WANG Xiaohui,LI Xinmei*,ZHANG Jing.Effect of Spray Distance on Microstructure and Wear Properties of Al2O3-TiO2 Coating[J].Plating & Finishing,2019,(11):1-5.[doi:10.3969/j.issn.1001-3849.2019.11.001]
喷涂距离对Al2O3-TiO2涂层组织与干摩擦性能的影响
- Title:
- Effect of Spray Distance on Microstructure and Wear Properties of Al2O3-TiO2 Coating
- Keywords:
- atmospheric plasma spraying; micro-hardness; dry friction and wear; micro-ploughing; ploughing effect
- 文献标志码:
- A
- 摘要:
- 采用大气等离子喷涂（APS）方法在Q235钢基体上制备了不同喷涂距离的Al2O3-13 wt %TiO2涂层。研究了喷涂距离对涂层α-Al2O3相质量分数、涂层截面显微硬度、孔隙率、沉积厚度的影响，并对涂层进行干摩擦磨损实验，分析了涂层磨损失效机理。随着喷涂距离的增加，α-Al2O3相向γ-Al2O3相转化增多，涂层沉积厚度呈下降趋势。喷涂距离为130 mm时，涂层综合性能最优；沉积厚度为285 μm，截面显微硬度为1172 HV0.2，孔隙率为3.4 %，涂层耐磨性能最佳，磨损失效主要以显微犁削为主。喷涂距离为110 mm时涂层熔融程度不足，犁沟效应明显，喷涂距离为150 mm时γ-Al2O3相较多，脆性断裂显著。
- Abstract:
- Al2O3-13 wt %TiO2 coatings with different spraying distances were prepared on Q235 steel substrates by atmospheric plasma spraying (APS). Systematically investigations of the mass fraction of α-Al2O3, micro-hardness, porosity and deposition thickness of the coatings in different spraying distances were carried out. The dry friction and wear experiments were studied and the wear failure mechanism of the coatings was analyzed. The results showed that with the increase of spraying distance, the phase transformation from α-Al2O3 to γ-Al2O3 was increased, and the deposition thickness of the coating was decreased. When the spraying distance was 130 mm, the coating had the best comprehensive properties. When the deposition thickness was 285 μm, the micro-hardness of the cross section was 1172 HV0.2, and the porosity was 3.4 %, the wear loss of the coating was the least. The main wear failure of coating was micro-ploughing. When the spraying distance was 110 mm, the fusion of coatings was insufficient and ploughing effect was obvious. When the spraying distance was 150 mm, the phase of γ-Al2O3 was increased and brittle fracture was obvious.
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备注/Memo
收稿日期： 2019-05-15；修回日期： 2019-06-28
作者简介： 王晓辉（1991-），男，硕士，email: 2534991506 @qq.com
通信作者： 李新梅， email:lxmxj2009@126.com
基金项目： 国家自然科学基金（51865055； 51561029）