2014, Volume 16, Issue 1
Strategic Study of CAE >> 2014, Volume 16, Issue 1
The research on fast annealing microstructure evolution of low silicon TRIP steel with phosphorus
The State Key Laboratory of Rolling and Automation，Northeastern University，Shenyang 110819，China
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Abstract
The low silicon transformation induced plasticity（TRIP）steel with phosphorus addition at every stage of fast annealing process has been studied by heat treatment experiment at lab. The effects of annealing temperatures on microstructure constitute at every stage are mainly studied. The addition of low price element phosphorus can reduce silicon content， improve surface quality，solve galvanizing problem and reduce costs. Results show that the ferrite content decrease，and the mixture of bainite and martensite content increase at final microstructure. By X-ray diffraction（XRD）analysis，the retained austenite content increases from 12.7 % at 750 ℃ annealing to 14.9 % at 790 ℃.
Keywords
automobile steel ; TRIP steel ; low silicon ; fast annealing ; microstructure evolution
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