NiCrAlY合金粉添加量对超音速火焰喷涂WC-10Co4Cr涂层组织及性能的影响
Effect of NiCrAlY Alloy Powder Addition Amount on Microstructure and Properties of High Velocity Oxygen Fuel Sprayed WC-10Co4Cr Coating
摘 要
在WC-10Co4Cr金属陶瓷粉中添加不同质量分数（0，6.5%，10.0%，20.0%） NiCrAlY合金粉，采用超音速火焰喷涂技术在316L不锈钢基体表面制备NiCrAlY/WC-10Co4Cr金属陶瓷涂层，研究了合金粉添加量对涂层显微组织、显微硬度和耐腐蚀性能的影响。结果表明：不同合金粉添加量下所得涂层的显微组织均主要由WC相组成；随着合金粉添加量的增加，涂层中的镍和Ni3Al相含量增多，孔隙率和硬度下降，耐腐蚀性能先增后降；当合金粉质量分数为6.5%时，涂层的硬度分布最均匀，耐腐蚀性能最好。
NiCrAlY合金粉
超音速火焰喷涂
显微组织
耐腐蚀性能
WC-10Co4Cr cermet
NiCrAlY alloy powder
high velocity oxygen fuel spraying
microstructure
corrosion resistance
Abstract
The NiCrAlY alloy powder with different mass fractions (0,6.5wt%,10.0wt%,20.0wt%) was added into the WC-10Co4Cr cermet powder, and then NiCrAlY/WC-10Co4Cr cermet coatings were prepared on surface of 316L stainless steel substrate by high velocity oxygen fuel spraying technique. The effects of the alloy powder addition amount on the microstructure, microhardness and corrosion resistance of the coatings were investigated. The results show that the microstructures of the coatings with different addition amounts of the alloy powder were mainly composed of WC phase. With the increase of addition amount of the alloy powder, the content of Ni and Ni3Al phases in the coating increased, the porosity and hardness of the coating decreased, and the corrosion resistance increased and then decreased. When the mass fraction of the alloy powder was 6.5%, the coating had the highest uniform distribution of the hardness and the best corrosion resistance.
中图分类号 TG174.4 DOI 10.11973/jxgccl201810008
所属栏目 新材料 新工艺
基金项目 国家高技术研究发展计划资助项目（2015AA034405）
收稿日期 2017/12/8
修改稿日期 2018/9/6
网络出版日期
作者单位点击查看
备注司永礼(1992-),男,安徽凤阳人,硕士研究生
引用该论文: SI Yongli,WANG Xingfu,HAN Fusheng,LI Zhizhong,FENG Guobao. Effect of NiCrAlY Alloy Powder Addition Amount on Microstructure and Properties of High Velocity Oxygen Fuel Sprayed WC-10Co4Cr Coating[J]. Materials for mechancial engineering, 2018, 42(10): 41～45
司永礼,王幸福,韩福生,李志忠,凤国保. NiCrAlY合金粉添加量对超音速火焰喷涂WC-10Co4Cr涂层组织及性能的影响[J]. 机械工程材料, 2018, 42(10): 41～45
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