2A12铝合金厚板淬火残余应力的数值模拟  

Numerical simulation on quenching residual stress of 2A12 aluminum alloy thick sheet

作　　者：张志伟[1] 许东[1] 孙清汝 

机构地区：[1]北京控制工程研究所,北京100190 [2]南京科润工业介质有限公司,江苏南京211100

出　　处：《金属热处理》2013年第12期88-93,共6页Heat Treatment of Metals

摘　　要：运用Abaqus／standard有限元分析软件对2A12铝合金厚板淬火过程进行模拟，给出了淬火温度场及淬火残余应力分布，系统研究了厚度、淬火介质对减小淬火残余应力的影响。结果表明，厚度由20mm增加到30mm时，残余应力显著增加；厚度由30mm增加到60mim时，残余应力变化较小；厚度由60mm增加到70mm，残余应力有一定程度的减小。厚度为20mm和70mm时，水淬残余应力比PAG溶液淬火分别高出约55％和29％；厚度在30—60mm时，残余应力差异较小。淬火时将工件壁厚控制在20mm左右，并采用PAG溶液作为淬火介质，可有效减小残余应力。The quenching process of 2A12 aluminum alloy thick sheet was simulated by Abaques/standard finite element analysis software. The temperature field and the residual stress distribution were investigated. The effect of thicknesses and quenehants on reducing residual stress was systematically studied. The results show that the residual stress first increases significantly and then kept nearly constant as the plate thickness increased from 20 mm to 30 mm then to 60 mm. The residual stress decreases with the further increase of the sheet thickness from 60 mm to 70 mm. The residual stress of the sheet with thickness of 20 mm and 70 mm quenched in water is 55% and 29% higher than that quenched in PAG medium, respectively. The residual stress are small difference for the plate with thickness of 30-60 mm. The residual stress can be effectively controlled when the thickness of workpiece is about 20 mm and PAG solution is selected as quenchant during the quenching process.

关 键 词：2A12铝合金 淬火 残余应力 数值模拟 

分 类 号：TG156.36[金属学及工艺—热处理]