金属热处理 ›› 2022, Vol. 47 ›› Issue (7): 98-101.DOI: 10.13251/j.issn.0254-6051.2022.07.017

• 工艺研究 • 上一篇    下一篇

真空时效加热到温时间滞后现象对FV520B钢组织及性能的影响

于晃1, 王飞宇1, 包翠敏1, 王全振1, 陈炜1, 曲德毅1, 蒋申柱1, 马煜林2   

  1. 1.沈阳鼓风机集团股份有限公司, 辽宁 沈阳 110869;
    2.沈阳大学 机械工程学院, 辽宁 沈阳 110044
  • 收稿日期:2022-01-21 修回日期:2022-04-29 出版日期:2022-07-25 发布日期:2022-08-12
  • 作者简介:于 晃(1988—),男,工程师,硕士,主要研究方向为各类鼓、压风机及泵类产品零部件热处理及数值模拟分析,E-mail:403354359@qq.com
  • 基金资助:
    辽宁省自然基金博士启动项目(2019-BS-168)

Effect of heating arrival time lag on microstructure and properties of FV520B steel during vacuum aging

Yu Huang1, Wang Feiyu1, Bao Cuimin1, Wang Quanzhen1, Chen Wei1, Qu Deyi1, Jiang Shenzhu1, Ma Yulin2   

  1. 1. Shenyang Blower Works Group Corporation, Shenyang Liaoning 110869, China;
    2. College of Mechanical Engineering, Shenyang University, Shenyang Liaoning 110044, China
  • Received:2022-01-21 Revised:2022-04-29 Online:2022-07-25 Published:2022-08-12

摘要: 通过对FV520钢真空热处理温度实时跟踪,分析了不同加热温度下到温时间滞后的情况,并研究了在600 ℃时效温度下不同保温时间对显微组织及力学性能的影响。结果表明:真空炉加热到温时间滞后的现象随着加热温度的降低,滞后时间随之延长;FV520B钢在真空时效保温初期时,由于心部温度尚未达到加热设定的温度,随着保温时间的延长,显微组织发生较大转变,残留奥氏体含量增加,沉淀相逐渐析出;屈服强度随保温时间的延长而降低,冲击吸收能量随着保温时间的延长而增加;可以通过真空炉电能消耗判断工件是否均温,可用于指导热处理工艺参数的制定。

关键词: FV520钢, 真空时效, 加热到温时间, 显微组织, 力学性能

Abstract: By real-time tracing of vacuum heat treatment temperature of FV520B steel, the heating time lag at different heating temperatures was analyzed and the effect of different holding time on the microstructure and mechanical properties aging at 600 ℃ for different time was studied. The results show that the time lag of vacuum heat treatment increases with the decrease of heating temperature. In the early stage of vacuum aging of the FV520B steel, due to the time lag, the temperature in the workpiece core does not reach the set heating temperature. With the extension of the holding time, the microstructure changes greatly, the content of retained austenite increases and the precipitated phase gradually precipitates. The yield strength decreases and the impact absorbed energy increases with the prolongation of holding time. The power consumption of vacuum furnace can be used to determine whether the workpiece temperature is uniform, which can be used to guide the design of heat treatment process parameters.

Key words: FV520 steel, vacuum aging, heating arrival time, microstructure, mechanical proprieties

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