爆炸焊接界面的结合机理

Bonding Mechanism of Interface in Explosive Welding

爆炸焊接界面虽然同时具有熔化、扩散和压力焊的特征 ,但熔化所产生的缝隙和”空洞物”大大削弱了界面的结合强度 ,在爆炸焊接过程中 ,要尽量消除熔化的影响 ,因此本文否定了爆炸焊接传统的熔焊机理 ;而扩散焊是压力焊的一种形式 ,同时扩散也只是界面由于高压产生结合的结果 ,而不是界面结合的原因 ,所以也不宜用扩散焊接解释爆炸焊接界面的成因。试验和理论研究表明 ,爆炸焊接是一种特殊的压力焊。为了获得没有熔化的微小波状的良好界面 ,爆炸焊接装药参数应取焊接窗口的下限。

Although the interface has the features of melt, 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 the conventional molten mechanism of explosive welding is negated. 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 explosive welding. The experiment and theory make it clearly that explosive welding is a special pressure one. In order to get good interface of no melt, explosive charge must be selected on the low limit of welding windows.