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450MPa级超细组织耐大气腐蚀钢板的开发与研制刘清友
39 4 Vol. 39, No . 4
2004 4 IRON AND STEEL April 2004
450 MPa *
1 1 2 2 2 3 3
刘清友 董 瀚 翁 宇 曲 鹏 许家彦 陈邦文 陈吉清
( 1. , 100081; 2. , 117000;
3. ( ) , 430080)
, 09C PTiRE Nb
, 3. 54. 8 Lm 450 MPa
,
T G335. 11A
NEW ULTRA-FINE GRAINED WEATHERING STEEL IN GRADE OF 450 MPa
1 1 2 2 2 3 3
LIU Qingyo , DONG Han , WENG Y , QU Peng , XU Jiayan , CHEN Bangw en , CHEN Jiqing
( 1. Instit t e for Str ct ral Mat erials of CISRI, Beijing 100081; 2.Technical Center , Benxi Iron and
Steel Gro p Company , Benxi 117000; 3. Technical Center , W han Iron and Steel Company , W han 430080)
ABSTRACTIn order to improving railw ay transportation efficiency, there is an attempt to se
higher strength w eathering steels for red cing vehicles w eight, increasing lords and safety g aran-
tee. A new ltra-fine grained microstr ct re control technology named DIFT controlled rolling
- 09 .
process w as sed to develop ltra fine grain C PTiRE For conventional w eathering steel
09 , 3. 54. 8
C PT iRE microalloyed w ith Nb m ch finer microstr ct re w ith ferrite grain size of
Lm co ld be obtained thro gh controlled rolling and cooling . As a res lt, the yield strength of the
steel is enhanced to 450 MPa. Its revealed that this steel has a good formability, w eldability and
, .
corrosion resistance property
KEY WORDS ltra-fine str ct re, high strength, corrosion resistance, w elding
1 345 MPa
345 MPa ,
09C PTiRE , ,
,
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