| 摘要: |
| Cr3C2-NiCr涂层是中高温下理想的耐磨、抗氧化、耐蚀涂层,常用于高温下的燃气冲蚀磨损、磨粒磨损、微动磨损、硬表面磨损等场合.文中采用超音速等离子喷涂的方法在CuCrZr合金表面制备Cr3C2-NiCr涂层,并采用超声冲击的方法对涂层进行后处理.结果表明,经超声冲击处理后,涂层孔隙率由2.34%降低至1.83%;涂层的平均显微硬度由8.9 GPa提高至9.6 GPa,且硬度分布更均匀;在650℃下进行热震试验,涂层的热震寿命显著提高,热震裂纹的扩展路径也发生了变化. |
| 关键词: 超声冲击处理 超音速等离子喷涂 Cr3C2-NiCr涂层 涂层性能 |
| DOI： |
| 分类号: |
| 基金项目:江苏高校优势学科建设工程资助项目 |
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| Properties improvement of supersonic plasma spraying Cr3C2-NiCr coating by ultrasonic impact treatment |
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CHEN Jian1, LV Lin2, CUI Ting3, MA Wanbin1, SHI Hesheng2
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1.Provicial Laboratory of Advanced Welding Technology, Jiangsu University of Science and Technology, Zhenjiang 212003, China;2.Nan Jing Run Bang Clad Metal Material Co., Ltd, Nanjing 211803, China;3.The Changzhou Haojue Suzuki Motorcycle Co., Ltd, Changzhou 213022, China
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| Abstract: |
| For the ideal resistance characteristics to wear, oxidation and corrosion,Cr3C2-NiCr coating has been widely used in the gas erosive wear,abrasive wear,fretting wear and hard surface wear under high temperature conditions. In this paper, Cr3C2-NiCr coating on CuCrZr was obtained by supersonic plasma-spraying method,and the post-processing ultrasonic impact treatment was utilized to certain coating. The results show that porosity of the coating decreases from 2.34 percent to 1.83 percent,and average micro-hardness of coating increases from 8.9 GPa to 9.6 GPa and hardness distribution becomes uniform. Coating thermal shock life at 650℃ improves markedly; meanwhile, crack path of thermal shock also changes. |
| Key words: ultrasonic impact treatment supersonic plasma spraying Cr3C2-NiCr coating coating properties |
