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 ›› 2016, Vol. 37 ›› Issue (5): 45-47.

• 组织和性能 • 上一篇    下一篇

控轧控冷工艺对SCM435钢盘条组织和性能的影响

阮士朋1,2,3，王利军2,3，陈继林2,3，郭明仪2,3，翟进坡2,3   

  1. 1. 北京科技大学冶金工程研究院，北京100083 ；
    2. 邢台钢铁有限责任公司技术中心，邢台054027；
    3. 河北省线材工程技术研究中心，邢台054027；
  • 收稿日期:2016-04-11 出版日期:2016-10-01 发布日期:2022-08-02
  • 作者简介:阮士朋(1983-)，男，博士生（北京科技大学)，副主任工程师，2006年河北工业大学(本科)毕业，高品质线材产品研 发。

Effect of Control-Rolling-Cooling Process on Structure and Properties of Steel SCM435 Rod Coil

Ruan Shipeng1,2,3 , Wang Lijun2,3 , Chen Jilin2,3 , Guo Mingyi2,3 , Zhai Jinpo2,3   

  1. 1. Metallurgy Engineering Research Institute, University of Science and Technology, Beijing 100083 ；
    2. Technology Center, Xingtai Iron and Steel Corp Ltd, Xingtai 054027 ；
    3. Hebei Province Engineering and Technology Research Center for Wire Rod, Xingtai 054027 ;
  • Received:2016-04-11 Published:2016-10-01 Online:2022-08-02

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摘要： 试验钢SCM435（/%:0.33~0.38C,0.15~0.35Si,0.60~0.85Mn,≤0.025P,≤0.025S,0.90~1.20Cr,0.15~0.30Mo）盘条的生产流程为80t BOF-LF-280 mm×325 mm铸坯-160 mm×160 mm热轧坯-热连轧成Φ16 mm盘条。试验研究了160 mm×160 mm热轧坯由常规轧制工艺（开轧1060℃,精轧930~950℃,吐丝860~900℃,冷却速度0.5~0.6℃/s）和控轧控冷工艺（开轧1060℃,精轧820~850℃,吐丝780~820℃,冷却速度0.4~0.5℃/s）对SCM435钢热轧盘条组织和力学性能的影响。结果表明,随着精轧温度的降低和冷却速度的减小,钢热轧盘条的组织得到改善,抗拉强度明显降低;常规工艺轧制SCM435钢热轧盘条的抗拉强度平均952 MPa,组织为铁素体+珠光体+贝氏体+马氏体,控轧控冷工艺轧制的SCM435钢热轧盘条的抗拉强度平均817 MPa,组织为均匀的铁素体+珠光体。结合控轧控冷工艺原理对钢的组织和性能变化进行了分析。

关键词: SCM435钢, Φ16 mm盘条, 控轧控冷, 组织, 力学性能

Abstract: The production flowsheet of test steel SCM435 rod coil (/% ：0.33-0.38C, 0.15-0.35Si, 0.60-0.85Mn, ≤0.025P, ≤0.025S, 0.90-1.20Cr, 0.15-0.30Mo) is 80t BOF-LF-280 mm x325 mm casting bloom-160 mm x 160 mm hot-rolled billet-hot continuous rolling to Φ16 mm rod coil. The effect of 160 mm x 160 mm hot-rolled billet rolling to rod coil processes by normal rolling ( beginning rolling at 1060 °C , finishing rolling at 930-950℃ , finishing exit temperature 860-900℃ , cooling rate 0.5-0.6℃/s) and control-rolling-cooling (beginning rolling at 1060℃ , finishing rolling at 820-850°C , finishing exit temperature 780-820℃, cooling rate 0.4-0.5°C/s) on structure and mechanical properties of steel SCM435 hot-rolled rod coil has been tested and studied. Results show that with decreasing the finishing temperature and cooling rate, the structure of steel hot-rolled rod coil is improved and the tensile strength of steel decreases obviously, that is the average tensile strength of steel SCM435 hot-rolled rod coil rolled by normal rolling process is 952 MPa with structure of ferrite + pearlite + bainite + martensite, while the average tensile strength of SCM435 hot-rolled rod coil rolled by control rolling-cooling process is 817 MPa with structure of ferrite + pearlite. Based on the principle of control-rolling-cooling the analysis on change of structure and properties of steel has been carried out.

Key words: Steel SCM435, Φ16 mm Rod Coil, Control-Rolling-Cooling, Structure, Mechanical Properties

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