Continuous cooling transformation of deformed austenite in highly hole-expandable steels

Cai, Ming-hui, Ding, Hao, Li, Xiao-bin and Tang, Zheng-you 2008, Continuous cooling transformation of deformed austenite in highly hole-expandable steels, Dongbei daxue xuebao/Journal of Northeastern University, vol. 29, no. 11, pp. 1576-1580.

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Title Continuous cooling transformation of deformed austenite in highly hole-expandable steels
Author(s) Cai, Ming-hui
Ding, Hao
Li, Xiao-bin
Tang, Zheng-you
Journal name Dongbei daxue xuebao/Journal of Northeastern University
Volume number 29
Issue number 11
Start page 1576
End page 1580
Total pages 5
Publisher Dongbei Daxue/Xuebao Bianjibu
Place of publication Shenyang, China
Publication date 2008
ISSN 1005-3026
Keyword(s) deformed austenite
Ferrite-bainite diphase steel
Mn mass ratio
Si mass ratio
transformation temperature
Summary The effects of Si and Mn contents on transformation temperature r3, transformed microstructure and mechanical properties of three kinds of low-carbon steels during continuous cooling were investigated. A r3 rises by 15-25°C when increasing Si content from 0.50% to 1.35%, and it drops by 30-50°C when increasing Mn content from 0.97% to 1.43%. The effect of Mn on A r3 is more significant than Si. Si stimulates the precipitation of the high-temperature equiaxed ferrite to suppress the bainite transformation, but Mn not only provides the grain refining of transformed microstructure but also stimulates the forming of bainite. The homogeneous and grain refining diphase ferrite/bainite steel (w(Si)=0.56, w(Mn)=1.43) can be obtained after deformed at 850°C and cooled at the rate 30°C/s, of which the tensile strength is up to 654 MPa.
Language eng
Field of Research 089999 Information and Computing Sciences not elsewhere classified
099999 Engineering not elsewhere classified
109999 Technology not elsewhere classified
Socio Economic Objective 970108 Expanding Knowledge in the Information and Computing Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2008, Dongbei Daxue/Xuebao Bianjibu
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