2014, Volume 16, Issue 1
Strategic Study of CAE >> 2014, Volume 16, Issue 1
Application research of Q&P concept in hot rolled AHSS production
The State Key Laboratory of Rolling and Automation，Northeastern University，Shenyang 110819，China
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Abstract
In order to satisfy the requirements of lightweight in the automotive industry，the development of advanced high strength steel obtained using the quenching and partitioning （Q&P）process has been paid extensive attentions. In the present work，the application of Q&P concept during hot rolling was investigated for wide use of Q&P process on the conventional hot rolling production line. It was shown that introducing thermo-mechanical treatment during the conventional Q&P process was favorable for significantly refining the microstructure and obtaining a certain amount of retained austenite，and the experimental steel possessed the higher product of strength and ductility under the condition of maintaining higher strength. The feasibility of producing the hot rolled Q&P steel（DQ（direct quenching）&P steel）was determined on the hot rolling production line by employing the new-generation thermo mechanical control process （TMCP）with ultra fast cooling at the core.
Keywords
advanced high strength steel ; Q&P ; DQ&P ; hot rolling ; retained austenite
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