表面处理和胶瘤对航天器结构用铝合金胶接剥离强度的影响  

Influence of surface treatment and fillet on the bonding and peeling strength of aluminum alloy used for spacecraft structure

作　　者：李莺歌 周占伟 曹克宁 李家峰 徐挺 黎昱 陈维强 LI Yingge;ZHOU Zhanwei;CAO Kening;LI Jiafeng;XU Ting;LI Yu;CHEN Weiqiang(Institute of Telecommunication and Navigation Satellites,China Academy of Space Technology,Beijing 100094;Beijing Spacecraft Manufactory Co.Ltd.,Beijing 100094)

机构地区：[1]中国空间技术研究院通信与导航卫星总体部,北京100094 [2]北京卫星制造厂有限公司,北京100094

出　　处：《航天器环境工程》2023年第2期197-202,共6页Spacecraft Environment Engineering

基　　金：国家国防科工局材料专项铝蜂窝芯一条龙项目。

摘　　要：针对工程实践中铝合金的胶接剥离强度数据差异大、胶接可靠性急需提升的现状,开展了常温常压环境下铝合金金属对金属,以及蜂窝夹层结构胶接剥离强度的测试验证,分析了试片表面处理工艺和试样周围有/无胶瘤对胶接剥离强度的影响。结果表明,在试样周围保留0.5~1 mm宽的胶瘤有利于提高试样的剥离强度;仅用有机溶剂清洁试片胶接面,试样的剥离强度最低且数据离散性大;对试片胶接面进行砂纸打磨后再清洁,试样的剥离强度有较大提高,但数据离散性仍然偏大;对试片胶接面进行磷酸阳极化氧化处理可使试样的剥离强度提高最多。所得结果可为胶接工艺优化提供参考。In view of the significant data discrepancy among the bonding and peeling strength of aluminum alloy in engineering practices,and the fact that the bonding reliability needs to be improved urgently,testing and verification of bonding and peeling strength of metal to metal and honeycomb sandwich structure for aluminum alloy under normal temperature and pressure were carried out.The influence of surface treatment processes of test samples and whether there was adhesive fillet around the sample on the bonding and peeling strength were analyzed.The results show that keeping a fillet of 0.5 mm to 1 mm wide around the sample was conducible to improve the peeling strength of the sample.The bonding surface of test sample that was only cleaned by organic solvent had the lowest peeling strength and the data dispersion was large.After the bonding surface of test sample were sanded and cleaned,the peeling strength of sample was greatly improved,but the data dispersion was still large.Phosphoric acid anodizing treatment on the bonding surface of the test sample could improve the peeling strength of the sample to the maximum extent.The obtained results may provide reference for the optimization of bonding process.

关 键 词：铝合金 胶接 表面处理 胶瘤 剥离强度 碱洗 磷酸阳极氧化 

分 类 号：TB302.4[一般工业技术—材料科学与工程] V414.7[航空宇航科学与技术—航空宇航推进理论与工程]