ISSN：1003-8620

CN：42-1243/TF

Governed by: CITIC Pacific Special Steel Group Co., LTD

Sponsored by: Daye Special Steel Co., LTD.

Special Steel ›› 2007, Vol. 28 ›› Issue (3): 10-12.

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Effect of Hot Rolled Cooling Process on Structure and Properties of Nb-Ti Microalloy Dual Phase Steel

Chen  Liansheng1,2,Na   Shunsang2,Di  Guobiao1,Zhang  Hongbo2,Wang  Yuexiang2, Liu Zhenyu2,Liu Xianghua2， He  Shuxing3   

  1. 1 State Key Laboratory of Rolling& Automation,Northeast University,Shenyang 110004;
    2 Hebei Polytechnic University,Tangshan 063009;
    3 Guofeng Iron and Steel Co Ltd,Tangshan 063000
  • Received:2006-11-07 Online:2007-05-01 Published:2023-01-31

热轧冷却工艺对Nb-Ti微合金双相钢组织和性能的影响

陈连生1,2，那顺桑2，狄国标1，张洪波2，王月香1，刘振宇1，刘相华1，何舒星3   

  1. 1轧制技术及连轧自动化国家重点实验室(东北大学),沈阳110004;
    2河北理工大学冶金与能源学院，唐山063009;
    3唐山国丰钢铁有限公司，唐山063000
  • 作者简介:陈连生(1968-),男，教授，1998年燕山大学毕业，轧制新工 艺及钢材组织性能控制。
  • 基金资助:
    河北省自然科学基金资助项目(编号E2006000353)

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Abstract: The  effect  of hot rolled plate  air  cooling(800~850℃ to750℃)+ water  cooling(750  ℃ to  300～180 ℃)two  stage  cooling  mode  and  water  cooling(782℃  to760℃)+  air  cooling(760℃  to713  ℃)+  water  cooling (713  ℃ to  414  ℃)three  stage  cooling  mode  on  structure  and  mechanical  properties  of dual  steel  0.08C,1.02Mn,  0.22Si,0.02Nb,0.01Ti has been studied. Results showed that 5.5 μm ferite + dispersed lath martensite structure could be got by two stage cooling mode,and yield strength of steel was 345～365 MPa,tensile strength 565～575 MPa,yield strength-tensile strength ratio 0.60~0.65 which were better than that by three stage cooling mode.

Key words: Nb-Ti Microalloying,Hot Rolling Dual Phase Steel,Control Cooling,Structure,Mechanical Property

摘要： 研究了热轧后空冷(800-850℃→750℃)+水冷(750℃→300～180℃)的两段式和水冷(782℃→760℃)+空冷(760℃→713℃)+水冷(713℃→414℃)三段式冷却方式对双相钢(％:0.08C、1.02Mn、0.22Si、0.02Nb、0.01Ti)组织和机械性能的影响。结果表明,采用两段式冷却方式可得到铁素体+分散的板条马氏体组织,并使铁素体尺寸达5.5μm,钢的屈服强度为345～365 MPa,抗拉强度为565～575 MPa、屈强比为0.60～0.65,优于三段式冷却方式轧制的双相钢。

关键词: Nb-Ti微合金化, 热轧双相钢, 控制冷却, 组织, 力学性能

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