本文選題：行波管 + 陰極組件　； 參考：《真空科學與技術學報》2017年09期

【摘要】：對行波管陰極鉬筒和鉭支撐筒的焊接材料及焊接工藝進行了研究,并用數值模擬方法對焊接結構的殘余應力進行了分析,獲得焊接殘余應力值及其分布,并與試驗值進行了比對,仿真結果與試驗結果一致。同時將殘余應力結果作為預應力加載到行波管陰極組件上,分析了其對結構強度的影響。結果表明:焊接殘余應力使陰極組件結構在實際工作中的應力值增大且應力分布發(fā)生了變化,在殘余應力的影響下,鉭支撐筒在高溫工作時的應力由332變化為412 MPa,增幅達24%,而且最大應力的位置也由鉭爪內表面轉移到鉭爪拐角處。而六個鉭支撐爪子的外表面(焊接處)由于殘余應力最大,該處應力值也由101增加到250 MPa,增幅高達150%。因此陰極組件中鉭支撐筒與陰極鉬筒的焊接處很容易因應力值過大而失效,需要對焊接處殘余應力進行消除和控制并對結構進行加固設計。
[Abstract]:The welding materials and welding process of the cathode molybdenum tube and the tantalum support tube of the traveling wave tube are studied. The residual stress of the welded structure is analyzed by numerical simulation method, and the welding residual stress value and its distribution are obtained. The simulation results are in agreement with the experimental results. At the same time, the effect of residual stress on the structure strength is analyzed by loading the residual stress as the prestressing force on the TWT cathode assembly. The results show that the welding residual stress increases the stress value and the stress distribution of the cathode assembly structure in practice, and under the influence of the residual stress, The stress of tantalum support tube changed from 332 to 412 MPA at high temperature, which increased by 24%, and the position of the maximum stress was transferred from the inner surface of tantalum claw to the corner of tantalum claw. The external surface of the six tantalum-supported paws (welding site) is increased from 101 to 250 MPA due to the maximum residual stress, an increase of 150 MPA. Therefore, the welding of tantalum support tube and cathode molybdenum tube in cathode assembly is easy to fail because of the excessive stress value, so it is necessary to eliminate and control the residual stress in the welding site and to strengthen the structure.
【作者單位】： 華南理工大學電子與信息學院;工業(yè)和信息化部電子第五研究所電子元器件可靠性物理及其應用技術重點實驗室;
【分類號】：TN124

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1 陳江華;焊接殘余應力應變場全息圖象的計算機處理研究[D];西北工業(yè)大學;2001年

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本文編號：1932274