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采用扩散连接的方法,对厚度为0.04 mm的Pd-Y合金膜与紫铜进行焊接工艺试验,利用氦质谱检漏仪检测的漏率值对焊缝质量进行评价。研究结果表明:在扩散焊接工艺条件(焊接温度750℃,保温时间90 min,压力3 MPa)下获得了质量较好的Pd-Y/Cu环形焊接接头,焊缝的漏率值为5.0×10-11Pa·m3/s。探讨了Pd-Y合金致密膜与法兰在一定工艺条件进行扩散焊连接的可行性,并提出了Pd-Y合金膜与法兰连接的工艺措施。为钯合金扩散氢气纯化装置的研制和应用提供了直接的技术支持。
The diffusion bonding method was used to test the welding process of Pd-Y alloy film with thickness of 0.04 mm and copper. The weld quality was evaluated by the leak rate value of helium mass spectrometer. The results show that a good quality Pd-Y / Cu ring welded joint is obtained under the conditions of diffusion welding (welding temperature 750 ℃, holding time 90 min, pressure 3 MPa). The leak rate of the weld is 5.0 × 10 -11Pa · m3 / s. The feasibility of diffusion bonding between the dense film of Pd-Y alloy and the flange under certain process conditions was discussed. The technological measures of the connection between the Pd-Y alloy film and the flange were proposed. For the palladium alloy diffusion hydrogen purification device development and application of direct technical support.