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激光熔覆金刚石−金属耐磨涂层的组织和性能

庞爱红 孙贵乾 董俊言 庞诚宇 郭宇 董书山

庞爱红, 孙贵乾, 董俊言, 庞诚宇, 郭宇, 董书山. 激光熔覆金刚石−金属耐磨涂层的组织和性能[J]. 金刚石与磨料磨具工程, 2023, 43(4): 514-522. doi: 10.13394/j.cnki.jgszz.2023.0127
引用本文: 庞爱红, 孙贵乾, 董俊言, 庞诚宇, 郭宇, 董书山. 激光熔覆金刚石−金属耐磨涂层的组织和性能[J]. 金刚石与磨料磨具工程, 2023, 43(4): 514-522. doi: 10.13394/j.cnki.jgszz.2023.0127
PANG Aihong, SUN Guiqian, DONG Junyan, PANG Chengyu, GUO Yu, DONG Shushan. Microstructure and properties of laser cladding diamond-metal wear-resistant coating[J]. Diamond & Abrasives Engineering, 2023, 43(4): 514-522. doi: 10.13394/j.cnki.jgszz.2023.0127
Citation: PANG Aihong, SUN Guiqian, DONG Junyan, PANG Chengyu, GUO Yu, DONG Shushan. Microstructure and properties of laser cladding diamond-metal wear-resistant coating[J]. Diamond & Abrasives Engineering, 2023, 43(4): 514-522. doi: 10.13394/j.cnki.jgszz.2023.0127

激光熔覆金刚石−金属耐磨涂层的组织和性能

doi: 10.13394/j.cnki.jgszz.2023.0127
基金项目: 河南省科学技术厅重大科技专项 “揭榜挂帅”项目(211110230500)。
详细信息
    作者简介:

    庞爱红,女,1973 年生,助理工程师。主要研究方向:金刚石及其微粉的生产、加工、研发等。E-mail:holddiamond@163.com

    通讯作者:

    董书山,男,1966年生,教授。主要研究方向:金属预合金粉末、超硬功能材料及制品等。E-mail:dongss@jlu.edu.cn

  • 中图分类号: TQ164; TG58; TG74

Microstructure and properties of laser cladding diamond-metal wear-resistant coating

  • 摘要:

    在10~30 μm的细颗粒金刚石表面进行镀Cr处理,并将其与Ni-Cr-B-Si粉末混合置于碳钢表面,采用激光热源将预置粉末熔覆于碳钢表面制备耐磨涂层。结果表明:金刚石表面的增厚镀Cr层在激光高温热场中可有效保护金刚石,避免金刚石在高温下发生氧化及石墨化,且可使金刚石与金属基体间实现冶金结合。对涂层的金相、物相及形貌进行分析,发现金刚石可显著提升涂层的冷却速率,同时细化冷凝组织,提高其硬度并增强其耐磨性。添加质量分数为20%镀Cr金刚石的熔覆涂层的耐磨性较未添加镀Cr金刚石时的提升了4.6倍,摩擦系数降低近50%。

     

  • 图  1  预铺粉料示意图

    Figure  1.  Schematic diagram of pre-laid powder

    图  2  镀Cr金刚石的SEM形貌和XRD图谱

    Figure  2.  SEM morphology and XRD pattern of Cr-coated diamond

    SEM morphology of the Cr-coated diamond XRD pattern of the Cr-coated diamond

    图  3  试样A、B、C激光熔覆层的XRD图谱

    Figure  3.  XRD patterns of the laser cladding layers of samples A, B and C

    图  4  试样熔覆层的横截面尺寸及金相形貌

    Figure  4.  Cross-section size and metallographic morphology of sample cladding layers

    图  5  试样A、B、C激光熔覆层不同部位的金相组织照片

    Figure  5.  Metallographic photos of different parts of laser cladding layers on samples A, B, and C

    图  6  B、C试样熔覆层断口的SEM形貌

    Figure  6.  SEM Morphologies of fracture surfaces of sample B and C cladding layers

    图  7  B、C试样熔覆层内部金刚石与基体结合的SEM形貌

    Figure  7.  SEM morphologies of diamond and matrix bonding inside the cladding layers of sample B and C

    图  8  A、B、C试样沿平行或垂直于涂层熔合线方向的SEM及元素线扫描结果

    Figure  8.  SEM and element line scanning results along the directions parallel or perpendicular to the fusion line of cladding layer of sample A, B and C

    图  9  A、B、C试样熔覆层不同位置的硬度值

    Figure  9.  Hardness values of cladding layers at different positions of sample A, B and C

    图  10  试样A、B、C的摩擦磨损质量及摩擦系数测试结果

    Figure  10.  Test results of wear quality and friction coefficients of samples A, B and C

    表  1  金刚石微粉外部杂质的ICP检测结果

    Table  1.   ICP detection results of external impurities in diamond powder

    元素质量分数 ω1 / %
    Si0.003 2
    Fe0.001 9
    Ni0.000 3
    Mn0.000 3
    Ca0.002 7
    Mg0.003 1
    合计0.011 5
    下载: 导出CSV

    表  2  中碳钢基板的化学成分

    Table  2.   Chemical compositions of medium carbon steel substrate

    元素质量分数 ω2 / %
    C0.440
    Si0.160
    Mn0.500
    P0.015
    S0.035
    Fe余量
    下载: 导出CSV

    表  3  Ni-Cr-B-Si合金粉末的化学成分

    Table  3.   Chemical compositions of Ni-Cr-B-Si alloy powder

    元素质量分数 ω3 / %
    C 0.5~1.1
    Si 3.5~5.5
    B 3.0~4.5
    Cr15.0~20.0
    Fe ≤5.0
    Ni 余量
    下载: 导出CSV
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出版历程
  • 收稿日期:  2023-06-11
  • 修回日期:  2023-07-05
  • 录用日期:  2023-07-11
  • 刊出日期:  2023-08-30

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