J Mater Sci Technol ›› 2005, Vol. 21 ›› Issue (06): 813-816.

• Research Articles • Previous Articles     Next Articles

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

Yu CHEN, Guoyi TANG, Fangyu CHEN, Pinghe LI, Sunbing ZHOU   

  1. Graduation School at Shenzhen, Tsinghua University, Shenzhen 518055, China...
  • Received:2004-07-30 Revised:2004-11-18 Online:2005-11-28 Published:2009-10-10
  • Contact: Yu CHEN

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