影响Ti-Ni合金弹簧疲劳寿命的因素  

Influence Factors of Fatigue Limit in Ti-Ni Alloy Spiral Spring

作　　者：贺志荣[1] 

机构地区：[1]陕西工学院机电工程系,陕西汉中723003

出　　处：《金属热处理》2000年第9期10-12,共3页Heat Treatment of Metals

基　　金：陕西省教委重点科研基金! ( 95JZK1 4 ) ;国家出国留学基金

摘　　要：利用示差扫描热分析仪 (DSC)和热循环疲劳试验 ,研究了形状记忆处理温度、冷加工率和喷丸工艺对Ti 50 2Ni形状记忆合金 (SMA)弹簧疲劳寿命的影响。结果表明 ,在 673～ 773K热处理状态下 ,该合金的相变类型为 ,经 773K热处理后 ,弹簧有较高的疲劳寿命 ;用冷加工率较小的Ti Ni丝绕制的弹簧疲劳寿命较高 ;喷丸处理可有效提高该弹簧的疲劳寿命。ST5”BZ]The effect of the temperature of shape memory treatment,cold working rate and shot-peening process on the fatigue limit of Ti-50.2Ni shape memory alloy (SMA) spiral spring had been studied by differential scanning calorimetry(DSC) and thermal cycling fatigue test.After shape memory treatment at 673～773K,the transformation type of this alloy was .The Ti-Ni SMA spiral spring had longer fatigue limit when heat treatment at 773K.The fatigue limit of the spring made with small cold working rate Ti-Niwire was higher.The fatigue limit of Ti-Ni SMA spring could be efficiently increased by shot-peening.

关 键 词：TI-NI合金 形状记忆合金 螺旋弹簧 疲劳寿命 

分 类 号：TH135.1[机械工程—机械制造及自动化] TG139.6[一般工业技术—材料科学与工程]