中文摘要：

为由直接连续的扔准备比 12 公里没有大的外部直径的合成的杆提供理论基础和实际指导，铅和锡的低融化点材料被选择准备有压核心的空气的 8 公里充满了连续的扔的 12 公里和内部直径处理的外部直径的合成的杆。由三个因素和三个层次组成的直角的测试被设计调查融化影响合成的杆的性能的铅温度，连续的扔速度和空气压力的参数。结果证明那融化的铅温度是影响固体 / 液体的接口地点的最重要的因素；连续的扔速度是影响表面质量和铅和听的最重要的因素内部散开的数量；空气压力能显然改进表面质量并且使杆容易抽出，但是当空气压力在 0.03 MPa 上面时，表面质量不能得到明显的改进。合成的杆有优秀表面优秀的、明显的中间的层，在融化 375 的铅温度的条件下面的甚至厚的穿着、冶金的结合的接口

英文摘要：

To provide theoretical basis and practical guidance for preparing composite rods of external diameter no larger than 12 mm by directly continuous casting, low melting point materials of lead and tin were selected to prepare composite rods of external diameter 12 mm and inner diameter 8 mm with air pressing core filled continuous casting process. The orthogonal tests consisting of three factors and three levels were designed to investigate the parameters of melting lead temperature, continuous casting speed and air pressure that affect the performance of the composite rods. The results show that melting lead temperature is the most important factor that influences the solid/liquid interface location; continuous casting speed is the most important factor that influences the surface quality and lead and tin inter-diffusion amount; air pressure can improve the surface quality obviously and make the rods easily drawn out, but the surface quality cannot get obvious improvement when the air pressure is above 0.03 MPa. The composite rods have excellent surface quality, obvious intermediate layer, even thick clad, and metallurgical bonding interface under the condition of melting lead temperature of 375 ~C, continuous casting speed of 10 mm/min, and air pressure of 0.03 MPa.