TMCP process of HSLA steel produced by FTSR technology

doi:10.13251/j.issn.0254-6051.2021.05.026

Abstract

Abstract: TMCP process was carried on 700 MPa grade HSLA steel which was produced by FTSR technology and the effect of different rolling and cooling methods on mechanical properties and microstructure of the experimental steel strip was analyzed. The results show that there is significantly positive relationship between the strength of HSLA steel and accumulative deformation in finishing rolling stage. Laminar flow cooling method has little effect on mechanical properties of the experimental steel strip, but the nonuniformity of mechanical properties along width direction can be improved by interval cooling method. As ending cooling temperature increases from 600 ℃ to 670 ℃, the microstructure of the steel strip coarsens, but the precipitated phases precipitate more sufficiently, which leads to growing strength of the steel strip.

Key words: flexible thin slab rolling(FTSR), HSLA steel, thermo-mechanical control precess(TMCP), mechanical properties

CLC Number:

TG335.1

Zhang Xing, Song Zhigang, Hou Mingshan, Li Hongwei, Dong Jiliang, Gao Xiaoyao. TMCP process of HSLA steel produced by FTSR technology[J]. Heat Treatment of Metals, 2021, 46(5): 160-165.

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