Mechanical Property and Precipitation of 900 MPa Grade Hot-rolled TRIP Steel

被引：0
|
作者：
Gao X. [1 ,3 ]
Zhao A. [2 ]
Zhang Y. [3 ]
机构：
[1] College of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing
[2] Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing
[3] Subway Operation Technology Center, Beijing Mass Transit Railway Operation Corporation Ltd, Beijing
来源：
Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research | 2018年 / 32卷 / 09期
关键词：
Hot rolling; Metallic materials; Precipitation; Structure property; TRIP steel;
D O I：
10.11901/1005.3093.2017.326
中图分类号：
学科分类号：
摘要：
The precipitation behavior and mechanical property of hot-rolled TRIP steel C-Si-Mn-Nb- V-N coiled at two different temperatures were investigated by means of XRD, TEM and tensile test. Results show that the size of precipitates is smaller, while the quantity of the precipitates is larger for the steel coiled at 450℃ rather than at 400℃. The average grain size of ferrite grains of the steel coiled at the two temperatures is all less than 5 μm, but the difference in quantities of retained austenite grains is small. The tensile strength and strength- ductility product of the steel coiled at 450℃ are 900 MPa and 27000 MPa•% respectively, which may be ascribed to both of the fine grain strengthening and precipitation strengthening. Therefore, the steel coiled at 450℃ presents better comprehensive mechanical property than that coiled at 400℃. © All right reserved.
引用
收藏
页码：662 / 668
页数：6
相关论文
共 19 条
  • [1] Wang X.D., Wang L., Rong Y.H., Current research condition and development of TRIP steel, Heat Treatment, 23, 6, (2008)
  • [2] Powers F.W., Automotive materials in the 21st century, Advanced Materials & Processes, 5, (2000)
  • [3] Xiong Z.L., Cai Q.W., Jiang H.T., Et al., Research on mechanical stability of austenite in TRIP steels, Materials Engineering, 3, (2011)
  • [4] Yi H.L., Xu W., Long L.Z., Et al., Research on microstructures and mechanical properties of hot rolled Ti-microalloyed TRIP steel, Materials Engineering, 12, (2014)
  • [5] Ding W., Gong Z.H., Tang D., Et al., Stability of retained austenite of low Si containing Al TRIP steel during deformation, Materials Engineering, 12, (2013)
  • [6] Girault E., Jacques P., Harlet P., Metallographic methods for revealing themultiphase microstructure of TRIP-assisted steels, Materials Characterization, 40, 2, (1998)
  • [7] Ray A., Dhua S.K., Microstructural manifestations in color: some applications forsteels, Materials Characterization, 37, 1, (1996)
  • [8] Mahieu J., Maki J., De Cooman B.C., Claessens S., Phase transformation and mechanical properties of Si-free CMnAl transformation-induced plasticity-aided steel, Metallurgical and Materials Transactions A, 33A, 8, (2002)
  • [9] Mintz B., Hot dip galvanizing of transformation induced plasticity and other intercritically annealed steels, Int Materials Review, 46, 4, (2001)
  • [10] Hanzaki A.Z., Hodgson P.D., Yue S., Hot deformation characteristics of Si-Mn TRIP steels with and without Nb microalloy additions, ISIJ Int, 35, 3, (1995)
12