Abstract
Hypoeutectoid graphitic steels with BN as prime nucleating site for graphite nucleation were developed for improvement of drawability of wires. Al2O3 also acted as nucleation site for graphite. The steel chemistry has played an important role for BN formation and thus dictated the behaviour of graphite formation and tensile properties after graphitising annealing. The steels are with a low yield ratio of ∼0·5 while percentage elongation is in the range of 23–25% and percentage reduction in area is in the range of 45–51%.
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References
1.
Fukui
K.
and
Mizui
N.
‘High-strength sheet steels for the automotive industry’ , 171 ; 1994 , Baltimore , Iron and Steel Society/AIME 1994, 171 .
2.
Katayama
S.
and
Toda
M.
J. Mater Proc. Technol , 1996 , 62 , 358 .
3.
Iwamoto
T.
,
Hoshino
T.
,
Amano
K.
and
Nakano
Y.
Proc. Conf. on ‘Fundamentals and applications of microalloying forging steels’, Golden, CO, 1996, TMS/AIME, 227.
4.
Mega
T.
,
Morimoto
R.
,
Morita
M.
and
Shimomura
J.
Surf Interf Anal , 1996 , 24 , 375 .
5.
Leslie
W. C.
and
Rauch
G. C.
Metall. Trans. A , 1978 , 9A , 343 .
6.
Goldschmidt
H. J.
: ‘Interstitial alloys’ , 117 ; 1967 , London , Butterworths .
7.
Higgins
T.
and
Jeminson
G. V.
J. Iron Steel Inst ., 1965 , 203 , 146 .
8.
Harris
J. E.
,
Whiteman
J. A.
and
Quarrel
A. G.
Trans. TMS-AIME , 1965 , 233 , 168 .
9.
Fujihira
A.
: J. Jpn Inst. Met ., 1980 , 44 , 15 .
10.
Sueyoshi
H.
and
Suenaga
K.
J. Jpn Inst. Met ., 1978 , 42 , 676 .
11.
He
K.
,
Daniels
H. R.
,
Brown
A.
,
Brydson
R.
and
Edmonds
D. V.
Acta Mater ., 2007 , 55 , 2919 .
12.
Sueyoshi
H.
and
Suenaga
K.
J. Jpn Inst. Met ., 1979 , 43 , 333 .
13.
Okamoto
A.
: Metall Mater. Trans. A , 1989 , 20A , 1917 .
14.
Iwamoto
T.
: CAMP-ISIJ , 1995 , 8 , 1378 .
15.
Iwamoto
T.
,
Ota
H.
,
Hoshino
T.
,
Amano
K.
and
Shimomura
J.
Tetsu-to-Hagane , 1998 , 84 , 67 .
16.
Iwamoto
T.
,
Hoshino
T.
,
Matsuzaki
A.
and
Amano
K.
ISIJ Int ., 2002 , 42 , S77 .
17.
Iwamoto
T.
and
Murakami
T.
JFE Tech. Rep., 2004 , (4) , 74.
18.
He
K.
,
Edmonds
D. V.
,
Green
M. J. W.
and
Reynolds
P. E.
Mater. Sci. Technol ., 2004 , 1 , 207 .
19.
Tanaka
R.
and
Fujihara
A.
J. Jpn Inst. Metals . 1966 , 30 , (3 ), 279 .
20.
Woo
K. D.
,
Kim
S. W.
and
Kim
D. K.
Mater. Sci. Forum , 2005 , 475-479 , 4157 .
21.
Choi
J. O.
,
Kim
J. Y.
,
Choi
C. O.
,
Kim
J. K.
and
Rohatgi
P. K.
Mater. Sci. Eng. A, 2004, A383, (2), 323.