摘要
采用团聚烧结法制备了一种含有纳米粒子的新型瓦楞辊专用WC-12Co喷涂粉末,并使用超音速火焰喷涂工艺(HVOF)制备了该粉末的两种涂层。测试了涂层的结合强度、显微硬度、气孔率、开裂韧性和单道次沉积厚度。并利用XRD对喷涂粉末及涂层进行了相结构分析,用扫描电子显微镜和金相显微镜对喷涂粉末、涂层的组织结构进行了观察,并与进口瓦楞辊专用粉末制备的涂层进行对比。结果表明:这种新型粉末的球形度好,具有很好的球形度和流动性;采用这种粉末制备的涂层具有沉积效率高、涂层的结合强度高、组织结构致密、硬度高和韧性好等特点,涂层主要性与国外瓦楞辊专用粉末制备的涂层性能相当,并且在粉末沉积率和涂层硬度方面还具有一定的优势。
A new kind of thermal spray powder WC-12Co with a small amount of nanostructured particles used in corrugated roller was produced by the agglomerating, sintering and crushing technology. The corresponding coatings were deposited by high velocity oxy-fuel spraying （HVOF）. The properties of bond strength, micro-hardness, porosity and fracture toughness and per pass thickness of the coatings were investigated; Phases of the feedstock powders and the coatings were analyzed by XRD. The characterizations of spraying feedstock powder and the microstructure of cross-section of coating were analyzed by OM. The results indicated that the spraying power exhibits sphere and has good flow rate, only a little of WC decomposed during spraying. Meanwhile, all the coatings exhibited excellent performance under various HVOF spraying parameters, such as high bond strength, micro-hardness, high depositing efficient, compact structure and moderate toughness, which has the similar performance compared with the coating prepared by the imported special powder used in the corrugated roller.
出处
《热喷涂技术》
2011年第3期54-59,共6页
Thermal Spray Technology
关键词
JP8000
喷涂粉
瓦楞辊
涂层
JP8000
Spraying powder
Corrugated roller
Coating
