共查询到19条相似文献,搜索用时 62 毫秒
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使用SPH-FEM耦合算法对钛-钢、钢-不锈钢、铜-钢、钛-铝4种常见爆炸复合组合进行了数值模拟,理论分析了材料JC强度方程和SG强度方程的适用应变率范围。探讨了爆炸焊接静态参数基复板厚度和动态参数碰撞速度、动态弯折角对界面温度和压力的影响,借助数值模拟手段研究了界面波形形貌,漩涡和少量飞溅熔化块的生长机理。结果表明,随着复板厚度和碰撞速度的增加,界面温度、压力和波形尺寸明显增加,动态弯折角和基板厚度的改变并不能影响界面温度,界面波形生长遵循着“主逆次顺”运动规律。 相似文献
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爆炸焊接窗口是获得良好结合质量的重要方法,计算的理论模型和参数选择对结果至关重要. 从爆炸焊接参数出发,通过分析爆炸焊接窗口边界公式的发展历程、理论假设和参数选择,总结得到方便使用的窗口计算公式. 将其应用到钛/铝焊接中,分析了钛与不同牌号铝合金的焊接方式,预测了不同装药比时焊接界面的质量. 结果表明,随着铝合金硬度的升高,可焊窗口逐渐减小. 当焊接参数位于窗口中部时,界面成小波状,结合质量好;焊接参数接近窗口上限时,界面成大波状,存在大量微观缺陷.焊接窗口是重要的研究手段,能够较好的指导生产实践. 相似文献
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爆炸焊接窗口是获得良好结合质量的重要方法,计算的理论模型和参数选择对结果至关重要. 从爆炸焊接参数出发,通过分析爆炸焊接窗口边界公式的发展历程、理论假设和参数选择,总结得到方便使用的窗口计算公式. 将其应用到钛/铝焊接中,分析了钛与不同牌号铝合金的焊接方式,预测了不同装药比时焊接界面的质量. 结果表明,随着铝合金硬度的升高,可焊窗口逐渐减小. 当焊接参数位于窗口中部时,界面成小波状,结合质量好;焊接参数接近窗口上限时,界面成大波状,存在大量微观缺陷.焊接窗口是重要的研究手段,能够较好的指导生产实践. 相似文献
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C.G. Shi Y.H. Wang L.G. Cai C.H. ZhouEngineering Institute of Engineering Corps PLA University of Science Technology Nanjing China 《金属学报(英文版)》2003,16(6):531-537
There are four new achievements of this work on the theory and technology of explosive welding.(1) It has been found and defined three kinds of bonding interfaces: big wavy, small wavy and micro wavy, and the micro wavy interface is the best. In a cladding plate, it is for the first time to find that the form of interface presents regular distribution.(2) Although the interface has the features of melt, diffusion and pressure welding in the mean time, the seam and "hole" brought by the melt weaken the bonding strength of interface greatly, and the effect of melt on interface must be eliminated in explosive welding, so explosive welding is not a melt weld. The diffusion welding is a kind of form of pressure welding, and the diffusion is not the reason of the bonding of interface but the result of interface high pressure. So the diffusion welding cannot also explain the bonding mechanism of it. The experiment and theory make clear that explosive welding is a special pressure one.(3) To get good interface 相似文献
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GAO Juxian ZHANG Ke ZHENG Zhemin Institute of Mechanics Academia Sinica Beijing China 《金属学报(英文版)》1991,4(9):234-237
Two-dimension consolidation under the cylindrical converging shock wave has been studied.The major parameters influenced on the explosive consolidation quality are the specificenergy,detonation pressure and specific impulse.It seems to be favourable to improving con-solidation quality by a lower but slightly higher than critical detonation pressure and a highspecific impulse. 相似文献
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GAO Juxian ZHANG Ke ZHENG Zhemin Institute of Mechanics Academia Sinica Beijing China GAO Juxian Associate Professor Institute of Mechanics Academia Sinica Beijing China 《金属学报(英文版)》1990,3(9):234-237
Two-dimension consolidation under the cylindrical converging shock wave has been studied.The major parameters influenced on the explosive consolidation quality are the specificenergy,detonation pressure and specific impulse.It seems to be favourable to improving con-solidation quality by a lower but slightly higher than critical detonation pressure and a highspecific impulse. 相似文献
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热处理对铝-钢爆炸复合板交界区的影响 总被引:1,自引:0,他引:1
研究了铝-钢爆炸复合板交界区经热处理(300℃,350℃,400℃,450℃)×20min后的组织和性能.结果表明,爆炸状态下,Fe-Cu-Al界面发生合金元素的扩散,形成了合金元素的成分过渡区.其中,Cu-Al交界处的扩散较为明显,合金元素扩散的距离较长,Al元素的扩散能力较强,但未见析出物.450℃×20 min热处理后,Cu-Al交界区有明显的析出物;爆炸使Cu-Al界面产生了明显的硬化效应,随着热处理温度的提高,硬度峰值增加,350℃后的热处理,硬度峰值变化不明显;爆炸状态下,Cu-Al界面的剪切强度满足了使用性能的要求. 相似文献
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