| Cr3 C2含量对Cr3 C2/Ni3 Al复合材料摩擦磨损性能的影响 |
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| 作者姓名： | 傅丽华 韩伟 谢琰军 李长海 董超芳 赵琳 田志凌 |
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| 作者单位： | 钢铁研究总院，北京100081;北京科技大学材料科学与工程学院，北京100083;钢铁研究总院,北京,100081;查尔姆斯理工大学材料与制造技术学院，哥德堡SE-412 96，瑞典;北京科技大学材料科学与工程学院,北京,100083 |
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| 基金项目： | 清华大学摩擦学国家重点实验室开放基金资助项目(SKLTKF14B11)国家国际科技合作专项资助项目(2015DFA50970，2012DFG51670) |
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| 摘 要： | 采用热等静压法制备Ni3Al合金和Cr3C2含量不同的Ni3Al基复合耐磨材料,利用扫描电镜、能谱仪、X射线衍射仪及摩擦磨损试验机,系统地研究Cr3C2含量对材料组织特征、硬度及摩擦磨损性能的影响.结果表明:Cr3C2/Ni3Al复合材料中,Cr3C2颗粒与Ni3Al颗粒之间发生互扩散作用,使部分Cr3C2颗粒转变为M7C3（M=Cr,Fe,Ni）结构;在特定的摩擦磨损条件下,随着Ni3Al基体中Cr3C2比例增大,Cr3C2/Ni3Al复合材料的耐磨性能显著提高,达到了Ni3Al合金耐磨性能的4~10倍.此外,随着Ni3Al基体中Cr3C2比例的增大,Cr3C2/Ni3Al复合材料对对磨盘的切削、刮擦作用减弱,对磨盘的磨损量减少.
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| 关 键 词： | 金属间化合物 热等静压 颗粒增强复合材料 微观组织 摩擦磨损 |
| 收稿时间： | 2016-05-26 |
Influence of Cr3C2 content on the wear properties of Cr3C2/Ni3Al composites |
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| Affiliation: | 1. Central Iron and Steel Research Institute, Beijing 100081, China;2. School of Material Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;3. Department of Materials and Manufacturing Technology, Chalmers University of Technology, Goteborg SE-412 96, Sweden |
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| Abstract: | A The Ni3Al-alloy and its composites with different Cr3C2 contents were fabricated by a hot isostatic pressing (HIP) technique. The influences of Cr3C2 content on the microstructure, hardness and wear properties of the Cr3C2/Ni3 Al composites were investigated by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and wear tribometry. The results show that inter-diffusion occurs between the original Cr3C2 and the Ni3AI particles during the HIP process and the Cr3C2 particles partially transform into M7C3 (M=Cr, Fe, Ni) structures. Under specific friction and wear conditions, the wear resistance of the Cr3C2/Ni3Al composites is significantly improved due to the addition of Cr3C2 particles by about 4-10 times, compared to the Ni3Al alloy. In addition, the cutting and scraping effects of counter-part disks by the Cr3C2/Ni3Al composites decreases with increasing Cr3C2 addition, resulting in a reduction in wear rate of counter-part disks. |
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