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WC质量分数对Ti(C0.7N0.3)基金属陶瓷组织和性能的影响

李朝,  李楠,  柳学全,  蔺菲,  李发长,  丁存光,  李金普

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李朝, 李楠, 柳学全, 蔺菲, 李发长, 丁存光, 李金普. WC质量分数对Ti(C0.7N0.3)基金属陶瓷组织和性能的影响[J]. 粉末冶金技术, 2018, 36(2): 100-105. doi: 10.19591/j.cnki.cn11-1974/tf.2018.02.004
引用本文: 李朝, 李楠, 柳学全, 蔺菲, 李发长, 丁存光, 李金普. WC质量分数对Ti(C0.7N0.3)基金属陶瓷组织和性能的影响[J]. 粉末冶金技术, 2018, 36(2): 100-105. doi: 10.19591/j.cnki.cn11-1974/tf.2018.02.004
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LI Chao, LI Nan, LIU Xue-quan, LIN Fei, LI Fa-zhang, DING Cun-guang, LI Jin-pu. Effect of WC mass fraction on the microstructure and properties of Ti(C0.7N0.3) -based cermets[J]. Powder Metallurgy Technology, 2018, 36(2): 100-105. doi: 10.19591/j.cnki.cn11-1974/tf.2018.02.004
Citation: LI Chao, LI Nan, LIU Xue-quan, LIN Fei, LI Fa-zhang, DING Cun-guang, LI Jin-pu. Effect of WC mass fraction on the microstructure and properties of Ti(C0.7N0.3) -based cermets[J]. Powder Metallurgy Technology, 2018, 36(2): 100-105. doi: 10.19591/j.cnki.cn11-1974/tf.2018.02.004
shu

WC质量分数对Ti(C0.7N0.3)基金属陶瓷组织和性能的影响

doi: 10.19591/j.cnki.cn11-1974/tf.2018.02.004

  • 钢铁研究总院,北京 100081

基金项目: 

安泰科技基金资助项目 2017ZL04PCY

详细信息
    通讯作者:

    李朝, E-mail: 623029205@qq.com

  • 中图分类号: TF125

Effect of WC mass fraction on the microstructure and properties of Ti(C0.7N0.3) -based cermets

  • Central Iron & Steel Research Institute, Beijing 100081, China

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    摘要
  • 摘要: 采用粉末冶金低压烧结方法制备Ti(C0.7N0.3)基金属陶瓷, 结合扫描电子显微镜(scanning electron microscope, SEM)观察、能谱(energy dispersive spectrum, EDS)分析、力学及磁学性能测试, 研究了WC质量分数从0增大到20%的过程中, Ti(C0.7N0.3)基金属陶瓷的显微组织、力学性能及磁学性能变化。结果表明, 经1420℃低压烧结1 h后, Ti(C0.7N0.3)基金属陶瓷显微组织有明显的芯/壳结构, 且随着WC质量分数增大, 黑色硬质相数量及体积减小, 环形相和黏结相体积增大。WC质量分数从0增大到20%的过程中, 硬度先增大后减小, 抗弯强度先增大后趋于稳定, 饱和磁化强度逐渐减小, 矫顽磁力逐渐增大。WC质量分数为15%时, 力学性能最佳, 其中HRA 91.6, 抗弯强度2160 MPa。
    Abstract: Ti(C0.7N0.3) -based cermets were prepared by low pressure sintering in powder metallurgy method. The effect of WC mass fraction on the microstructure, mechanical properties, and magnetic properties was investigated by scanning electron microscope (SEM) and energy dispersive spectrum (EDS), mechanical property test, and magnetic property test.Resultsshow that, after sintering at 1420 ℃for 1 h, there is obvious core/rim structure in the Ti(C0.7N0.3) -based cermets, and with the increase of WC content, the quantity and volume of black hard phase decrease and the volume of rim and binder phase increase. With the increase of WC mass fraction from 0 to 20%, the hardness increases firstly and then decreases, the bending strength increases firstly and then tends to be stable, the saturation magnetization decreases, and the coercivity increases gradually. When the WC mass fraction is 15%, the mechanical properties reach the optimum, the hardness is HRA 91.6 and the bending strength is 2160 MPa.
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  • 图  1  添加不同WC质量分数Ti(C0.7N0.3)基金属陶瓷的背散射电子像: (a) 0; (b) 5%; (c) 10%; (d) 15%; (e) 20%

    Figure  1.  Backscattered electron images of Ti(C0.7N0.3) -based cermets added by WC in different mass fraction: (a) 0; (b) 5%; (c) 10%; (d) 15%; (e) 20%

    下载: 全尺寸图片 幻灯片

    图  2  添加质量分数为15%WC制备的Ti(C0.7N0.3)基金属陶瓷不同相区的能谱分析: (a)扫描电子显微形貌; (b)位置a处能谱分析; (c)位置b处能谱分析; (d)位置c处能谱分析

    Figure  2.  EDS patterns of different regions in Ti(C0.7N0.3) -based cermets added by 15%WC by mass: (a) SEM image; (b) EDS in region a; (c) EDS in region b; (d) EDS in region c

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    图  3  WC质量分数对Ti(C0.7N0.3)基金属陶瓷硬度(a)和抗弯强度(b)的影响

    Figure  3.  Effect of WC mass fraction on the hardness (a) and bending strength (b) of Ti(C0.7N0.3) -based cermets

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    图  4  WC质量分数对Ti(C0.7N0.3)基金属陶瓷钴磁(a)和矫顽磁力(b)的影响

    Figure  4.  Effect of WC mass fraction on the cobalt magnetization (a) and coercivity (b) of Ti(C0.7N0.3) -based cermets

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    表  1  Ti(C0.7N0.3)基金属陶瓷组元成分(质量分数)

    Table  1.   Component of Ti(C0.7N0.3) -based cermets  %

    原料 Ti(C0.7N0.3) WC Mo2C TaC Co+Ni
    a 65 0 10 5 20
    b 60 5 10 5 20
    c 55 10 10 5 20
    d 50 15 10 5 20
    e 45 20 10 5 20
    下载: 导出CSV

    表  2  金属陶瓷主要原料的化学成分和粒度

    Table  2.   Chemical component and particle size of raw powders

    原料 化学成分（质量分数）/ % 粒度/ μm
    Ti Ta Mo W C N O Ni Co
    Ti(C0.7N0.3) 77.87 ― ― ― 13.56 6.73 0.61 ― ― 1.82
    WC ― ― ― 93.23 6.16 ― 0.16 ― ― 0.42
    Mo2C ― 93.65 ― 5.76 0.05 0.58 ― ― 1.62
    TaC ― 93.41 ― ― 6.23 0.05 0.12 ― ― 1.14
    Ni ― ― ― ― 0.011 ― 0.49 99.95 ― 1.96
    Co ― ― ― ― 0.015 ― 0.47 ― 99.97 0.86
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  • 收稿日期:  2017-09-26
  • 刊出日期:  2018-04-27

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