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 ›› 2007, Vol. 28 ›› Issue (6): 21-23.

• 试验研究 • 上一篇    下一篇

优质弹簧钢60Si2CrVAT控轧控冷工艺的热模拟研究

黄学启,刘雅政,崔娟   

  1. 北京科技大学材料科学与工程学院,北京100083
  • 收稿日期:2007-05-31 出版日期:2007-12-01 发布日期:2022-12-27
  • 作者简介:黄学启(1978-),男,硕士研究生,高强度优质弹簧钢的研究与开发。
  • 基金资助:
    北京市科技计划基金资助项目(D0404001040221)

Thermal Simulation Study on Controlled Rolling and Cooling Process for Quality Spring 60Si2CrVAT

Huang Xueqi,Liu Yazheng ,Cui  Juan   

  1. School of Materals Science and Engineering,University of Science and Technology,Beijing 100083
  • Received:2007-05-31 Published:2007-12-01 Online:2022-12-27

摘要: 用Gleeble-1500热模拟实验机测定了优质弹簧钢60Si2CrVAT的CCT曲线,并用光学显微镜和透射电镜研究了不同的终轧温度、冷却速度下的组织和相变。结果表明,冷速为1℃/s时,弹簧钢60Si2CrVAT中的珠光体含量约为98%;随着冷速的增加,铁素体和珠光体的含量逐渐减小,贝氏体和马氏体含量逐渐增加;当冷速达到9℃/s时,基体全部为马氏体;终轧温度850℃、冷速为1℃/s时,弹簧钢60Si2CrVAT的索氏体含量达到90%,强塑性最好,即Rm 1301 MPa,Rp0.2 928 MPa,A 23.8%,Z 38.6%。

关键词: 弹簧钢60Si2CrVAT, 组织演变, CCT 曲线, 控轧控冷

Abstract: The  continuous  cooling  transformation(CCT)curves,structure  and  phase  transformation  of  quality  spring steel 60Si2CrVAT with different finishing rolling temperature and cooling rate have been examined and studied by Gleeble-1500 thermal mechanical simulator,optical microscope and transmission electron microsope. Results showed that as cooling rate was1  ℃/s,the pearlite content in  spring  steel  60Si2CrVAT was about 98%;with increasing cooling rate the ferite and pearlite content gradually decreased while bainite and martensite content increased; and as cooling rate was up to 9 ℃/g,the matrix  was  all  martensite.With  finishing  temperature  850  ℃  and  cooling  rate  1  ℃/s,the  sorbite  content  in  spring  steel 60Si2CrVAT  was  up  to90%  with  excellent  strength  and  toughness  i.e.  Rm1301  MPa,Rp0.2928  Mpa,A23.8%  and  Z38.6%.

Key words: Spring , Steel , 60Si2CrVAT,Structure , Evolution,CCT , Curves,Controlled , Rolling , and , Cooling