ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2013, Vol. 34 ›› Issue (2): 55-58.

• 组织和性能 • 上一篇    下一篇

P和B对高强度Ti-IF钢再结晶织构和力学性能的影响

彭堃,宋新莉,朱微微,朱上,贾涓,袁泽喜   

  1. 武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,武汉 430081
  • 收稿日期:2012-10-15 出版日期:2013-04-01 发布日期:2022-10-08
  • 通讯作者: 宋新莉
  • 作者简介:彭 堃(1984-),男,硕士生,高性能金属材料强韧化研究

Effect of P and B on Recrystallization Textures and Mechanical Properties of High Strength Ti-IF Steel

Peng Kun, Song Xinli, Zhu Weiwei, Zhu Shang, Jia Juan, Yuan Zexi   

  1. Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081
  • Received:2012-10-15 Published:2013-04-01 Online:2022-10-08
  • Contact: Song Xinli

摘要: 利用电子背散射技术(EBSD)等研究了4种P-B成分(/%:0.076~0.110P和0~0.005 2B)对Ti-IF钢(/%:0.001~0.003C、0.06~0.08Si、0.32~0.38Mn、0.002~0.008S、0.036~0.076Ti、0.002 0~0.004 0N)0.75mm冷轧板810℃ 120 s空冷退火后再结晶织构、强度、伸长率、加工硬化指数(n)和塑性应变比(r)的影响。结果表明,4种P-B成分冷轧Ti-IF钢退火后均发生了完全再结晶,获得多边形铁素体晶粒,主要织构组分是{111}<112>和{111}<110>。当P含量较高(0.110%)、B含量较低(0.000 6%)时钢的强度较高(抗拉强度387.5MPa,屈服强度260 MPa),但r值较低(1.5);P、B含量适量(0.089%P、0.005 2%B),强度和r值均较高(抗拉强度367.3 MPa,屈服强度201.5 MPa,r值1.95)。

关键词: 高强度Ti-IF钢, 磷, 硼, 再结晶织构, 力学性能

Abstract: The effect of 4 group P-B content (/% : 0.076-0.110P, 0-0.0052B) on recrystallization textures, strength, elongation, work hardening exponent (n) and plastic strain ratio (r) of Ti-IF steel (/% : 0.001-0.003C, 0.06 -0.08Si, 0.32-0.38Mn, 0.002-0.008S, 0.036-0.076Ti, 0.0020-0.0040N) 0.75 mm cold rolled sheet after annealing at 810 ℃ for 120 s air cooling has been studied by using electron backscatter diffraction (EBSD) technique etc. Results show that all annealed Ti-IF steels with 4 group P-B content have fully recrystallized to get polygonal ferrite with main texture components {111} <112> and {111} <110>. As higher P content (0.110% ) and lower B content (0.0006% ) the strength of steel is higher (tensile strength 387.5 MPa, Yield strength 260 MPa) but the r value is lower (1.5); as with suitable P and B content (0.089% P and 0.0052% B) , the strength and r value are all higher (tensile strength 367.3 MPa, yield strength 201.5 MPa and r value 1.95).

Key words: High Strength Ti-IF Steel, Phosphorus, Boron, Recrystallization Texture, Mechanical Properties