High Silicon Addition in 780 MPa Cold-Rolled Dual Phase Steel for Carbon Reduction and Plastic Reinforce

Abstract:

Two types of DP steels which contain high carbon and high silicon respectively were produced on industrial production line. The microstructures and mechanical properties were investigated. Based on the thermodynamics and kinetic analyses, the intercritical austenization was researched. The results show that the high silicon and low carbon composition used to DP steel can avoid martensite band structure and decrease the martensite fraction, which will improve the elongation and work hardening ability. Phase transformation kinetic analysis indicates that high silicon content can make manganese enrich in austenite and stabilize austenite in intercritical region. Assisted by the strengthening role of silicon in austenite, the mechanical properties of high silicon and low carbon DP can fully meet the standard.

• Periodical: Advanced Materials Research (Volumes 1004-1005)
• Pages: 183-187
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1004-1005.183
• Online since: August 2014
• Authors: Shuang Kuang*, Xiu Mei Qi
• Keywords: Dual Phase Steel, High Silicon, Low Carbon, Plastic Reinforce

References

[1] World Auto Steel Committee: Advanced high strength steel (AHSS) application guidelines version 4. 1. World steel association, (2009).

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