|Table of Contents|

Technical research on laser spot welding of overlap joint of niobium hafnium alloy nozzle(PDF)

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

Issue:
2018年02期
Page:
71-75
Research Field:
专论与综述
Publishing date:

Info

Title:
Technical research on laser spot welding of overlap joint of niobium hafnium alloy nozzle
Author(s):
ZHANG Yanqiao;  ZHANG Weiming
Xi'an Space Engine Company Limited, Xi'an 710100, China
Keywords:
niobium hafnium alloy;  laser spot welding;  welding parameter;  fracture behavior
PACS:
V261.8-34
DOI:
-
Abstract:
The strengthening ribs for a type of niobium hafnium alloy nozzle was welded by resistance welding in the past, but there were many problems in welding effect, such as low strength, low efficiency and high labour intensity. A study on laser spot welding of strengthening ribs for niobium hafnium alloy nozzle was carried out to improve welding quality. The influence of welding parameters on the mechanical properties, welding spot fusion characteristics and fracture behavior of the joints was studied. The results show that 0.7 mm diameter ring welding joint is the ideal spot welding structure, the fusion width is the key factor to determine the strength and fracture mode of the joint, and the welding parameters directly affects the fusion width. Therefore, When greater than 0.7 mm fusion width is realized by choosing the rational welding parameter, a higher strength welding joint and the not less than 8 000 N strength of the joint can be achieved. The laser spot welding has been successfully applied to production of niobium hafnium alloy nozzle.

References:

[1] 张博. 低碳钢激光点焊工艺特性与力学性能研究[D]. 哈尔滨:哈尔滨工业大学工学. 2007.
[2] 陈彦宾.现代激光焊接技术[M]北京:科学出版社出版,2005.
[3] 邹增大, 杜则裕, 田志凌, 等. 焊接手册(第三版)[M]. 北京:机械工业出版社, 2008.
[4] 刘泽敏, 王磊, 谢屹. 自锁阀激光焊接工艺研究[J]. 火箭推进, 2016,42(4):90-96.
LIU Zemin, WANG Lei, XIE Yi. Study on laser welding technology for latching valve [J]. Journal of rocket propulsion, 2016, 42(4): 90-96.
[5] 陶汪, 马轶男, 陈彦宾,等. LF6铝合金激光填丝点焊工艺研究[J]. 中国激光, 2013, 40,(11):112-119.
[6] 赵守辉. 铝合金激光点焊工艺优化[D]. 哈尔滨:哈尔滨工业大学工学. 2006.
[7] 吕涛. 钛合金舱体结构件激光点焊变形预测与焊接顺序优化[D]. 哈尔滨:哈尔滨工业大学工学. 2013.
[8] TORKAMANY M J, SABBAGHZADEH J, HAMEDI M J. Effect of laser welding mode on the microstructure and mechanical performance of dissimilar laser spot welds between low carbon and austenitic stainless steels [J]. Materials and design, 2012, 34: 666-672.
[9] 潘兆义,蔡刚,宋国新.铌铪合金推力室身部表面高温防护涂层的工艺技术研究[J]. 火箭推进, 2016,42(4):68-73.
PAN Zhaoyi, CAI Gang, SONG Guoxin. Research on thermal protection coating on body surface of Nb-Hf alloy thrust chamber [J]. Journal of rocket propulsion, 2016, 42(4): 68-73.
[10] 陶汪. 激光点焊焊点质量监测与控制研究[D]. 哈尔滨:哈尔滨工业大学. 2008.

Memo

Memo:
-
Last Update: 1900-01-01