1、 KS D 0204KSKSKSKSSKSKSKS KSKSKS SKSKS KSKS SKS KS - KS D 0204: 2007(IDT ISO 4967: 1998) 2007 11 26 http:/www.kats.go.krKS D 0204: 2007 : () ( ) () () () ( ) : (http:/www.standard.go.kr) : :1964 4 9 :2007 11 26 2007-1059 : : ( 02-509-7274) (http:/www.kats.go.kr ). 7 5 , . KS D 0204: 2007 (IDT ISO 49
2、67: 1998) Steel Determination of content of nonmetallic inclusionsMicrographic method using standard diagrams 1998 2 ISO 4967, Steel Determination of content of nonmetallic inclusions Micrographic method using standard diagrams . ISO 4967 ISO (TC 17) (SC 7) ( ) . 2 1 (ISO 4967: 1979) . A , B E . 1 (
3、reduction ratio) 3 . . . ( D ). ( ) . 2 . D . 0.50 mm2 100 . A, B, C, D DS . . A( ) / ( / ) . B( ) ( 3 ) / ( 3 .) . KS D 0204: 2007 2 C( ) / ( 3 ) . D( ) / ( 3 ) DS( ) 13 m . . D ( Dsulf) . Dcas , Dres , DDup . , , , . 100 . 6 . . A . i 0.5 3 1 ( A, B, C) ( D) ( DS). 2 . A 2 A 2 . 1 ( ) i A , m B ,
4、mC , mD , DS , m 0.5 37 17 18 1 13 1 127 77 76 4 19 1.5 261 184 176 9 27 2 436 342 320 16 38 2.5 649 555 510 25 53 3 898 ( 4 m 12 m 100 37 m i 0.5127 m i 1KS D 0204: 2007 11 100 261 m i 1.5436 m i 2KS D 0204: 2007 12 100 649 m i 2.5898 m i 3KS D 0204: 2007 13 B ( ) 2 m 9 m 9 m 15 m 100 17 m i 0.577
5、m i 1KS D 0204: 2007 14 100 184 m i 1.5342 m i 2KS D 0204: 2007 15 100 555 m i 2.5822 m i 3KS D 0204: 2007 16 C ( ) 2 m 5 m 5 m 12 m 100 18 m i 0.576 m i 1KS D 0204: 2007 17 100 176 m i 1.5320 m i 2KS D 0204: 2007 18 100 510 m i 2.5746 m i 3KS D 0204: 2007 19 D ( ) 3 m 8 m 8 m 13 m 100 1 i 0.54 i 1K
6、S D 0204: 2007 20 100 16 i 29 i 1.5KS D 0204: 2007 21 100 25 i 2.536 i 3KS D 0204: 2007 22 DS ( ) 13 m 76 m 100 13 m i 0.519 m i 1KS D 0204: 2007 23 100 27 m i 1.538 m i 2KS D 0204: 2007 24 100 53 m i 2.576 m i 3KS D 0204: 2007 25 B ( ) B.1 B.1 100 4 . . A , B , ( ) C , DS , . : A 2, B 2, C 1 DS 2.5
7、 DS 2.5KS D 0204: 2007 26 B.2 B , A 0.710 mm , B.2 a) . (D ) B.2 b) . D 49 D . 0.107 mm DS D . L L l4 . (l4) . L 0.71 l1 l2 l3 L l1 l2 l3 l4a) b) B.2 KS D 0204: 2007 27 C ( ) ( ) C.1 C.1 20 . 100 . C.1 A B C D DS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 0.5 0.5 1 1.5 0.5 1 0.5 2 0.5 0.5 0.
8、5 1s 1 0.5 2 1 0.5 1.5 0.5 1 0.5 1 0.5 0.5 0.5 1.5 1 0.5 1 1.5 3 0.5 0.5 1.5 1 0.5 0.5 0.5 1 0.5 0.5 1 0.5 0.5 1.5 1 0.5 0.5 1 0.5 0.5 1 0.5 0.5 1 1 1.5 C.2 . C.2 . KS D 0204: 2007 28 C.2 A B C D DS 0.5 1 1.5 2 2.5 3 6 2 1 1 0 0 2 1 0 1 0 0 5 3 1 0 0 0 2 2 2 0 0 1 6 2 1 0 0 0 4 2 1 0 0 0 2 1 0 0 0 0
9、 2 1 0 0 0 0 1 2 1 0 0 0 2 . C.3 i tot i moy C.2 . C.3.1 A a) itot (60.5) (21) (11.5) (12) 8.5 imoy itot/N 8.5/20 0.425 N (6.2 ). b) itot (20.5) (11) (12) 4 imoy 4/20 0.20 1 s . C.3.2 B a) itot (50.5) (31) (11.5) 7 imoy 7/20 0.35 b) itot (20.5) (21) (21.5) (13) 9 imoy 9/20 0.45 C.3.3 C a) itot (60.5) (21) (11.5) 6.5 imoy 6.5/20 0.325 b) itot (40.5) (21) (11.5) 5.5 imoy 5.5/20 0.275