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[1]赵鼎,刘琳,孙龙飞.钛合金夹层结构扩散钎焊工艺研究[J].火箭推进,2018,44(01):67-74.
　ZHAO Ding,LIU Lin,SUN Longfei.Study on diffusion brazing process for titanium alloy sandwich structure[J].Journal of Rocket Propulsion,2018,44(01):67-74.

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钛合金夹层结构扩散钎焊工艺研究

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V] 卷: 44 期数: 2018年01期页码: 67-74 栏目: 工艺与材料出版日期: 2018-02-28

Title:: Study on diffusion brazing process for titanium alloy sandwich structure

文章编号:: 1672-9374(2018)01-0067-08

作者:: 赵鼎¹; 刘琳²; 孙龙飞²; 1.西北工业大学航天学院,陕西西安 710072; 2.西安航天发动机有限公司,陕西西安 710100

Author(s):: ZHAO Ding¹; LIU Lin²; SUN Longfei²; 1.Department of Aerospace, Northwestern Polytechnical University, Xi'an 710072, China; 2.Xi'an Space Engine Company Limited, Xi'an 710100, China

关键词:: 钛合金TC4; 夹层结构; 数值模拟; 扩散钎焊

Keywords:: TC4 titanium alloy; sandwich structure; numeral simulation; diffusion brazing

分类号:: V463-34

文献标志码:: A

摘要:: 利用Dictra动力学软件对中间层Cu元素在TC4钛合金扩散钎焊界面附近的浓度分布规律进行了模拟研究,获得了中间层厚度、连接温度和保温时间对界面元素扩散距离的影响趋势,结合夹层结构零件的焊接试验,验证了扩散模拟计算的正确性。结果表明,连接温度对钛合金夹层结构扩散钎焊的接头强度影响最大,其次为保温时间,中间层厚度对接头强度无显著影响。针对钛合金夹层结构零件,结合焊缝微观组织分析可知,较优的扩散钎焊工艺参数应为:连接温度940 ℃,保温时间50 min,中间层厚度为20 μm,达到了产品的使用要求。

Abstract:: The Cu interlayer concentration distribution law near TC4 titanium alloy diffusion brazing interface was simulated by using dynamic software Dictra.The influence trend of the interlayer thickness, bonding temperature and temperature holding time on the diffusion distance of interlayer was obtained, which provided a theoretical basis for the design of process parameters.The correctness of the diffusion analog computation was verified in combination with welding experiment of sandwich structure parts.The results show that the bonding temperature has the greatest influence on the joint strength of titanium alloy sandwich structure diffusion brazing, and then the holding time follows but the interlayer thickness has no influence on the joint strength.For the titanium sandwich structure, the microstructure analysis result of welded joints reveals that the appropriate process of the diffusion brazing should be bonding temperature of 940 ℃, holding time of 50 min and the interlayer thickness of 20μm, which meets the requirements of product.

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备注/Memo

收稿日期:2017-07-10; 修回日期:2017-08-30 作者简介: 赵鼎(1986—),男,工程师,研究领域为液体火箭发动机焊接工艺

更新日期/Last Update: 1900-01-01