薄板孔边挤压强化对高周疲劳寿命影响的试验  

High cycle fatigue life experiment of sheet metal with coldworking hole

作　　者：杨兴宇[1] 孟祥明[1] 董立伟[1] 段家宽[1] 耿中行[1] 赵福星[1] 

机构地区：[1]北京航空工程技术研究中心,北京100076

出　　处：《航空动力学报》2011年第2期362-369,共8页Journal of Aerospace Power

摘　　要：为提高某压气机封严篦齿盘均压孔的疲劳强度,根据均压孔的具体结构形式,设计了三种冷挤压强化方法:单侧多次挤压法、柱形头挤压法和T形头挤压法.用两种材料(不锈钢1Cr11Ni2W2MoV和镍基高温合金ЗП742)设计加工了带孔薄板模拟件,用上述三种强化方法对孔边进行了强化,同时进行了室温和高温两种温度下的高周疲劳对比试验.试验结果表明,对于薄板倒圆孔,T形头挤压工艺强化效果较好,可以有效提高薄板有孔模拟件的疲劳强度.In order to enhance the fatigue strength of the pressure equalizing ho le on labyrinth seal disc for a compressor,three kinds of coldworking techniques with different processes have been designed,i.e.：one-sided multiple extrusion process,cylindrical extrusion process and T shape extrusion process.High cycle f atigue tests of sheet metal specimen made of two kinds of materials with hole we re conducted under room temperature and high temperature in three different proc esses.Test results indicate that sheet metal with coldworking hole produced in T shape extrusion process can efficiently enhance the fatigue strength.

关 键 词：带孔薄板模拟件 疲劳强度 挤压强化 高周疲劳 对比试验 

分 类 号：V231.95[航空宇航科学与技术—航空宇航推进理论与工程]