灰铸铁中石墨形态

1、F()IM)RY EQUIPMENT AND TECHNOLOGYOct.2(X)9 M520095200910F()IM)RY EQUIPMENT AND TECHNOLOGYOct.2(X)9 M5F()IM)RY EQUIPMENT AND TECHNOLOGYOct.2(X)9 M5100022):ASTMA-247 GB7216-1987。ASTMA-2477.5, A E,GB7216-19876. A F 08 o: ; ; ;:TG143：B： 1674-6694 (2009)05-0053-02Graphite Form Classification and Characte

2、ristics of Gray Cast IronZ/ Shu(Colley of Materials Science and Enffinerin Beijing Patyteclinic University Buijing 100022, China)Abstract ：This paper introducrd the graphite form classiGcation of gray cast iron in ASTMA-247 and GB7216-1987. In The various forms in which graphite occurs in cast irons

3、 have been classified into seven lypes In ASTMA-247, the graphite form in cast iron has been classified into seven types, five types in gray cust iron, that is from A type to E type In GB7216-1987, the graphite form in gray cast iron has been classified into six types, that is from A type to F type,

4、 and the graphite flake length has been classified into eight types.Key words: gray cast iroix graphite form, graphite type, size of graphite flakeASTMA-247VIL3 VD5.71987IIII7,1SO945-756 oJI,IV,VGB7216-I IIVIVIIASTMA-247 I)、E5,ASTMA-247GB7216-19872。,VOGB7216-1987A、B、C、D、E、F6A、B、C、2A E)2 61)A,：2009-0

5、7-19:(1937-). 1994-2010 China Academic Journal Electronic Publishing House. All rights reserved, http:/www.qp埠屮qt0(t.20()9 No520()96)FF3ASTMA-247100 inm,856 mm* 12 min71.5 mm3 min3GB7216-19878 ,1100 ,3 min-6 min1.5 mm8xlOO5)E1 Waltroin C F Oper T J. Iron cast Hand eovb M . Iron cabling sociely,1981 ： 1462 ,M.:.2003:186.3 Angus H T.Physical and Engineering Properties of Cant u$on M . Elie Bntibh cost Iron research A)ciati()n. 1960: