摘要
为了得到更高结合强度的等离子喷涂钼层,设计正交试验并优化参数,研究了主要参数(主气流量、辅气流量、距离、冷风嘴压力)、喷嘴型号、冷却速率对涂层结合强度的影响。结果表明:辅气与主气对涂层结合力影响最大;ф5.54 mm的GP喷嘴喷涂的钼涂层的结合强度比ф6.35 mm的GH喷嘴喷涂的钼涂层的更高;应采用较小的冷却速率以得到较高的钼涂层结合强度,以避免因冷速过大产生过多微观裂纹,减低涂层结合强度。
The orthogonal design approach was used to investigate the effects of main technical parameters of plasma spraying(primary gas,second gas,spraying distance and cooling pressure),nozzle model and cooling rate on the bond strength of molybdenum coating.Results showed that the second gas and primary gas had the greatest effects on bonding strength,and the bond strength of Mo coating under GP((?)5.54 mm) was higher than that under GH((?)6.35 mm).Moreover,lower cooling pressure should be used to avoid getting much more crack of microstructure that could reduce bond strength.
出处
《材料保护》
CAS
CSCD
北大核心
2016年第8期35-37,7,共3页
Materials Protection
关键词
等离子喷涂
钼涂层
正交试验
结合强度
plasma spraying
molybdenum coating
orthogonal design
bond strength
