摘要
采用自行研制的高效能超音速等离子喷涂系统(HEPJet)制备了NiCr-Cr3C2涂层,并对涂层性能进行测试。结果表明,喷涂粒子速度高达460 m/s,实现了低功率、小气体流量获得超音速涂层的目的;HEPJet制备的NiCr-Cr3C2涂层其结合强度为60 MPa,显微硬度为926 HV0.3,沉积效率为54%,其抗高温氧化性能是12CrMoV钢的17倍,其常规性能赶超JP5000制备的NiCr-Cr3C2涂层。涂层表面的Cr2O3氧化膜与碳化物硬质相组成连续、致密而均匀的保护层是NiCr-Cr3C2涂层抗高温氧化性好的主要原因。
NiCr-Cr3C2 coating was fabricated by self-developed supersonic plasma spraying equipment（HEPJet）.The properties of the NiCr-Cr3C2 coating were measured.The results show that the particle velocity can reaches 460 m/s,the supersonic spraying can be realized by low power and little gas flux.Bonding strength of the coating is 60 MPa,micro-hardness is 926 HV0.3,deposition efficiency is 54%,and the thermal oxidation behavior of the NiCr-Cr3C2 coating is 17 times of 12CrMoV.These properties overtake JP5000＇s.Cr2O3 and carbide form a protective film,which is the main reason of the coating from thermal oxidation.
出处
《热加工工艺》
CSCD
北大核心
2011年第14期110-112,123,共4页
Hot Working Technology
基金
装备再制造国防科技重点实验室基金资助项目(9140C85-0201080C8503
9140C850205090C8502)
