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 ›› 2023, Vol. 44 ›› Issue (6): 101-106.DOI: 10.20057/j.1003-8620.2023-00024

• 形变与相变 • 上一篇    下一篇

34CrNi3MoV钢奥氏体晶粒长大模型验证与应用

郑冰1,4, 徐东2,3, 王怡群2, 王学玺2, 赵红阳1, 巨东英1   

  1. 1 辽宁科技大学材料与冶金学院, 鞍山 114051;
    2 中原特钢装备制造有限公司技术中心,济源 459008;
    3 河北工程大学,河北省高品质冷镦钢技术创新中心, 邯郸 056038;
    4 河北普阳钢铁集团,河北省高塑韧性耐磨钢板技术创新中心,邯郸 056305
  • 出版日期:2023-12-01 发布日期:2023-11-21
  • 通讯作者: 徐东
  • 作者简介:郑冰(1981―),女,博士研究生;E-mail:zhengbing1881@163.com
  • 基金资助:
    国家自然科学基金联合基金项目 (NSFC)(U20A20272);河北省自然科学基金重点研发计划项目军民科技协同创新专项(22351001D);邯郸市科学研究计划重点项目(21122015004);河北省高等学校科学技术研究项目资助(CXY2023004)

Verification and Application of Austenite Grain Growth Model in 34CrNi3MoV Steel

Zheng Bing1,4, Xu Dong2,3, Wang Yiqun2, Wang Xuexi2, Zhao Hongyang1, Ju Dongying1   

  1. 1 School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, China;
    2 Technology center, Zhongyuan Special Steel Equipment Manufacturing Corp.Ltd., Jiyuan 459008, China;
    3 Technology Innovation Center for High Quality Cold Heading Steel of Hebei Province, Hebei University ofEngineering, Handan 056038, China;
    4 Technology Innovation Center for Wear Resistant Steel Plate ofHigh plasticity and High Toughness of Hebei Province, Hebei Puyang Iron and Steel Corp.Ltd.,Handan 056305, China
  • Published:2023-12-01 Online:2023-11-21

摘要:

通过热处理试验并采用金相法分析研究了加热温度和保温时间对34CrNi3MoV钢奥氏体晶粒长大行为的影响。结果表明,加热温度对34CrNi3MoV钢奥氏体晶粒尺寸的影响尤为显著,随加热温度(900~1 200 ℃)的升高,晶粒尺寸逐步增大。在初始晶粒尺寸情况下,900 ℃保温30 min(12.1 μm)和950 ℃保温10 min(15.1 μm)都与原始晶粒尺寸级别相差不大,1 050 ℃保温30 min(37.8 μm)时,晶粒尺寸达到原始晶粒尺寸的3.35倍, 得到34CrNi3MoV钢晶粒长大的激活能Q=176.6 kJ/mol。随保温时间的延长,加热温度对奥氏体晶粒尺寸的影响越来越弱。950 ℃保温时,晶粒长大的临界保温时间大约为90 min左右。1 050 ℃保温时,其临界保温时间大约为30 min。加热温度越高,达到临界保温时间后,晶粒长大就越缓慢。加热温度为850~950 ℃,保温时间60~180 min,可使34CrNi3MoV钢平均晶粒尺寸控制在22.5~44.9 μm(国标8.0~6.0级)而满足要求。

关键词: 34CrNi3MoV钢, 奥氏体晶粒度, 激活能, 晶粒尺寸

Abstract: The effects of heating temperature and holding time on austenitic grain growth behavior of 34CrNi3MoV steel were studied by heat treatment test and metallography.The results show that the effect of heating temperature on austenitic grain size of 34CrNi3MoV steel is particularly significant, and the grain size increases gradually with the increase of heating temperature (900-1 200 ℃). In the case of initial grain size, both 900 ℃ holding for 30 min(12.1 μm) and 950 ℃ holding for 10 min (15.1 μm) have little difference with the original grain size level, and 1 050 ℃ holding for 30 min(37.8 μm), The activation energy Q of grain growth of 34CrNi3MoV steel is 176.6 kJ/mol when the grain size is 3.35 times of the original grain size. With the extension of holding time, the influence of heating temperature on austenite grain size becomes weaker and weaker. At 950 ℃, the critical holding time for grain growth is about 90 min. At 1 050 ℃, the critical holding time is about 30 min. The higher the heating temperature, the slower the grain growth after reaching the critical holding time. The heating temperature is 850-950 ℃ and the holding time is 60-180 min, which can make the average grain size of 34CrNi3MoV steel controlled in 22.5-44.9 μm(national standard 8.0-6.0) and meet the requirements.

Key words: 34CrNi3MoV Steel, Austenite Grain Size, Activation Energy, Grain Size

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