Research and Empoldering of High Strength Weathering Steel S450EW

Article Preview

Abstract:

According to the characteristics of high strength weathering steel, this paper designs to develop anexperimental steel S450EW with yield strength higher than 450MPa.Through the study,it has been found that with decreasing cooling rate, the organizational changed largely, while ferrite and pearlite gradually transformed to martensite and a small amount of ferrite, then finally tomartensite organization.It has also been found that the crystal size decreased, and the experimentalsteel also precipitated a rectangular second phase particles of (NbTi) CN phase and TiC, which were sparsely distributed with the size of 100 ~ 300nm and below 30nm, while some phases were distributedasa number of strips in the grain boundary which mainly are C, Fe, Cr.

You might also be interested in these eBooks

Info:

Periodical:

Pages:

125-129

Citation:

Online since:

May 2014

Export:

Price:

* - Corresponding Author

[1] Chunling Zhang, CaiDayong, Zhang Keqin, et al, Microstructure and mechanical property of hot-rolled dual- phase weathering steel Cu-P-Cr-Ni-Mo, J. Transactions of Materials and Heat Treatment. 33(2012)33-37.

Google Scholar

[2] Qingjun Chen, Yonglin Kang, HairongGu, et al, Effect of Nb-Ti on Structure and Properties of High StrengthWeathering Steel, J. Special Steel. 26(2005) 30-33.

Google Scholar

[3] Qiuyue Jiang, Kunning Jia. Structure transformation of HAZ for high strength weathering steel , J. Heat Treatment of Metals. 38(2013) 28-30.

Google Scholar

[4] Chunling Zhang, Dayong Cai, Bo Liao. Study on the dual-phase treatment of steel 09CuPCrNi, J. Steel and Iron. 39(2004) 50-53.

Google Scholar

[5] Qingyou Liu, Dong Han, Weng Yu, et al. New Ultra-fine Grained Weathering Steel in Grade of 450 MPa, J. IRON AND STEEL. 39(2004) 45-48.

Google Scholar

[6] Dillmann P, Balasubramaniam R, Beranger G. Characterization of protective rust on ancient Indian iron using microprobe analyses, J. CorrosSci. 44(2002) 2231-2234.

DOI: 10.1016/s0010-938x(02)00028-8

Google Scholar

[7] Guoping Zhou, Zhenyu Liu, Yiqing Qiu, et al. The Improvement of Weathering Resistance by Increasing P Contentsin Cast Strips of Low Carbon Steels, J. Materials & Design. 30(2009) 43-42.

DOI: 10.1016/j.matdes.2009.04.010

Google Scholar

[8] Hui Feng, Feng Liu, Benxian Wang, et al. Effects of Cu and Cr content on mechanical properties and corrosion resistance of weathering steels, J. Transactions of Materials and Heat Treatment. 33(2012) 110-116.

Google Scholar

[9] Masao T, Tamaki S, Genichi S, et al. Characterization of Nanostructure of Rusts Formed on Weathering Steel, J. ISIJ International. 42(2012) 1534-1540.

DOI: 10.2355/isijinternational.42.1534

Google Scholar