• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2018, Vol. 54 ›› Issue (10): 110-116.doi: 10.3901/JME.2018.10.110

• 材料科学与工程 • 上一篇    下一篇

关于轴类锻件拔长过程中组织均匀性控制的研究

陈飞, 刘建生, 马越   

  1. 太原科技大学材料科学与工程学院 太原 030024
  • 收稿日期:2017-06-13 修回日期:2017-12-28 出版日期:2018-05-20 发布日期:2018-05-20
  • 通讯作者: 刘建生(通信作者),男,1958年生,教授,博士研究生导师。主要研究方向为关键大型锻件制造理论与技术。E-mail:2052118200@qq.com
  • 作者简介:陈飞,男,1990年出生。主要研究方向为关键大型锻件制造理论与技术。E-mail:547704374@qq.com
  • 基金资助:
    国家自然科学基金资助项目(51275330)。

Research on Controlling Organization Uniformity of Axial Forgings in the Process of Swaging

CHEN Fei, LIU Jiansheng, MA Yue   

  1. College of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024
  • Received:2017-06-13 Revised:2017-12-28 Online:2018-05-20 Published:2018-05-20

摘要: 汽轮机低压转子的终锻成型通常使用上平下V砧进行拔长,锻件变形很不均匀且晶粒分布均匀性较差,为后续热处理增加了难度。通过拔长缩比试验结合DEFORM-3D数值模拟,以30Cr2Ni4MoV低压转子钢为研究对象,将控制轴类锻件组织不均匀性作为目标,对不同拔长工艺进行对比,探究变形量和变形温度对锻件微观组织均匀性的影响。数值模拟与物理模拟结果表明,变形量和温度对锻件内部晶粒度影响较大,通过增加变形量,提高锻造温度,能够较为有效地控制锻件组织均匀性;当锻造温度为1 250℃,锻比为1.2~1.3时,锻件组织均匀性最佳。研究结果可为汽轮机转子终锻成形工艺的制定提供参考。

关键词: 30Cr2Ni4MoV钢, 拔长, 轴, 组织均匀性

Abstract: The upper flat and lower V-shaped anvils swaging is usually used in final forging forming of a part of steam turbine that is named low pressure rotor, which results in uneven forgings deformation and distribution of grain and makes the following heat treatment more difficult. Taking microstructure uniformity controlling as the target, 30Cr2Ni4MoV low-pressure rotor steel is used. And with the method of combination of shrinkage ratio experiment and numerical simulation by DEFORM-3D, the effects of the deformation and temperature on microstructure uniformity of forgings are researched. The results of numerical simulation and physical simulation show that the degree of deformation and heating temperature have great influence on grain size of the forgings. By increasing the degree of deformation and forging temperature, microstructure uniformity of forgings can be controlled effectively. When the forging temperature is 1 250℃ and forging ratio is 1.2-1.3, the most even microstructure of the forgings is obtained. The results can provide reference for the establishment of final forging molding process of the steam turbine rotor.

Key words: 30Cr2Ni4MoV steel, axle, organization uniformity, swaging

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