·250· 北京科技大学学报 1999年第3期 (3)采用钢丝直径为l.4mm的钢丝轮进行3 Underwood E E,Banerji K.Invited Review Fractals in 打毛是最合理的. Fractogrphy.Mater Sci Engng,1986,80:1 4 Pande C S,Richards L E,Louat N,Dempsey B D, 参考文献 Schwoeble J.Fractal Characterization of Fractured Sur- 1 Mandelbrot BB,Passoja D E,Paullay A J.Fractal Charac- faces.Acta Metall.,1987,35:1633 ter of Fracture Surfaces of Metals.Nature,1984,308:721 5张鹏，崔建忠，杜云慧.钢-铝固液相复合中浸镀助焊 2穆在勤，龙期威.金属的断裂研究.金属学报，1988,24 剂的应用研究.金属学报，1997,33(7)：869 (2):A142 Fractal on Steel-Aluminum Solid to Liquid Bonding Zhang Peng",Du Yunhui",Ren Xueping",Kang Yonglin,Liu Hanwu,Cui Jianzhong? 1)Material Science and Engineering School,UST Beijing.Beijing 100083,China 2)Metal Forming Department,Northeastem University,Shenyang 110006,China ABSTRACT The relationship between fractal dimension of the 08Al steel plate blast sanded surface that of the steel-aluminium solid to liquid bonding plate shearing surface and interfacial shear strength was deter- mined by using fractal theory.It was recieved that the maximum interfacial shear strength 65.3 MPa correspon- ded to the optimum fractal dimension 2.33 of the shearing surface of bonding plate,and the fractal dimension of the blast sanded surface of steel plate which was blast sanded by the wheel made by steel wire(diameter was 1.4mm)was 2.36. KEY WORDS blast sanded surface;bonding plate shearing surface;fractal dimension;interfacial shear strength 米米米米米米米米米米米米米米米米米米米米米米米米米米米米米米米米米米米米米米米米来米米米 (上接247页) Role of Ceramic Foam Filter during the Smelting of Superalloy Guo Xiaozhuo,Dong Jianxin,Hu Yaohe,Xie Xishan Material Science and Engineering School,UST Beijing,Beijing 100083,China ABSTRACT The influence of different filters on efficiency of filtration and microstructures during the superalloys melting was investigated by means of X-ray diffractor,MAAS automatic image instrument and gas analyse.The experimental results show that both filters can strongly remove oxides,and that filter micro- structures effect on the high-temperature property,impact property and efficiency of filtration of the filters. KEY WORDS filtration;filter;ceramic foam filter;superalloy一 2 0 5 . 1 北 京 科 技 大 学 学 报 年 第 期 9 9 9 3 采 用钢丝 直径 为 3 ( ) 1 . 4 ~ 的钢 丝 轮 进行 3 打 毛 是最合理 的 . 4 参 考 文 献 1 n M a d e l o b r t B B , Pas s oj a D E , Pa u ll ay A J . F acr at l C h ar e - t e r o f r ar e utr e s u r fa c e s o r M eat 一s . N a t u r e , 一9 5 4 , 30 5 : 7 2 1 5 2 穆在 勤 , 龙期威 . 金 属的断裂 研究 . 金属 学报 , 19 88 , 24 ( 2 ) : A 14 2 U n d e wr o d E E , B an e叮1 K . I n v i et d eR v i e w F ar e at l s in F ar ct o g r Ph y . M at e r S e i E n gn g , 1 9 8 6 , 8 0 : l P an d e C S , 田e h ar ds L E , L o u a t N , D e m P s e y B D , S e hw oc b l e J . Far e at l C h a r a ct e ir Z a ti o n o f F ar c l u r e d S ur - 伪 c e s . A e at M e at l l . , 1 9 8 7 , 3 5 : 16 3 3 张 鹏 , 崔 建忠 , 杜云 慧 . 钢一铝 固液相 复合中浸镀助焊 剂 的应用研 究 . 金 属 学报 , 1 9 9 7 , 3 3 (7 ) : 8 6 9 F r a e t a l o n S t e e l 一 A l um i num S o li d t o L iqu id B o n d i n g hZ a 馆 eP 馆 , ), D u uY n h u i , , , R e n Xu 印i叮 , ), aK心 oY gln in , ), Li u 石乞 n w矿 ), uC i , h 。肚方。心 , l ) Maet ir a l S e i e n e e an d nE g in e e inr g S e h o l , U S T B e ij i n g, B e ij ign l 0 0() 8 3 , C h ian 2 ) M aet l F o rm i n g D eP a rt n l e n 仁N o hrt e as t e m U n i v ers ity, Sh e n y an g 1 10 00 6 , C h in a A B S T R A C T hT e re l at ion s h iP b e tw e e n fr a e at l d im e n s ion o f ht e 0 8A I ste e l Pl ate b las t asn de d s ur af e e ht at o f ht e s te e l 一 a l um in i um s o lid t o liqu id b on d i n g Plat e hs e a n n g sur af e e an d int e ir 触c lal hs e ar str e n 目ht w as d e t e -r m in e d 勿 u s l n g fr ac at l ht e o .ry l w a s re e i e v e d ht at ht e m ax 而um int e r acf i a l s he ar str e n ght 6 5 . 3 M P a e o r e sP0 n - de d t o ht e op t im um afr e at l d im e n s ion 2 . 3 3 o f ht e sh e a ir n g s ur af e e o f b on d in g Pl ate , a n d ht e fr a e at l d im e n s i o n o f ht e b l a s t s an d e d s ur fac e o f st e e l Pl at e w h i e h w a s b l a s t s an d e d b y t h e w h e e l m a d e 勿 st e e l w ir e ( id am e et r w a s 1 . 4 m m ) w a s 2 . 3 6 . K E Y W O R】〕5 b l a s t s an d e d s ur fa c e : b o n d i n g P lat e s h e iar n g s ur fa c e : far e at l d而 e n s i o n : int e far e i a l s h e ar s etr n吵 (上接 2 4 7 页) R o l e o f C e r am i e F o am F ilt e r dur i n g ht e S m e lt i n g o f S uP e r a ll o y G u o 」几a oz h u o , D o ng J i a nx i n , 万扮扮口 h e, iX e X派, h a n M at ier al S e ien e e an d E n ig n e r in g S e h o l , U S T B e ij i n g , B e ij in g l X() 0 8 3 , C h in a A B S T R A C T hT e i n fl u en e e o f d i fe r e nt if lt e r s o n e if e i e n c y o f if ltr a t l o n an d m i e r o s tl u c trU e s d ur 记g hte s uP e arl l o y s m e it in g w a s ivn e s t i g at e d b y m e an s o f X ~ r a y d i份a c ot r, M A A S a u to m at i e 加 a ge isn 七氏 lm e in an d ga s an a ly s e . hT e e x Pe ir m e n ta l er s u lt s s h o w ht a t b o ht if lt e r s e an s tr on g l y r e m o ve ox id e s , an d ht at if l et r m i e r o - s trU e trU e s e fe e t o n ht e h ihg 一 e m Pe r a t ur e Pr o ep yrt , im Pa e t Pr o Pe yrt an d e if e i e n e y o f if ltr a t ion o f ht e if lt e r s . K E Y W O R D S if ltr a t l o n : if lt e r ; e e r a 们n i c fo am if l et r ; s u pe ar ll o y