Effects of Finish-Rolling Reduction on Microstructure and Mechanical Properties for C-Si-Mn Hot Rolled Dual-Phase Steel

Abstract:

The experiments were carried out on the φ450 hot rolling mill at the State Key laboratory of Rolling and Automatic of Northeastern University. The effect of different finish-rolling reduction on the microstructure and mechanical properties of C-Si-Mn hot rolled dual-phase steel were studied. It is found that the grain size of the ferrite would be finer with the increasing of finish-rolling reduction. Through the controlling of the finish-rolling reduction, grain size of the ferrite can be finer, so the better properties can be obtained by fine grain and sub-grain strengthened. With the low volume of lath martensite, the elongation of sample is high, the yield-strength ratio is low, and complex properties are better.

• Periodical: Advanced Materials Research (Volume 339)
• Pages: 215-218
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.339.215
• Online since: September 2011
• Authors: Bin Bin Sun, Zhi Wei Jia, Hong Mei Zhang
• Keywords: Finish-Rolling Reduction, Hot Rolled Dual-Phase Steel, Mechanical Property, Microstructure

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