泡状铝合金渗流铸造工艺参数的试验分析

Experimental Analysis of Process Variable on Penetrating Casting of Foam Al-alloys Around Granules

采用正交实验方法,选择三种不同粒径的填料,系统研究了粒子预热温度、金属液浇注温度和充型压力对渗流铸造泡状铝合金成型工艺的影响,并对试验结果作了理论分析。认为,合理选择粒子预热温度是生产泡状金属铸件的前提,适当提高浇注温度是保证泡状组织均匀良好的关键,保持适度的充型压力有利于提高材质通孔率和工艺的稳定性。

Abstract The effects of preheating temperature of granules, pouring temperature of melt and forming pressure on the forming process of penetrating casting of foam Al-alloys around granules were systematically studied using orthogonal experiment method and choosing three kinds of the granules size and the experimental results were theoretically analysed. It is considered that the reasonable selection of granules preheating temperature is a prerequisite to produce the foam metal castings, proper increase of pouring temperature is a key to achieve the homogeneous foam construction and the moderate forming pressure can increase the product porosity and technological stability.