基于正交试验的过共晶Al-20Si合金变质工艺优化设计  

The Modification Process Optimization of Hypereutectic Al-20Si Alloys Based on Orthogonal Experiment

作　　者：赵岚[1] 杨明晓[1] 高尧[1] 张余[2] 童先[1,2,3] 

机构地区：[1]浙江工贸职业技术学院材料工程系,浙江温州325003 [2]浙江工贸职业技术学院汽车与机械工程学院,浙江温州325003 [3]温州莱特激光工程研究院有限公司,浙江温州325003

出　　处：《浙江工贸职业技术学院学报》2016年第2期42-45,共4页Journal of Zhejiang Industry & Trade Vocational College

摘　　要：基于L9(34)正交试验,本文对过共晶Al-20Si合金进行变质处理。通过直观和方差分析,确定最佳的变质工艺参数。结果表明:正交试验最佳的工艺参数为A2B2C1D2,变质工艺参数为0.04%的P添加量,0.6%的RE混合稀土添加量,20 min的变质时间以及780℃的变质温度,此时初生Si相转变为规则的六边形,平均尺寸为24.84μm,共晶硅相细化明显;因素A(P添加量)对变质效果有显著影响,B、C、D因素(分别为RE混合稀土添加量、变质时间和变质温度)对变质效果有一定的影响作用,各因素的影响程度分别为P添加量>RE混合稀土添加量>变质温度>变质时间。Based on L9（34） orthogonal experiment, modification treatments was made of hypereutectic Al-20Si alloys in this paper.Through direct analysis and variance analysis, the best process parameter of modification was determined. The results show that,the best process parameter of orthogonal experiment is A2B2C1D2, which is the quantity added of P is 0.04%, mixed rare earth is 0.6%,the modification time is 20min and the modification temperature is 780oC. The morphology of primary Si phase became regular hexagonsand the average size were 24.84μm, eutectic Si phase were refined significantly; Factor A（the quantity added of P） has an obviousinfluence on modification effect, while B、C、D（mixed rare element, modification time and modification temperature） have somecertain effects on modification effect. The extent of influence of these factors is the quantity added of P〉mixed rare element〉modificationtime〉modification temperature.

关 键 词：过共晶Al-20Si合金 正交试验 变质处理 组织形貌 

分 类 号：TG136.1[一般工业技术—材料科学与工程]