摘要
研究了氩气、压缩空气及氧气对1Cr18Ni9Ti热喷涂层性能的影响规律,并进一步分析了喷涂粒子氧化机理。结果发现,氩气作为雾化气体,喷涂粒子的雾化效果最好,粒径在20~40μm之间;氧气为雾化气体时,粒子雾化效果最差;氩气、压缩空气、氧气为雾化气体时,雾化粒子的含氧量分别为16.66%、25.34%、42.48%。粒子氧化主要发生在粒子的高温飞行阶段,氩气为雾化气体制备的涂层有Cr元素的扩散,结合面比较紧密,结合强度为12.5 MPa,而以压缩空气为雾化气体制备的涂层不存在Cr元素的扩散,结合面有明显的空隙,结合强度仅为5.8 MPa。
Effect of argon, compressed air and oxygen on 1Cr18Ni9Ti thermal spraying layer performance was studied. Furthermore, spray particle oxidation mechanism was analyzed. The results indicated that spray particle atomization is best when the atomization gas is argon,which particle size is between 20-40 txm. When the atomizing gas is oxygen, particle atomization is worst. The argon, compressed air, oxygen as the atomizing gas, the oxygen of atomized particles were 16.66%, 25.34%, 42.48%. Oxidation occurs mainly in the high-temperature phases of flight particles. The argon as the atomizing gas, the coating prepared is with diffusion of Cr, combined with the surface more closely, the bonding strength of 12.5 MPa. While the compressed air is the atomizing gas, and diffusion of Cr element does not exist. There are obvious gaps joint surface, combined strength of only 5.8 MPa.
出处
《中国铸造装备与技术》
CAS
2016年第4期49-52,共4页
China Foundry Machinery & Technology
关键词
电弧喷涂
雾化气体
氧化
结合强度
arc spraying
atomizing gas
oxidation
bond strength