金属热处理 ›› 2021, Vol. 46 ›› Issue (12): 24-30.DOI: 10.13251/j.issn.0254-6051.2021.12.005

• 专栏 • 上一篇    下一篇

Nb对H13钢组织及冲击性能的影响

欧阳伟豪1,2, 周健2, 高鹏1, 林鹏3, 迟宏宵2, 王文军4   

  1. 1.昆明理工大学 材料科学与工程学院, 云南 昆明 650093;
    2.钢铁研究总院 特殊钢研究所, 北京 100081;
    3.河北机电职业技术学院, 河北 邢台 054000;
    4.中信金属股份有限公司, 北京 100004
  • 收稿日期:2021-09-21 出版日期:2021-12-25 发布日期:2022-02-18
  • 通讯作者: 高 鹏,副教授,博士,E-mail:112783183@qq.com
  • 作者简介:欧阳伟豪(1996—),男,硕士研究生,主要研究方向为热作模具钢,E-mail:1206363741@qq.com。
  • 基金资助:
    中信铌钢发展奖励基金

Effect of Nb on microstructure and impact properties of H13 steel

Ouyang Weihao1,2, Zhou Jian2, Gao Peng1, Lin Peng3, Chi Hongxiao2, Wang Wenjun4   

  1. 1. Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming Yunnan 650093, China;
    2. Research Institute of Special Steels, Central Iron and Steel Research Institute, Beijing 100081, China;
    3. Hebei Institute of Mechanical and Electrical Technology, Xingtai Hebei 054000, China;
    4. CITIC Metal Co., Ltd., Beijing 100004, China
  • Received:2021-09-21 Online:2021-12-25 Published:2022-02-18

摘要: 采用OM、SEM、EDS、相分析、硬度测试和冲击性能试验等分析手段,对比研究Nb含量为0、0.067%和0.270%(质量分数)的H13试验钢淬回火后的组织及力学性能。结果表明,加入Nb后试验钢淬火硬度有所下降;淬火温度提高后,含Nb试验钢的晶粒尺寸小于0Nb试验钢,但含Nb试验钢中存在部分未溶碳化物;3种试验钢回火后的二次硬化峰均出现在510 ℃。经1050 ℃淬火、不同温度回火后,0.067Nb试验钢的冲击吸收能量高于0Nb试验钢。0.27Nb试验钢受到大尺寸碳化物的影响,淬火温度在1080 ℃以下时,冲击吸收能量不及另两种试验钢。

关键词: Nb, H13钢, 晶粒度, 冲击吸收能量, 碳化物

Abstract: Microstructure and mechanical properties of the H13 tested steel with Nb content of 0, 0.067% and 0.270% (mass fraction) after quenching and tempering were comparatively studied by means of OM, SEM, EDS, phase analysis, hardness test and impact properties test. The results show that quenching hardness of the tested steel decreases after adding Nb. As the quenching temperature increases, the grain size of the Nb-containing tested steels is smaller than that of the 0Nb tested steel, but there are some undissolved carbides in the Nb-containing tested steels. The secondary hardening peak of the three tested steels after tempering all appear at 510 ℃. After quenching at 1050 ℃ and tempering at different temperatures, the impact absorbed energy of the 0.067Nb tested steel is higher than that of the 0Nb tested steel. Due to the influence of large-size carbides, when the quenching temperature is below 1080 ℃, the impact absorbed energy of the 0.27Nb tested steel is not as good as that of the other two tested steels.

Key words: Nb, H13 steel, grain size, impact absorbed energy, carbide

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