摘要
等离子弧的伏安特性决定电弧功率的大小,从而影响喷涂粒子的熔融状态,进而影响了涂层的质量。等离子喷涂过程电弧伏安特性受多种因素的影响。通过改变气体的种类和流量、喷嘴几何尺寸(孔径和压缩角)来研究这些因素对电弧伏安特性的影响。结果表明,电弧电压在一定范围内随着主气流量的增加而增加;氢气流量对电弧电压影响显著;氮气对电弧电压的影响比氩气大;在喷嘴总长度相同的情况下,电弧电压随着压缩角的增大而减小,随着孔径的减小而减小。
The volt-ampere characteristics deciding the electric arc power,which affect the fusion of the spraying powder and then influence the quality of coatings,are affected by many factors including gas species,gas flow rates,the nozzle's aperture and compression angle.So the factors influencing the volt-ampere characteristics were studied.The results showed that the arc voltage is increased with the primary gas flow rates in some range.The secondary gas flow rates have an important effect on the electric arc voltage.The influence of nitrogen on the arc voltage is more than argon when they are chose as the primary gas in plasma spraying.The arc voltage is decreased with the increase of the nozzle's compression angle and the decrease of the nozzle's aperture when the length of the nozzle is unvarying.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2007年第12期77-80,共4页
Transactions of The China Welding Institution
关键词
等离子弧
伏安特性
等离子喷涂
喷嘴
plasma arc
volt-ampere characteristic
air plasma spraying
nozzle
