喷涂距离及氧燃充枪比对爆炸喷涂Cr_(3)C_(2)-25NiCr涂层性能的影响  

Influence of Spraying Distance and Oxygen Fuel In-Gun Ratio on the Properties of Cr_(3)C_(2)-25NiCr Coatings Prepared by Detonation Spraying

作　　者：任佳奇 胡平生 李春光 乔志刚 崔永静 王天颖 王长亮 胡宇田 刘宇 REN Jiaqi;HU Pingsheng;LI Chunguang;QIAO Zhigang;CUI Yongjing;WANG Tianying;WANG Changliang;HU Yutian;LIU Yu(Key Laboratory of Advanced Corrosion and Protection for Aviation Materials,AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China;China Nuclear Power Operations Co.,Ltd.,Shenzhen 518000,Guangdong,China;Yangjiang Nuclear Power Co.,Ltd.,Yangjiang 529500,Guangdong,China)

机构地区：[1]中国航发北京航空材料研究院航空材料先进腐蚀与防护航空科技重点实验室,北京100095 [2]中广核核电运营有限公司,广东深圳518000 [3]阳江核电有限公司,广东阳江529500

出　　处：《热喷涂技术》2024年第1期71-79,共9页Thermal Spray Technology

摘　　要：采用爆炸喷涂技术制备了Cr_(3)C_(2)-25NiCr涂层,采用SEM测试、显微硬度测试、沉积效率测试、弯曲性能表征等手段研究了喷涂距离及氧燃充枪比对Cr_(3)C_(2)-25NiCr涂层性能的影响。结果表明,当喷涂距离为250 mm、氧燃充枪比为45%时,Cr_(3)C_(2)相熔融较为充分,制备的涂层性能最优,孔隙率仅为0.52%,显微硬度达878.6 HV 0.3。涂层沉积效率随喷涂距离增大而降低,随氧燃充枪比增大而上升。喷涂距离及氧燃充枪比对涂层弯曲性能无显著影响。The Cr_(3)C_(2)-25NiCr coatings were prepared by detonation gun spraying technology.The effects of spraying distance and oxygen fuel in-gun ratio on the properties of Cr_(3)C_(2)-25NiCr coatings were studied by SEM test,micro-hardness test,deposition efficiency test and bending property characterization.The results show that when the spraying distance is 250 mm and the oxygen fuel in-gun ratio is 45%,the melting of Cr_(3)C_(2)phase is sufficient,and the prepared coating has the best performance,The porosity of the coating is only 0.52%,and the micro-hardness is 878.6 HV 0.3.The deposition efficiency of the coating drops with the increase of spraying distance,and rises with the increase of the oxygen fuel in-gun ratio.The spraying distance and the oxygen fuel in-gun ratio have no significant effect on the bending properties of the coatings.

关 键 词：爆炸喷涂 喷涂距离 氧燃充枪比 Cr_(3)C_(2)-25NiCr涂层 孔隙率 显微硬度 沉积效率 弯曲性能 

分 类 号：TG174.4[金属学及工艺—金属表面处理]