摘要
采用非晶箔状BNi82CrSiB钎料和10 min/60 min不同的保温时间加压扩散的方法进行了钎焊试验,对钎焊接头进行了力学性能测试。利用扫描电镜和能谱分析对钎焊接头微观组织和断口进行了观察和分析。结果表明,在1 050℃的钎焊温度下延长扩散时间(60 min)能够促进钎缝与扩散层的元素均匀分布。对比10 min保温时间,室温和930℃下的钎焊接头拉伸性能分别提高了52%和79%。研究同时得出接头断裂发生在近缝区基体一侧的结论,断裂形式主要为沿晶断裂。
The superalloy GH586 was brazed by BNi82CrSiB amorphous foil under a pressure with various holding time (10min/60min).The joint strength was tested.The microstructure and fracture appearance were observed by SEM,and some mierozones in the joint were analyzed by EDS.The results show that,the alloy elements distribute much uniformly in the brazing seam and diffusion area when the brazing time was prolonged. Compared with the brazing time of 10min,the joint strength with the holding time of 60min at room temperature and at 930 ~C was in- creased by 52% and 79% at the brazing temperature of 1050℃,respectively.It is concluded that the joint fracture appears in the base metal near brazing seam side,and shows an intergranular cracking mode.
出处
《焊接》
北大核心
2010年第1期52-56,共5页
Welding & Joining
