Sn对Al-Si-Mg系合金的时效动力学分析  

Effect of Sn on Ageing Kinetics of Al-Si-Mg Alloy

作　　者：亓效刚[1] 刘峰 王伟民 

机构地区：[1]山东大学材料学院,山东济南250061 [2]山东省医科院劳研所,山东济南250062

出　　处：《轻合金加工技术》2002年第4期38-40,共3页Light Alloy Fabrication Technology

摘　　要：Sn对Al-Si-Mg系合金的时效过程产生明显的影响,合金中加入Sn,若不进行时效处理,Sn作为夹杂降低合金的力学性能;若合金进行时效处理,Sn抑制Mg2Si沉淀相的聚集、长大,使其弥散分布,因而合金的力学性能有较大幅度的提高。运用Pashley时效动力学模型解释了Al-Si-Mg系合金的时效行为。用Lomer公式,通过计算,Al-Si-Mg系合金中加入微量元素Sn后,合金中的过剩空位浓度约为基体中过剩空位浓度的1/200,正是Sn与空位的较高结合能,抑制了Mg2Si沉淀相的粗大。Sn has obvious effect on aging process of Al-Si-Mg alloy.Sn can decrease the strength of the alloy as inclusions,if under no ageing process.However,Sn can depress the segregation and growth of Mg 2 Si,then increase the machenical properties of the alloy,under ageing process.Pashley ageing kinetics model is used to analyze the ageing process of Al-Si-Mg alloy.According to the Lomer equation,the left voids concentration of alloy is about as1/200as that of matrix,which induces high combining energy to depress the growth o f Mg 2 Si.

关 键 词：AL-SI-MG合金 时效动力学 锡 铝合金 

分 类 号：TG146.2[一般工业技术—材料科学与工程]