Research on Retained Austenite for Advanced Aluminum-containing Hot-rolled TRIP Steel

Abstract

Abstract: A new type of hot-rolled transformation induced plasticity (TRIP) steel with 2.3%Al was developed to replace conventional Si-bearing TRIP steel to improve surface quality of the steel sheet. The relationship between retained austenite volume fraction and hot-rolling processing was researched by Gleeble-2000 thermo-dynamic test for the Al-bearing steel. The experimental result showed that aluminum played an important role on retaining austenite and the volume fraction increased from 4.4% to 7.5% as coiling temperature increased from 350℃ to 450℃, while coiling temperature had a stronger effect on retaining austenite than finishing rolling temperature.

Key words: Aluminum, Retained austenite (RA), Coiling temperature (CT), Hot-rolling

Yu CHEN, Guoyi TANG, Fangyu CHEN, Pinghe LI, Sunbing ZHOU. Research on Retained Austenite for Advanced Aluminum-containing Hot-rolled TRIP Steel[J]. J Mater Sci Technol, 2005, 21(06): 813-816.

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Research on Retained Austenite for Advanced Aluminum-containing Hot-rolled TRIP Steel

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