金属热处理 ›› 2020, Vol. 45 ›› Issue (4): 51-54.DOI: 10.13251/j.issn.0254-6051.2020.04.010

• 材料研究 • 上一篇    下一篇

2.25Cr-1Mo与2.25Cr-1Mo-0.25V钢冷却转变对比分析

侯敬超1,2, 李杰1,2, 吴艳阳1,2, 袁锦程1,2, 尹卫江1,2, 牛红星1,2   

  1. 1. 舞阳钢铁有限责任公司, 河南 平顶山 462500;
    2. 石油及煤化工设备用临氢铬钼钢板开发及应用平顶山市重点试验室, 河南 平顶山 462500
  • 收稿日期:2019-10-12 出版日期:2020-04-25 发布日期:2020-05-08
  • 通讯作者: 吴艳阳,E-mail:wgwuyanyang@yeah.net
  • 作者简介:侯敬超(1989—),男,硕士,主要从事钢铁材料组织性能控制研究,E-mail:hou_jingchao@163.com
  • 基金资助:
    国家重点研发计划(2017YFB0305300)

Comparison and analysis of cooling transformation for 2.25Cr-1Mo and 2.25Cr-1Mo-0.25V steels

Hou Jingchao1,2, Li Jie1,2, Wu Yanyang1,2, Yuan Jincheng1,2, Yin Weijiang1,2, Niu Hongxing1,2   

  1. 1. Wuyang Iron and Steel Co., Ltd., Pingdingshan Henan 462500, China;
    2. Development and Application of Hydrogen Chromium Molybdenum Steel Sheet for Petroleum and Coal Chemical Equipment, Pingdingshan Key Laboratory, Pingdingshan Henan 462500, China
  • Received:2019-10-12 Online:2020-04-25 Published:2020-05-08

摘要: 采用相变仪、光学显微镜及扫描电镜研究了2.25Cr-1Mo和2.25Cr-1Mo-0.25V钢冷却转变过程,并分析了钒对其冷却转变的影响。结果表明,与2.25Cr-1Mo钢的CCT曲线相比,2.25Cr-1Mo-0.25V钢铁素体转变区及贝氏体转变区均向右移,并且在现有试验条件下已无法观察到珠光体转变区;钒添加到2.25Cr-1Mo钢中,能够提高钢的淬透性,2.25Cr-1Mo-0.25V钢在48 000 ℃/h冷速下能生成部分马氏体;钒能够细化钢板显微组织,与2.25Cr-1Mo钢相比,2.25Cr-1Mo-0.25V钢在800 ℃/h冷速下组织更为细小。

关键词: 2.25Cr-1Mo钢, 2.25Cr-1Mo-0.25V钢, 冷却转变, CCT曲线, 组织

Abstract: Cooling transformations of 2.25Cr-1Mo and 2.25Cr-1Mo-0.25V steels were researched by phase change instrument, OM and SEM, and the effect of V on the cooling transformation was analyzed. The results show that compared with the CCT curves of 2.25Cr-1Mo steel, both the ferrite and the bainite transformation zones of the CCT curves for 2.25Cr-1Mo-0.25V steel shift right. Pearlite transformation zone is unable to be observed under existing test conditions. Adding V into 2.25Cr-1Mo steel improves the hardenability. 2.25Cr-1Mo-0.25V steel can transform into martensite partially under 48 000 ℃/h cooling rate. V can refine microstructure of the steel, the microstructure of 2.25Cr-1Mo-0.25V steel is finer than that of 2.25Cr-1Mo steel under 800 ℃/h cooling rate.

Key words: 2.25Cr-1Mo steel, 2.25Cr-1Mo-0.25V steel, cooling transformation, CCT curves, microstructure

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