|Table of Contents|

Study on power threshold of laser welding for space engine(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2018年04期
Page:
40-46
Research Field:
研究与设计
Publishing date:

Info

Title:
Study on power threshold of laser welding for space engine
Author(s):
SONG Fan;  ZHANG Yiling;  LIN Jiawei;  ZHOU Yuhao
Shanghai Institute of Space Propulsion, Shanghai 201112, China
Keywords:
laser penetration welding;  key hole;  power threshold;  technological parameter;  laser beam quality
PACS:
V463-34
DOI:
-
Abstract:
In this paper, the power threshold of laser welding is studied for the simulation parts of a space engine. The results show that the welding speed, defocusing amount, beam quality, protective gas are all related to the power threshold. The power threshold is positively related to the welding speed and the defocusing amount. The influence of laser beam quality on the power threshold needs to be determined by the measured values of welding test. The composition of the protective gas has no effect on the power threshold of YAG laser welding, but their waftage mode and flow rate have obvious effects on the power threshold. On the basis of the theoretical research and technological test on the power threshold of laser welding for space engine, the optimal process specification of laser welding is obtained. With this process specification, the welded products have passed the flight test, which indicates that the research result on the power threshold of laser welding for space engine is correct, reasonable and effective.

References:

[1] 陈彦宾.现代激光焊接技术[M].北京:科学出版社,2005.
[2] 庞盛永.激光深熔焊接瞬态小孔和运动熔池行为及相关机理研究[D].武汉:华中科技大学,2011.
[3] 陈涛.脉冲激光焊接的数学模型[J].焊接学报,2001(2):9-14.
[4] 韩宁.激光深熔焊接阈值特性研究[D].北京:北京工业大学,2007.
[5] 陈虹.激光光束质量对光束传输聚焦和加工质量的影响[D].北京:北京工业大学,2006.
[6] 金湘中.激光深熔焊接小孔效应的理论和试验研究[D].长沙:湖南大学,2002.
[7] 程元勇.激光深熔焊接铝合金孔内等离子体的反韧致辐射吸收研究[D].长沙:湖南大学,2012.
[8] 李建强.304不锈钢激光焊接的建模与仿真[D].天津:天津大学,2004.
[9] 肖荣诗.CO2激光深熔焊接光致等离子体的行为研究[D].北京:北京工业大学,1997.
[10] 段爱琴.CO2激光深熔焊不稳定穿孔过程特征与相关机理研究[D].武汉:华中科技大学,2006.
[11] 田英超, 张祎玲,曹明. 1Cr18Ni9Ti脉冲激光焊接工艺研究[J].火箭推进,2014,40(3):73-76.
TIAN Yingchao, ZHANG Yiling,CAO Ming. Research on pulsed laser welding technology of 1Cr18Ni9Ti[J].Journal of rocket propulsion,2014,40(3):73-76.

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Last Update: 1900-01-01