共查询到18条相似文献,搜索用时 187 毫秒
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针对实际生产中在爆炸焊接窗口内取值时因为所取参数不同而导致生产的复合板结合强度差异较大这一现状,通过对SUS304不锈钢/Q345R碳钢爆炸焊接窗口内不同工艺条件得到的复合板进行剪切强度测试及金相分析,得到界面结合强度与界面波形的关系以及两者随工艺参数的变化规律,找到窗口内最佳的工艺参数,以提高爆炸焊接复合板质量以及生产效益。研究表明:界面波形的波长和振幅随着装药量的增加而增大,随基复板间距的增加先增大后减小。爆炸焊接窗口内最佳工艺参数取值范围与复板厚度有关。复板为薄板(3mm)时,取得最佳结合强度时界面波形波长为1250μm左右,振幅为200μm左右,对应的最佳装药质量比为1.02,基复板间距为8mm,取值比理论最佳值偏高;复板为厚板(6mm)时,取得最佳结合强度时界面波形波长为900岫,左右,振幅为100μm左右,对应的最佳装药质量比为0.45,基复板间距为14mm,取值靠近下限。当界面波长与振幅相同时,复板为薄板的结合强度要高于厚板。 相似文献
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为探讨钛/钢爆炸焊接界面波形的形成过程和缺陷组织的形成机理,以台阶型基板爆炸焊接装置为例,选取厚度为2 mm的钛板和钢板以5、7、9、11 mm为间距进行爆炸焊接实验,并采用Autodyn动力学软件进行仿真模拟。将采用的光滑粒子动力学(SPH)数值模拟结果与实验结果作对比,观察焊接界面电镜扫描(SEM)图片中的旋涡状结晶熔池和碰撞粒子的速度矢量图。研究表明:光滑粒子动力学数值模拟方法适用于模拟爆炸焊接等金属碰撞接触的大变形行为;爆炸焊接实验中出现的界面波形的形成原因可用碰撞局部金属流体的相互侵彻理论来解释;基板和复板碰撞处的金属涡流是焊接界面形成缺陷组织的主要原因。 相似文献
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为了研究TiNi合金/Q235钢爆炸复合板界面微观结构及形成机理,分别以Ti质量分数50.8%的TiNi合金板、Q235钢板为复板和基板,利用爆炸焊接技术制备了TiNi合金/Q235钢层状复合材料。通过SEM和EDS检测手段对结合界面的微观结构了进行分析,并结合光滑粒子流体动力学(SPH)数值模拟方法,揭示其演化过程。同时,利用拉伸和压剪实验,测试了界面的力学性能。结果表明,TiNi合金/Q235钢爆炸复合板界面呈现规则的波状结合,界面拉伸强度达到683 MPa,压剪强度达到291 MPa。数值模拟分析显示,碰撞点离开后,界面熔融物质仍具有较高运动速度,与受主射流裹挟和高压区挤压而侵入界面的熔融金属流相向运动,发生强烈的圆周运动和机械搅拌,最终形成涡旋区。 相似文献
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为了解决现有金属复合板爆炸焊接技术中存在装药结构能量利用率低、环境危害大、安全隐患突出等现实问题,对爆炸焊接装药结构进行了研究,设计出一种简式密封装药工艺,即一种节能型爆炸焊接复合板生产方法:在普通型铺设炸药之上,放置厚度2 mm左右的隔离板,隔离板之上铺设高度为10~12 mm的金刚砂。为了验证节能型爆炸焊接与普通型爆炸焊接金属复合板的力学性能差异,分别采用普通型爆炸焊接工艺和节能型爆炸焊接工艺进行了试验研究。采用节能型爆炸焊接技术生产的金属复合板,经无损检测、力学性能试验表明,其结合强度、复合率、机械性能等指标均达到或超过了国家标准GB/T 8165、行业标准NB/T 47002的技术要求。并且相比较于普通型爆炸焊接工艺,仅仅采用炸药表面覆盖物的方法,就可实现节能1/3的目的,在炸药使用量减少30%的情况下,依然得到了高于国家及行业标准规定的性能指标。实验结果表明:采用节能型爆炸焊接工艺与普通型爆炸焊接工艺生产的复合板,力学性能几乎相同,都能满足大型化工装备制造领域的需求。因此,采用节能型爆炸焊接复合板生产工艺,实现了简洁高效、安全可靠,节能降耗之目的。 相似文献
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《材料与设计》2015
In order to explore a new method for the explosive welding of aluminum alloy to steel, a 5083 aluminum alloy plate and a Q345 steel plate with dovetail grooves were respectively employed as the flyer and base plates. The parameters adopted in the explosive welding experiment were close to the lower limit of weldable window of 5083 aluminum alloy to Q345 steel. The bonding properties of 5083/Q345 clad plate were studied through mechanical performance tests and microstructure observations. The results showed that the aluminum alloy and steel plates were welded under the actions of metallurgical bonding and meshing of dovetail grooves. The tensile shear strength of 5083/Q345 clad plate met the requirements of the bonding strength of Al/Fe clad plate. The interfaces between aluminum alloy and the upper and lower surfaces of dovetail grooves were mainly welded through direct bonding, and discontinuous molten zone emerged in the local region; while the interface between aluminum alloy and the inclined surface of dovetail grooves was bonded by continuous molten layer. The brittle intermetallic compounds FeAl2 and Al5Fe2 were generated at the bonding interfaces of 5083/Q345 clad plate. The fracture surface of the tensile specimen exhibited ductile and quasi-cleavage fractures. 相似文献
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The titanium–steel clad plates were prepared by vacuum roll cladding. Ti–Fe compounds and TiC were observed at different cooling rates after rolling. Optical microscopy, electron microprobe analyser, X-ray diffraction and shear test studies were carried out to study the effect of Ti–Fe compounds and TiC on the ultimate microstructure and mechanical properties of titanium–steel clad plates. At a cooling rate of 6.2°C/min, TiC and Ti–Fe compounds seriously impacted the mechanical properties of the clad plate. At a cooling rate of 1.8°C/min, the thickness of the TiC layer was optimal much that the maximum shear strength of 296?MPa was obtained. At a cooling rate of 0.6°C/min, the thickness of the TiC layer was relatively thick, which affected the mechanical properties of clad plates. 相似文献
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高锰钢-碳钢复合板的制造和应用 总被引:1,自引:0,他引:1
介绍了一种高锰钢与结构钢的爆炸焊接工艺,包括表面处理方法、表面处理参数及条件、所采用的炸药和复合板的性能、爆炸焊用材料的准备。进行了成品复板(复合板)的质量检验,给出了该技术的应用实例。 相似文献
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对于钛-钢复合板而言,钛自身的焊接性有若干显著的特点,而且钛和钢熔焊的焊缝会产生脆裂,进一步增加了钛-钢复合板中钛复材焊接的复杂性。本文分析了电厂烟囱用钛-钢复合板钛复材焊接缺陷的产生原因,并提出了相应的预防措施。 相似文献
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采用爆炸焊接方法制作双相不锈钢2205-Q345R复合板,需将复层2205进行拼焊,以满足不同尺寸要求,未复合区需进行补焊.根据双相不锈钢2205-Q345R复合板的焊接性,对双相不锈钢2205拼焊和2205-Q345R复合板未复合区补焊工艺进行了试验研究,结果表明:焊接接头各项性能均能满足相关指标要求. 相似文献
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Titanium-Clad Plates The article deals with aspects as well as the processing and service properties of large clad plates. The most important characteristics of explosion-clad steel are discussed. Results of tests performed on high-strength grade 2 titanium are also presented. Large plates with titanium cladding thicknesses of 1.5–3.0 mm are produced by means of a new method comprising the hot rolling of explosion-clad semi-finished material. By means of hot and cold forming, corrosion resistance tests, and successfull welding trials it is shown that the new clad plate completely satisfies further processing requirements. 相似文献