以连续铸造方法制备梯度材料的实验研究

提出了一种通过双流浇注连续铸造方法生产合金成分随铸件截面连续变化的新型梯度材料的设想。采用自行研制的双流浇注半连续铸造装置的Ａｌ－Ｓｉ二元合金进行了实验研究。实验结果表明：通过调整铸造工艺参数，如浇注温度、内外浇懈的流量比等，可以控制熔体的流动和凝固过程，获得铸件截面上不同的成分梯度分布，合金的力学性能，微观结构和合金成分之间有很好的对应关系。

INVESTIGATION OF PRODUCTION OF GRADIENT MATERIAL BY CONTINUOUS CASTING

A novel method of producing gradient material by continuous casting usingdouble--stream--pouring technique was proposed. The preparation of Al--Si gradient alloy wascarried cot by self--made double -- st ream -- pouring semi--continuous castingfacilities results show that in the steady state, the flow and the solidification of the outside stream andinside stream can be controlled by changing the parameters, such as casting temperature andvolume ratio of the two streams. Different gradient profile of composition in as--cast structurecan be obtained. The good corresponding relationships among the silicon concentration, theInicrostructure and the mechanical properity of the alloy are obtained.