SHI Suxia, ZUO Mou, LIU Xueli, et al.Vacuum brazing technology of seal ring composed of martensitic stainless steel and aluminum bronze[J].Electric Welding Machine, 2022, 52(01): 103-108.
SHI Suxia, ZUO Mou, LIU Xueli, et al.Vacuum brazing technology of seal ring composed of martensitic stainless steel and aluminum bronze[J].Electric Welding Machine, 2022, 52(01): 103-108. DOI: 10.7512/j.issn.1001-2303.2022.01.13.
Vacuum Brazing Technology of Seal Ring Composed of Martensitic Stainless Steel and Aluminum Bronze
The sealing ring structure of an aero engine is connected by the mounting edge of material 1Cr17Ni2 and the ring of material QAL7 through vacuum brazing. After the aero engine test run, the qualified brazing seam processed by the original process appeared the phenomenon of brazing crack, which seriously restricted the development progress. In this paper, vacuum brazing technology of sealing ring is improved by using simulated parts, and HBAg72CuNiLi eutectic filler metal is used. The brazing gap is adjusted to 0.18~0.20 mm at room temperature, the brazing gap is ensured by turning the external diameter of bronze ring according to the size of the mounting edge, and the weld cracking during brazing is prevented from increasing the brazing equipment. The results show that the brazing seam has uniform surface, smooth transition and no defects, which meets the quality requirements. The water immersion ultrasonic testing is used instead of X-ray inspection to detect the brazing seam, and the detection results are consistent with the metallographic detection results. The parts brazed by the new technology pass the test run and the problem of cracking of brazing seam is solved.
关键词
封严环真空钎焊钎焊间隙水浸超声波检测
Keywords
seal ringvacuum brazingbrazing gapultrasonic testing in water immersion
references
徐念.燃烧室机匣真空钎焊技术研究[J].金属加工(热加工),2014(6):85-86.
XU N. Study on vacuum brazing Technology of combustor case[J]. Welding and Cutting, 2014(6):85-86.
JIANG K,WANG Y,ZHANG T,et al. Welding procedure design and property study on vacuum brazing of copper-stainless steel in nuclear island cooling system[J]. Electric Welding Machine, 2019, 49(7):31-35.
刘新强,郑欣,李佳,等.扩压器真空钎焊工艺[J].航空制造技术,2015(5):93-94.
LIU X Q,ZHENG X,LI J,et al. Vacuum Brazing Process of Diffuser[J].Aeronautical Manufacturing Technology, 2015(5):93-94.
SHI H J, YAN J Z, LI N,et al .Study on Microstructure and Performance of FeCrMo/MnCu Damping AlloyBrazed Joint by Vacuum Brazing Using Ag-Cu Filler Metal[J],Hot Working Technology,2019,48(13):50-53.
张启运,庄鸿寿. 钎焊手册[M]. 北京:机械工业出版社,2017.
Zhang Q Y,Zhuang H S.Handbook of Brazing and Soldering[M].Beijing:China Machine Press,2017.