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多钎缝喷注器真空钎焊工艺
王文平1,张志伟1,武胜勇1,贾春林1,张汝俊1
北京控制工程研究所,北京 100190
摘要:
针对不同部位多条钎焊缝一次钎焊成型,开展采用BNi-2钎料进行喷注器真空钎焊工艺方法的实验研究。分析了表面洁净度、钎焊温度及钎缝间隙对喷注器密封性的影响。结果表明:钎缝间隙对由高温合金与不锈钢两种材料组成喷注体钎焊接头的密封性有显著影响。合理的钎缝装配间隙为10~15 μm,此间隙使钎缝中的钎着率>90%,并得到了内外部质量、密封性优良的接头。
关键词:  喷注器  多钎缝  真空钎焊  钎缝间隙
DOI:10.12044/j.issn.1007-2330.2019.05.019
分类号:TG454
基金项目:
Vacuum Brazing Technology of Multi-Brazing Injector
WANG Wenping1,ZHANG Zhiwei1,WU Shengyong1,JIA Chunlin1,ZHANG Rujun1
Beijing Institute of Control Engineering,Beijing 100190
Abstract:
In order to study the one-shot welding of multiple brazing seams in different parts of the injector,an experimental study on the vacuum brazing process of the injector by using BNi-2 solder was carried out.The effects of surface cleaness, brazing temperature and brazing gap on the sealing performance of the injector were analyzed.The results show that the gaps between brazing seams have an important influence on the sealing performance of the brazed joints of the injection body composed of high temperature alloy and stainless steel.A reasonable brazing seam assembly gap is 10 to 15 μm,and this gap makes the filling rate of the brazing seam more than 90%,and obtains a joint with excellent internal and external quality and sealing property is obtained.
Key words:  Injection  Multi-brazing seam  Vacuum brazing  Brazing gap