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以不可压缩理想流体对称碰撞模型对金属粉末爆炸烧结中由微爆炸焊接引起的颗粒界面附近沉积的能量进行了分析,在考虑热传导效应的基础上推导出了焊接流场中二维形式的能量方程并用有限差分法对其进行了求解,在考虑冲击绝热压缩贡献的基础上计算出了焊接流场中的温度分布。结果表明:在适当的冲击压力下,爆炸粉末烧结过程中微爆炸焊接引起的焊接界面附近的温升将达到材料的熔点而引起材料熔化,颗粒熔化部分仅为其表面很薄的一层;爆炸焊接引起的材料温升随来流速度和碰撞角度的增大而升高。
In the incompressible ideal fluid symmetry collision model, the energy deposited near the particle interface caused by micro-explosion welding in metal powder explosion sintering was analyzed. Based on the heat conduction effect, the two-dimensional energy equation in the welding flow field was deduced The finite difference method was used to solve the problem. The temperature distribution in the welding flow field was calculated based on the contribution of shock adiabatic compression. The results show that under appropriate impact pressure, the temperature rise near the welding interface caused by the micro-explosion welding during the sintering of the explosive powder will reach the melting point of the material and cause the material to melt. The melting part of the particles is only a thin layer on the surface. The material temperature rise caused by welding increases with the increase of the velocity of flow and the collision angle.