共查询到19条相似文献,搜索用时 62 毫秒
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一个异型件——打桩机滑块的爆炸焊接实验研究 总被引:1,自引:0,他引:1
文章详细叙述了一个异型件-打桩机滑块的爆炸焊接实验研究过程。尝试了几种复板与基板的安装方法,分析了实验安装失败与成功的原因。其中的一些经验可供类似的研究参考。 相似文献
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爆炸焊接条件下炸药爆速的探针法测定 总被引:3,自引:0,他引:3
用探针法测量了几种混合炸药的爆速 ,绘制了它们沿爆轰方向的分布曲线 ,分析和讨论了试验结果。指出 ,炸药的爆轰和它的传播 (爆速 )有一个发生、发展、持续和消亡的过程 ,研究这个过程对于爆炸焊接来说有重要的理论和实际意义 相似文献
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爆炸焊接专用炸药实验研究 总被引:5,自引:0,他引:5
以2#岩石硝铵炸药为主体,通过加入一定比例的食盐、膨胀珍珠岩配制成爆速可调的SE型爆炸焊接专用炸药,其加工方便、成本较低,最低爆速为2048m/s。经铜-钢爆炸焊接实验表明,该炸药具有爆速低、爆轰稳定、能量适中特点,较好地避免了猛炸药焊接时所出现的问题。研究、开发爆速更低、能够适应管状物体焊接需要的可塑性炸药,是有待进一步研究的课题。 相似文献
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本文通过对钛与钢熔焊接头的微区分析,指出这两种金属焊接性差的主要原因在于焊缝中产生脆性的金属间化合物,以致焊缝在焊接应力作用下即行开裂。按照钛复合钢板焊接的特点,通过大量试验研究,作者提出了合理的钛复合钢板焊接接头型式,这种接头型式已用于制作目前我国最大的年产30方吨盐的钛复合钢板精盐设备。 相似文献
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Bogumi? Wronka 《International Journal of Impact Engineering》2011,38(5):309-313
The basic defects occuring in explosive clad plates were properly systemized and the reasons of their formation were explained. Cases of cracks and delaminations in explosive clad plates were examined in this work. Various values of tensile stresses coming from loading and unloading waves were analysed, as they were the main reason of defects. The defects were connected with properties of welded materials in the joint area and beyond it. Some practical aspects of this process were shown as well. 相似文献
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Investigation of explosive welding parameters and their effects on microhardness and shear strength 总被引:2,自引:0,他引:2
The aim of this study was to investigate the strength of explosive welded metals with the same chemical compositions. Different welding interfaces (straight, wavy and continuous solidified-melted) were used with changing explosive welding parameters [stand-off distance (s), explosive loading (R) and anvils]. Joined metals were investigated under heat-treated and untreated conditions. Results on the microstructure, microhardness, tensile shear strength and bending tests are reported. According to the experimental results, the effect of the anvil on the explosive welding process was only the joining or not-joining performance. It was shown that the bonding interface changed from a straight to a wavy structure when the explosive loading and stand-off distance were increased. For wavy interfaces, when the explosive loading was increased the wavy length and amplitude increased. Results of tensile shear and bending tests showed that heat-treated specimens have more strength than untreated samples. According to tensile shear test results, straight and wavy interfaces had similar strength. In addition, in bending tests of untreated specimens it was shown that the bending zone had some cracks. 相似文献
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The aim of this research is to study the influence of explosive characteristics on the weld interfaces of stainless steel AISI 304L to low alloy steel 51CrV4 in a cylindrical configuration. The effect of ammonium nitrate-based emulsion, sensitized with different quantities and types of sensitizing agents (hollow glass microballoons or expanded polystyrene spheres) and Ammonium Nitrate Fuel Oil (ANFO) explosives on the interface characteristics is analyzed. Research showed that the type of explosive and the type and proportion of explosive sensitizers affect the main welding parameters, particularly collision point velocity. The morphology of the wavy weld interfaces, chiefly the amplitude and length of the waves, is affected both by the impact velocity and the type and particle size of the explosive sensitizers, and increases with particle size. All the weld interfaces, except welds done with ANFO, displayed localized melted and solidified regions, whose chemical composition resulted from the contribution of both flyer and base metal. 相似文献
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Explosive welding involves detonation of explosive, interactions of fluid-structure and plastic deformations of metal plates at the instant of the explosion. Conventional mesh-based methods such as the finite element method (FEM) and finite difference method (FDM), are limited in simulation of the explosive welding when mesh distortion and interaction of different materials occur. In order to describe process of the explosive welding and accurately predict physical parameters for the explosive welding, numerical simulation of the explosive welding which involves multi-physical phenomenon is performed by using material point method (MPM). Not only can major physical phenomena of explosion impact be well captured, but also some important technical parameters for the explosive welding can be attained based on the MPM simulation. Through the comparison with the experimental results, it is shown that the MPM is a robust tool in simulation of the explosive welding. 相似文献
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Seyed Hadi Ghaderi Kazuyuki Hokamoto Masahiro Fujita 《International Journal of Impact Engineering》2009
The problem of projection of a flyer plate with a traveling distributed load and subsequent collision of it to a base plate, as applied to explosive welding, is addressed in this paper. A semi-infinite solid-perfectly plastic beam is employed to model the flyer plate subject to two transverse pressure profiles, traveling at constant speed on its top and bottom surfaces, which represent the explosion and collision loads, respectively. A steady state deformation process is considered and the analysis is developed for the pure bending and combined shear and bending deformation conditions. It follows from analysis that two plastic bending hinges form ahead and at the rear end of each pressure profile and travel at constant velocity. Furthermore, when the width of the pressure is small, the shearing deformation region is generated within the loaded area. The state of the deformation in the collision stage in contrast to the propulsion stage is discussed. 相似文献
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铂/钛复合板轧制工艺及结合机理研究 总被引:1,自引:0,他引:1
针对海港码头电化学保护用铂/钛阳极材料的特点,讨论了铂/钛爆炸复合板轧制以及经轧制后的组织、成份分布和性能的变化,以便为这种复合材料的实际应用提供依据。 相似文献