摘要
针对红外探测器杜瓦冷指的设计,应选取具有较高屈服强度、较低热导率和较低密度的材料,以提高红外探测器杜瓦的可靠性。考虑到红外探测器封装的其他结构需求,TC4钛合金与无氧铜、可伐等金属之间的焊接一般不太容易实现,试验中采用真空钎焊作为焊接手段,选取Ti-Ni-Zr-Cu钎料,对TC4钛合金与无氧铜、可伐合金的真空钎焊焊接试验结果进行比较分析,得出TC4钛合金与无氧铜、可伐合金钎焊后检漏漏率优于10^?11 torr.l/s,焊缝抗拉强度都达到150 MPa以上。
For designing cold finger of infrared detector dewar,materials with high yield strength,low thermal conductivity and low density should be selected in order to improve the reliability of infrared detector dewar.Considering other structural requirements of infrared detector package,the welding between TC4 titanium alloy and oxygen free copper,kovar and other metals is generally not easy to achieve.In the experiment,by using vacuum brazing as the welding method and selecting Ti-Ni-Zr-Cu as solder,the test results of vacuum brazing TC4 titanium alloy with oxygen-free copper and kovar alloys were compared and analyzed.It is found that the leakage detection rates of brazed TC4 titanium alloy with oxygen-free copper and kovar alloys are better than 10^?11 torr.l/s,and the tensile strength of the welds are all above 150 MPa.
作者
郝振贻
严彪
HAO Zhenyi;YAN Biao(School of Materials Science and Engineering,Tongji University,Shanghai 201804,China;Key Laboratory of Infrared Imaging Materials and Detectors,Shanghai Institute of Technical Physics,Chinese Acadamy of Sciences,Shanghai 200083,China)
出处
《有色金属材料与工程》
CAS
2020年第1期32-36,共5页
Nonferrous Metal Materials and Engineering
基金
国家自然科学基金资助项目(61475179)
中国科学院青年创新促进会基金资助项目(2014215)。
关键词
TC4钛合金
真空钎焊
杜瓦薄壁冷指
TC4 titanium alloy
vacuum brazing
cold finger of thin-walled dewar
