摘要
运用热辐射法测定了超音速火焰喷涂Cr3C2-NiCr粒子速度,研究了燃气流量、氧气流量和喷涂距离对粒子速度的影响规律,结果表明,燃气流量、氧气流量对粒子速度具有显著影响,当燃气流量在37～46L/min范围内增加,氧气流量在368～447L/min范围内增加时,粒子速度上升显著。适中的氧气流量有利于获得较高的粒子速度。粒子速度随喷涂距离呈现先增加后减小的变化规律,粒子的加速过程主要在距枪口160mm的范围内进行。
Effects of fuel gas flow, oxygen flow and spray distance on the flight velocity of Cr_3C_2-NiCr particles in high velocity oxy-fuel spraying were experimentally studied by thermal radiation method. Results show that the propane flow, oxygen flow and spray distance affect the particle velocity considerably. The velocity increment of in-flight particles is comparatively obvious while the propane flow increases from 37 L/min to 46 L/min and the oxygen flow from 368 L/min to 447 L/min. The moderate oxygen flow makes for comparative high velocity. With the increase of spray distance, the variation of in-flight particle velocity exhibits a convex curve, and the acceleration effect of particle occurs within 160 mm distanee from the nozzle.
出处
《材料保护》
CAS
CSCD
北大核心
2004年第11期29-31,共3页
Materials Protection
基金
国家自然科学基金资助(59676061)
