J. Mater. Sci. Technol. ›› 2006, Vol. 22 ›› Issue (06): 759-762.

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Microstructures and Mechanical Properties of Nb-Ti Bearing Hot-rolled TRIP Steels

陈宇1   

  1. 武钢技术中心
  • 收稿日期:2005-09-30 修回日期:2005-12-20 出版日期:2006-11-28 发布日期:2009-10-10
  • 通讯作者: 陈宇1

Microstructures and Mechanical Properties of Nb-Ti Bearing Hot-rolled TRIP Steels

Yu CHEN, Guoyi TANG, Haoyang TIAN, Feipeng LI, Yu ZHANG, Lihui WANG, Zhaojun DENG, Dexing LUO   

  1. Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China...
  • Received:2005-09-30 Revised:2005-12-20 Online:2006-11-28 Published:2009-10-10
  • Contact: Yu CHEN

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Abstract: Nb-Ti hot-rolled TRIP-assisted steel with high plasticity and appropriate volume percentage of retained austenite based on fine ferrite grain have been developed in the experiment. The test results showed that niobium tend to exist in solution state in matrix with less precipitation, and niobium-titanium could be precipitated in form of (Nb, Ti)C or (Nb, Ti) (C, N), which play an important role in increasing yield strength (from 495 MPa to 610 MPa). Besides, the retained austenite had a positive effect on improving the plasticity by transformation into martensite during tensile deformation.

Key words: Nb-Ti, Hot-rolling, TRIP-assisted steel