高能球磨与热压烧结制备TiAl基合金.pdf

31 1 机 械 工 程 材 料 Vol. 31 No. 1 2007 1 M at rials for M chanical Engin ring Jan. 2007 TiAl , , , , , ( 武汉理工大学材料复合新技术国家重点实验室, 湖北武汉430070) : 研究了高能球磨与热 烧结制备TiAl 基合金的工艺结果表明: 在同一热 烧结工艺 下, 球磨时间越长, 烧结试样的密度越大以球磨40 h 的粉末为原料, 经1 300 热 烧结可获得 3 密度高达3. 971 g/ cm 的近全致密的TiAl 基合金, 且得到的T iA l 基合金晶粒较小, 组织均匀 : 高能球磨; 热 烧结; TiAl 基合金 : T B331; T Q 174 : A : 2007) Preparation of TiAlbased Alloys by Highenergy Ballmilling and Hotpressing Sintering WANG Tianguo, SHAOGangqin, D ANXinglong, SHI Xiaoliang, S N Peng, LI Yong ( Wuhan U niv rsity of T chnology, Wuhan 430070, China) Abstract: T iAlbas d alloy s w r pr par d by high n rgy ballmilling and hotpr ssing sint ring . With th milling t im incr asing, th d nsiti s of th alloy s b cam high r in th sam proc ss of hotpr ssing sint ring. Th d nsity of th T iAl alloy w ith n arfull d nsity obtain d by hotpr ssing sint ring at 1 300 from th powd r mill d 3 for 40 h is 3. 971 g/ cm . Homog n ous microstructur of T iAlbas d alloy s with fin grains is obtain d. Key words: high n rgy ballmilling ; hotpr ssing sint ring ; T iAlbas d alloy [ 3] TiAl 0 T iA l , TiAl , , , , , TiAl ( ) , [ 4, 5] , ; , , , [ 6] T iA l , , , [ 1] , T iAl T iA l , , , [ 2]