铜合金熔体泡沫陶瓷离心过滤技术研究

Study on Ceramic Foam Centrifugal Filtration Copper Alloy Melt

提出通过用离心加压使铜合金通过高密度、大厚度泡沫陶瓷从而强化过滤效果的新方法,研究了过滤工艺参数对铜合金过滤效果的影响。试验结果表明,泡沫陶瓷孔径与厚度、熔体温度、旋转速度等对铜合金的洁净度及力学性能有重要影响。采用该方法过滤铜合金熔体,抗拉强度比未过滤的提高10.8%,延伸率提高27.2%。金相观察表明,这种强化过滤对合金中15μm以上夹杂物有显著滤除效果。

A new technique was put forward to strengthening filtration effects through centrifugal force pressed copper alloy melt flow through ceramic foam with high density and large thickness. The influence of filtering process parameters on filtering effects of copper alloy was investigated. Results show that ceramic foam pore size and thickness, melt temperature, rotational speed had important effects on the cleanliness of copper alloy and mechanical properties. The tensile strength and elongation of the copper alloy whose melt is filtered by the method proposed are improved by 10.8% and by 27.2% , respectively, compared with those of the alloy without filtration treatment. The structure of the alloy filtered was investigated by OM （optical microscope）. The results indicate that inclusion with more than 15 μm in size can be effectively removed from the alloy by strengthening filtration.