磨削加工对Al2O3陶瓷表面质量与力学性能的影响

doi:10.11896/cldb.19080144

材料导报

2020, Vol. 34

Issue (16): 16020-16024 https://doi.org/10.11896/cldb.19080144

无机非金属及其复合材料

磨削加工对Al₂O₃陶瓷表面质量与力学性能的影响

梁静静¹, 张相召¹, 赵光辉¹, 刘桂武¹, 邵海成¹, 乔冠军^1,2

1 江苏大学材料科学与工程学院,镇江 212013;
2 西安交通大学金属材料强度国家重点实验室,西安 710049

Effect of Grinding Process on Surface Quality and Mechanical Properties of Al₂O₃ Ceramics

LIANG Jingjing¹, ZHANG Xiangzhao¹, ZHAO Guanghui¹, LIU Guiwu¹, SHAO Haicheng¹, QIAO Guanjun^1,2

1 School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China;
2 State Key Laboratory of Metal Material Strength, Xi’an Jiaotong University, Xi’an 710049, China

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摘要航空航天等领域的快速发展对Al₂O₃陶瓷表面加工质量的要求越来越高。目前,磨削加工由于精度高、材料去除率高而成为陶瓷表面加工最主要、最常用的方法,因此,建立磨削加工方式、陶瓷表面质量和力学性能之间的联系具有十分重要的意义。本工作利用精密研磨抛光机和磨床对Al₂O₃陶瓷进行表面加工,探讨了不同磨盘转速、磨盘/磨床砂轮目数、砂轮进刀量、磨床横向平移速度等不同磨削加工条件对陶瓷表面质量(材料表面粗糙度、表面形貌、表面残余应力)和力学性能的影响。研究结果表明:相比于磨盘加工,磨床加工对Al₂O₃陶瓷表面质量的影响较大,表现为磨床加工后的粗糙度数值较大,且磨削表面产生了较为明显的加工划痕。Al₂O₃陶瓷在磨削加工中的去除方式主要为脆性去除和延性域去除,加工后其表面残余应力均为压应力。特别地,在高的磨盘或砂轮目数、大的磨盘转速、较小的砂轮进刀量以及大的磨床平移速度情况下,Al₂O₃陶瓷以延性域去除为主,表面残余压应力最高达到-241 MPa。Al₂O₃陶瓷的力学性能是由表面粗糙度、表面微观形貌、表面残余应力共同作用的,随着陶瓷表面粗糙度的减小、残余压应力的增大,陶瓷弯曲强度提高,最高可达528 MPa。

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	乔冠军

关键词: Al₂O₃陶瓷磨削加工表面粗糙度残余应力弯曲强度

Abstract: Ahigher requirement for the surface quality of Al₂O₃ ceramic had been put forward to adapt the rapidly development in the aerospace or other fields. At present, the grinding process was one of the most commonly used methods for ceramic surface processing due to the high precision of grinding and high material removal rate. Therefore, it was greatly significant to clarify the relationship among grinding processing methods, surface quality and mechanical properties. The surface processing of Al₂O₃ ceramic was performed using the precision grinding/polishing machine and grinding machine. The effect of different grinding conditions involving grinding disc speed, the abrasive grain size of grinding disc or wheel, the longitudinal feed or horizontal translation speed of grinding wheel on the surface quality, surface residual stress and mechanical properties of Al₂O₃ ceramic were investigated and discussed. The experimental results show that a more rough surface (such as the processing scratches) was observed on the surface of Al₂O₃ ceramic after the grinding machine processing, indicating that the surface processing used by grin-ding machine had a greater influence on the surface quality of Al₂O₃ ceramic compared to the grinding disc processing. Furthermore, the removal mechanism of Al₂O₃ ceramics during grinding processing was a mixture of brittle removal and ductile removal, and the surface residual stresses exhibit compressive stress after processing. Especially, the removal mechanism of Al₂O₃ ceramics was mainly ductile removal and the surface residual compressive stress was up to -241 MPa in the case of fine abrasive grain size of grinding disc or wheel, large grinding disc rotation speed, small longitudinal feed and large horizontal translation speed of grinding wheel. The surface roughness, microstructure and surface residual stress had a comprehensive effect on the bending strength of Al₂O₃ ceramics. The bending strength increased to 528 MPa with decreasing the surface roughness and residual compressive stress of Al₂O₃ ceramic.

Key words: Al₂O₃ ceramics grinding process surface roughness residual stress bending strength

出版日期: 2020-08-25 发布日期: 2020-07-24

ZTFLH:	TG580
	TQ174

基金资助: 国家重点研发计划项目 (2017YFB0310400); 国家自然科学基金(51572112)

通讯作者: xzzhang2018@ujs.edu.cn

作者简介: 梁静静,2017年毕业于河南城建学院,获得工学学士学位。现为江苏大学材料科学与工程学院硕士研究生。目前主要研究领域为工程陶瓷材料的表面微加工。
张相召,江苏大学材料学院讲师。2018年获江苏大学博士学位,2017—2018年在东京工业大学联合培养。目前主要从事金属/陶瓷复合材料的高温润湿及钎焊、第一性原理计算等研究。目前在国内外学术期刊上发表论文20篇,合作申请专利9项;参与了一项国家自然科学基金(51572112)和一项江苏省自然科学基金(BK20151340)。

引用本文:

梁静静, 张相召, 赵光辉, 刘桂武, 邵海成, 乔冠军. 磨削加工对Al₂O₃陶瓷表面质量与力学性能的影响[J]. 材料导报, 2020, 34(16): 16020-16024.
LIANG Jingjing, ZHANG Xiangzhao, ZHAO Guanghui, LIU Guiwu, SHAO Haicheng, QIAO Guanjun. Effect of Grinding Process on Surface Quality and Mechanical Properties of Al₂O₃ Ceramics. Materials Reports, 2020, 34(16): 16020-16024.

链接本文:

http://www.mater-rep.com/CN/10.11896/cldb.19080144 或 http://www.mater-rep.com/CN/Y2020/V34/I16/16020

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