工程科学学报，第41卷，第1期：117-123,2019年1月 Chinese Journal of Engineering,Vol.41,No.I:117-123,January 2019 DOI:10.13374/j.issn2095-9389.2019.01.013;http://journals.ustb.edu.cn CrC2/Ni3Al复合材料耐磨性提高的机制分析 傅丽华12)，韩伟2)，赵琳2)四，周孟)，李长海4)，田志凌2) 1)河南科技大学材料摩擦学重点实验室，洛阳4710032)钢铁研究总院，北京100081 3)北京科技大学材料科学与工程学院，北京1000834)查尔姆斯理工大学材料与制造技术学院，哥德堡SE41296 ☒通信作者，E-mail:hhnds(@aliyun.com 摘要为了探讨Cr,C2强化相提高Cr,C,NiAI复合材料耐磨性的机制，本文采用热等静压技术制备了Ni,Al合金和 CrC2/Ni,Al复合材料，借助纳米压痕仪对Ni,Al合金和Cr,C,/NiA复合材料中各组成相的力学性能进行了表征，利用销-盘 式摩擦磨损试验机研究了热等静压NiA1合金和Cr,C,/Ni,A!复合材料的耐磨性能，并结合扫描电子显微镜和纳米压痕仪分 析了材料磨损表面形貌和磨损次表面层硬度变化.结果表明，Cr,C2的添加提高了复合材料基体的硬度，C,C,/Ni,A1复合材 料中各组成相的纳米硬度和弹性模量由基体相、扩散相到硬芯相是逐渐增大的，呈现出梯度变化，有利于提高C,C2/N,A1复 合材料的耐磨性.在本研究实验条件下，Ni,Al合金和C,C2Ni,A1复合材料表面的磨损形式主要为磨粒磨损，CCz/Ni,Al复 合材料表现出更加优异的耐磨性能.C:,C,/N,A!复合材料耐磨性能的提高主要跟碳化物强化相阻断磨粒切削、减弱摩擦副 间相互作用、碱小加工硬化层厚度、磨粒尺寸等因素有关 关键词复合材料；CmC2强化相；Ni,A基：耐磨性能；机制分析 分类号TB333 Wear mechanism of Cr C2/Ni,Al composites showing excellent wear resistance FUli-hua2》,HAN Wei2,ZHA0Lin),ZHOU Meng》,山Chang-ha,TIAN Zhi-ling》 1)Key Laboratory of Material Tribology,Henan University of Science and Technology,Luoyang 471003,China 2)Central Iron and Steel Research Institute,Beijing 100081,China 3)School of Material Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China 4)Department of Materials and Manufacturing Technology,Chalmers University of Technology,Goteborg SE412 96,Sweden Corresponding author,E-mail:hhnds@aliyun.com ABSTRACT The Ni,Al intermetallic compound is considered an excellent wear-resistant material.The addition of Cr,Caparticles can further improve the wear resistance of Ni,Al-based alloys.In order to elucidate the wear mechanism of CrC/Ni Al composites im- proved by the CrC strengthening phase,Ni,Al-alloy and Cr Ca/Ni,Al composites were prepared by the hot isostatic pressing process in this study.The mechanical properties and wear resistance of each phase in the Ni,Al-alloy and CrC/Ni,Al composites were investi- gated using a nano-indentation instrument and a pin-on-disk friction and wear tester,respectively.The worn surface morphologies and the hardness of the subsurface layer under the worn surfaces of the Ni,Al-alloy and Cr,C2/Ni,Al composites were determined by a scan- ning electron microscopy (SEM)and a nano-indentation instrument.The results indicate that the hardness of the matrix phase in the CrC/Ni,Al composites is significantly improved by the addition of CrC particles.The nano-hardness and the elastic modulus of each phase in the CraC/Ni Al composites gradually increase from matrix phase through diffusion phase to hard core phase.The mechanical properties between the matrix,diffusion,and hard core phases in the CrC/Ni,Al composites present a gradient transition.This kind of structure distribution is good for enhancing the wear resistance of Cr C2/Ni,Al composite materials.As for friction and wear condi- tions in this study,abrasive wear was the dominant wear mechanism,which occurred on the surfaces of the Ni,Al-alloy and Cr,C,/ 收稿日期：2017-12-10 基金项目：国家国际科技合作专项资助项目(2015DFA50970)工程科学学报,第 41 卷,第 1 期:117鄄鄄123,2019 年 1 月 Chinese Journal of Engineering, Vol. 41, No. 1: 117鄄鄄123, January 2019 DOI: 10. 13374 / j. issn2095鄄鄄9389. 2019. 01. 013; http: / / journals. ustb. edu. cn Cr 3 C2 / Ni 3 Al 复合材料耐磨性提高的机制分析 傅丽华1,2) , 韩 伟2) , 赵 琳2) 苣 , 周 孟3) , 李长海4) , 田志凌2) 1) 河南科技大学材料摩擦学重点实验室, 洛阳 471003 2) 钢铁研究总院, 北京 100081 3) 北京科技大学材料科学与工程学院, 北京 100083 4) 查尔姆斯理工大学材料与制造技术学院, 哥德堡 SE鄄412 96 苣 通信作者, E鄄mail: hhnds@ aliyun. com 摘 要 为了探讨 Cr3C2 强化相提高 Cr3C2 / Ni 3Al 复合材料耐磨性的机制,本文采用热等静压技术制备了 Ni 3Al 合金和 Cr3C2 / Ni 3Al 复合材料,借助纳米压痕仪对 Ni 3Al 合金和 Cr3C2 / Ni 3Al 复合材料中各组成相的力学性能进行了表征,利用销鄄鄄盘 式摩擦磨损试验机研究了热等静压 Ni 3Al 合金和 Cr3C2 / Ni 3Al 复合材料的耐磨性能,并结合扫描电子显微镜和纳米压痕仪分 析了材料磨损表面形貌和磨损次表面层硬度变化. 结果表明,Cr3C2 的添加提高了复合材料基体的硬度,Cr3C2 / Ni 3Al 复合材 料中各组成相的纳米硬度和弹性模量由基体相、扩散相到硬芯相是逐渐增大的,呈现出梯度变化,有利于提高 Cr3C2 / Ni 3Al 复 合材料的耐磨性. 在本研究实验条件下,Ni 3Al 合金和 Cr3C2 / Ni 3Al 复合材料表面的磨损形式主要为磨粒磨损,Cr3C2 / Ni 3Al 复 合材料表现出更加优异的耐磨性能. Cr3C2 / Ni 3Al 复合材料耐磨性能的提高主要跟碳化物强化相阻断磨粒切削、减弱摩擦副 间相互作用、减小加工硬化层厚度、磨粒尺寸等因素有关. 关键词 复合材料; Cr3C2 强化相; Ni 3Al 基;耐磨性能; 机制分析 分类号 TB333 收稿日期: 2017鄄鄄12鄄鄄10 基金项目: 国家国际科技合作专项资助项目(2015DFA50970) Wear mechanism of Cr3C2 / Ni 3Al composites showing excellent wear resistance FU Li鄄hua 1, 2) , HAN Wei 2) , ZHAO Lin 2) 苣 , ZHOU Meng 3) , LI Chang鄄hai 4) , TIAN Zhi鄄ling 2) 1) Key Laboratory of Material Tribology, Henan University of Science and Technology, Luoyang 471003, China 2) Central Iron and Steel Research Institute, Beijing 100081, China 3) School of Material Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China 4) Department of Materials and Manufacturing Technology, Chalmers University of Technology,Goteborg SE鄄412 96, Sweden 苣 Corresponding author, E鄄mail: hhnds@ aliyun. com ABSTRACT The Ni 3Al intermetallic compound is considered an excellent wear鄄resistant material. The addition of Cr3C2 particles can further improve the wear resistance of Ni 3Al鄄based alloys. In order to elucidate the wear mechanism of Cr3C2 / Ni 3Al composites im鄄 proved by the Cr3C2 strengthening phase, Ni 3Al鄄alloy and Cr3C2 / Ni 3Al composites were prepared by the hot isostatic pressing process in this study. The mechanical properties and wear resistance of each phase in the Ni 3Al鄄alloy and Cr3C2 / Ni 3Al composites were investi鄄 gated using a nano鄄indentation instrument and a pin鄄on鄄disk friction and wear tester, respectively. The worn surface morphologies and the hardness of the subsurface layer under the worn surfaces of the Ni 3Al鄄alloy and Cr3C2 / Ni 3Al composites were determined by a scan鄄 ning electron microscopy (SEM) and a nano鄄indentation instrument. The results indicate that the hardness of the matrix phase in the Cr3C2 / Ni 3Al composites is significantly improved by the addition of Cr3C2 particles. The nano鄄hardness and the elastic modulus of each phase in the Cr3C2 / Ni 3Al composites gradually increase from matrix phase through diffusion phase to hard core phase. The mechanical properties between the matrix, diffusion, and hard core phases in the Cr3C2 / Ni 3Al composites present a gradient transition. This kind of structure distribution is good for enhancing the wear resistance of Cr3C2 / Ni 3Al composite materials. As for friction and wear condi鄄 tions in this study, abrasive wear was the dominant wear mechanism, which occurred on the surfaces of the Ni 3Al鄄alloy and Cr3C2 /