摘要
采用低能等离子喷涂技术，在不锈钢基体上制备WC-12％Co涂层。粉末被气体送到喷嘴内、阴极与阳极之间的区域，喷涂功率为3．9～9．1kW。利用XRD和SEM分析技术，对涂层的微观结构和相组成进行分析，研究喷涂功率对涂层硬度的影响。结果表明：在功率3．9kW时制备的涂层主要由WC相组成；喷涂功率在5-9kW时，涂层中开始出现W2C；在功率6．5kW时，涂层硬度最高为1500HV，喷涂功率超过6．5kW时，由于涂层中出现α-W2C，涂层的硬度降低。这表明低能等离子炬可以制备高性能的WC-Co涂层。
Conventional WC-12Co coating was sprayed on stainless steel substrate by low power plasma spraying system. The powders were sprayed at low power plasma （3.9-9.1 kW） and injected by carder gas in the region between the anode and cathode. The obtained coatings were examined by XRD, SEM to evaluate the microstructure and phase structure. The influence of plasma power on the coating＇s hardness was investigated. The results indicated that, WC phase appeared at low power （3.9 kW） and W2C phase at high power （5-9 kW）.The coating hardness increased to reach a value near 1 500 HV at plasma power of 6.5 kW. Over this power value the hardness slightly decreased mainly due to the increase of brittle -W2C phase.
出处
《中国表面工程》
EI
CAS
CSCD
2007年第2期51-54,共4页
China Surface Engineering
