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工程有色金属材料电子束焊接性研究 总被引:2,自引:1,他引:1
简要介绍了电子束焊接加工技术的基本特点,着重对常用工程有色金属材料电子束的焊接性进行了分析与研究,提出了焊接过程中可能出现的焊缝缺陷及预防缺陷的必要措施。 相似文献
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电子束焊接是近年来飞速进步、蓬勃发展的一种先进连接技术,随着技术工艺的日益成熟,其在工业领域的竞争力也日渐增强,已为工业部门所广泛接受.文中综述了电子束焊接在高温钛合金、高温合金、难熔金属、金属间化合物等先进材料与各类互相固溶的、难以互溶的异种材料连接方面的研究现状,对国内外在焊接缺陷控制、焊接工艺优化、焊接机理研究等方面取得的典型研究成果进行了简要介绍,并从中概括总结了先进材料与异种材料电子束焊接的具体问题,归纳阐述了先进材料与异种材料电子束焊接中所采用的能量控制与冶金调控等特色技术方法. 相似文献
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电子束技术是难熔金属行业一项有效的处理方法,主要有电子束冷床熔炼、电子束悬浮区域熔炼、电子束物理气相沉积和电子束焊接等,本文研究了这4项技术在难熔金属行业的应用及4种处理设备的国内外研发水平。 相似文献
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研究了超低真空度(133.32~1 333.22 Pa)内变化时,对加速电压为100 k V,束流为60~80 m A的电子束形状影响。为解决超低真空焊接和局部真空电子束焊接时,电子束严重散射问题,提出了氦气保护电子束的焊接方法,对无保护和氦气保护下真空度对电子束形状的影响进行试验测试,对电子束焊接过程进行了分析。同轴氦气保护电子束焊接获得了满意的焊接接头。 相似文献
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综述了电子束焊接机理和匙孔动力学的研究成果。简要归纳了电子束深熔透过程起始、焊接、衰减三个典型阶段焊缝熔深及成形变化特征。回顾了前人利用电子束焊接过程产生的特有现象作为研究瞬态过程的依据 ,揭示了一些焊接瞬态特征以及提出的各种有关电子束深穿透焊接的物理模型。文章还进一步分析了电子束与金属相互作用过程中产生的内部信号如二次电子、X射线、可见光、红外线、特种声音等在研究中的不同作用和应用特点 ,同时也分析了X射线、红外线、超声波等外加信号在动态过程研究中的特点和应用前景 ;对比了外加信号和熔池内部信号与匙孔动力学研究方法的关系 ,并展望了电子束焊接机理和熔池动力学研究的方向。 相似文献
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PLC在电子束焊机中的应用 总被引:4,自引:1,他引:3
介绍了电子束焊机的组成及工作原理,对电子束焊机的控制原理和作用进行了分析,提出用三菱公司的FX系列要编程逻辑控制器对电子束焊机进行逻辑控制。结合电子束焊机对控制系统的要求及焊接工艺的需要,分别对控制软件伯艇和构成进行了详细说明。设备经过运行表明:控制系统的硬、软件功能完善,工作可靠。 相似文献
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In this paper, conditions for vertical weld defectless formation at horizontal electron-beam welding (EBW) are shown and power-complex selection methods to weld thick-walled constructions by electron beam are developed. Dependences to estimate EBW optimal conditions are obtained. 相似文献
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《中国有色金属学会会刊》2020,30(8):2156-2169
In order to maintain the structural consistency during the welding of precipitation hardened copper− chromium−zirconium (PH-CuCrZr) alloy components, electron beam welding (EBW) process was employed. Experimental study and numerical modeling of EBW process during welding of PH-CuCrZr alloy components were carried out. A 3D finite element model was developed to predict the output responses (bead penetration and bead width) as a function of EBW input parameters (beam current, acceleration voltage and weld speed). A combined circular and conical source with Gaussian heat distribution was used to model the deep penetration characteristic of the EBW process. Numerical modeling was carried out by developing user defined function in Ansys software. Numerical predictions were compared with the experimental results which had a good agreement with each other. The developed model can be used for parametric study in wide range of problems involving complex geometries which are to be welded using EBW process. The present work illustrates that the input current with a contribution of 44.56% and 81.13% is the most significant input parameter for the bead penetration and bead width, respectively. 相似文献
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Zhai Xiwei Chen Furong Bi Liangyan Zhang Chuanchen College of Materials Science Engineering Inner Mongolia University of Technology Hohhot China 《稀有金属材料与工程》2011,(Z4):68-73
The plates with 20mm thickness of 7A52 aluminum alloy were welded by electron beam welding and TANDEM welding with ER5356 filler,respectively.The microstructure and mechanical properties of the joints were investigated.The results showed that the microstructure of EBW metal was finer and tighter than TANDEM welding.The heat-affected zone of the EBW joint was narrower,its hardness was higher and the tensile strength improved obviously compared to TANDEM welding.Excellent quality control of the EBW joint was made without abnormal porosity,inclusions and micro-cracks.Therefore,the EBW joint of 7A52 aluminum alloy showed excellent performance. 相似文献
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Multiple factors and complicated coupling relationships exist in the weldment during EBW,in order to comprehend this process,a mathematical delineation method based on a main line was presented in this paper.Based on the main line,the complicated coupling relationships existing in EBW were reproduced by mathematical method.The calculational results were in well agreement with the experimental results.The mathematical delineation was an effective method to comprehend the features and essence of EBW. 相似文献
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