金属热处理 ›› 2022, Vol. 47 ›› Issue (1): 276-280.DOI: 10.13251/j.issn.0254-6051.2022.01.046

• 工艺研究 • 上一篇    下一篇

亚温淬火对NiCrMo-3堆焊层耐磨性能的影响

武斌, 伍金荣, 柴慧, 李永坤   

  1. 西南石油大学 新能源与材料学院, 四川 成都 610500
  • 收稿日期:2021-10-10 修回日期:2021-11-08 出版日期:2022-01-25 发布日期:2022-02-18
  • 作者简介:武 斌(1985—),男,实验师,主要研究方向为材料连接技术与理论,E-mail:kohnkaka_2005@sina.com

Effect of subcritical quenching on wear resistance of NiCrMo-3 surfacing layer

Wu Bin, Wu Jinrong, Chai Hui, Li Yongkun   

  1. School of New Energy and Materials, Southwest Petroleum University, Chengdu Sichuan 610500, China
  • Received:2021-10-10 Revised:2021-11-08 Online:2022-01-25 Published:2022-02-18

摘要: 研究了亚温淬火对NiCrMo-3堆焊层显微组织、力学性能及耐磨性能的影响。结果表明,与未淬火试样相比,亚温淬火后NiCrMo-3堆焊层的晶粒较小,呈絮状分布。堆焊层表面的主要物相为金属间化合物CrO2和NiFe2O4,基体间存在Ni、Cr元素形成的间隙化合物。亚温淬火后堆焊层的硬度较高并具有良好的耐磨性能,且强度提高,但韧性下降。亚温水淬时的摩擦因数在摩擦过程中减小,拉伸断口中的脆硬相之间有韧性带状组织。

关键词: 亚温淬火, NiCrMo-3堆焊层, 显微组织, 耐磨性

Abstract: Effect of subcritical quenching on microstructure, mechanical properties and wear resistance of the NiCrMo-3 surfacing layer was studied. The results show that the grain size of the surfacing layer after subcritical quenching is smaller and flocculent structured which composes of intermetallic compounds as CrO2 and NiFe2O4 on surface and interstitial compounds formed by Ni and Cr elements at substrates. The hardness of the surfacing layer after subcritical quenching is high and shows good wear resistance, the strength increases but the toughness decreases. The friction coefficient of which subcritical water quenched decreases during friction test, and a ductile banded structure between the brittle and hard phases occurs in its tensile fracture.

Key words: subcritical quenching, NiCrMo-3 surfacing layer, microstructure, wear resistance

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