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发明公开
CN1739890A 铝基复合材料的反重力真空吸铸制备方法 失效 - 权利终止

铝基复合材料的反重力真空吸铸制备方法
摘要：
一种铸造技术领域的铝基复合材料的反重力真空吸铸制备方法。步骤为：(1)在惰性气体保护下，复合材料在坩锅中加热熔化然后搅拌；(2)关闭惰性气体，合上中隔板，抽真空精炼；(3)真空精炼结束后，打开惰性气体，坩锅表面通惰性气体保护，安装升液管、型腔和套筒；(4)上腔抽真空，液态金属在反重力下充型；(5)型腔充满后，保持结壳时间，然后增加下腔惰性气体的压力，复合材料在上腔真空，下腔增压的双重作用下补缩，凝固。本发明采用石英、硅铝系耐火材料制备的熔模模壳，避免了消失模吸铸的弊端，并采纳了下腔加压的凝固的方式。本发明使得铝基复合材料铸件机械性能大大提高，可以成形薄壁、复杂的铝基复合材料铸件，生产效率高，铸件精度高。
摘要（英）：

The antigravity vacuum sucking cast process for preparing aluminum base composite material in casting field includes the following steps: 1. heating to melt the composite material in crucible under the protection of inert gas and stirring; 2. shutting off inert gas, closing the middle partition board and vacuum pumping to refine; 3. finishing vacuum refining, introducing inert gas to crucible surface, and installing riser tube, mold cavity and sleeve; 4. vacuum pumping the mold cavity and antigravity filling liquid metal into the mold cavity; and 5. maintaining for crusting before increasing the pressure of inert gas to the lower cavity, feeding and solidifying composite material under the action of both vacuum in the upper cavity and the pressure of the lower cavity. The present invention raises the mechanical performance of aluminum base composite material casting, can form thin wall complicated aluminum base composite material casting, and has high production efficiency and high casting precision.

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