CAS
北大核心
2006年第6期509-512,共4页
Journal of Jiangsu University：Natural Science Edition
基金
国家自然科学基金资助项目(50475126)
江苏省研究生创新基金资助项目(xm04-27)
关键词
SICP/AL基复合材料
等离子弧
原位焊接
组织
力学性能
SiCp/Al metal matrix composite
plasma are
＂in-situ＂ welding
nficrostructure
mechanical properties
