双硬质相材料Cr3C2-WC-NiCoCrMo热喷涂工艺研究
Study on Thermal Spraying Process of Dual Hard Phase Material Cr3C2-WC-NiCoCrMo
周伍喜 1史顺亮 1向新 1黄维 1雷勇1
作者信息
- 1. 自贡长城表面工程技术有限公司,四川 自贡 643011
- 折叠
摘要
采用团聚-烧结法制备了双硬质相材料Cr3C2-WC-NiCoCrMo热喷涂粉末,并利用超音速火焰(HVOF)喷涂技术制备了涂层,研究了粉末微观结构和热喷涂氧燃比(λ)对涂层显微组织和性能的影响.结果表明:随着烧结温度升高,喷涂粉末的松装密度和流动性增加,微观结构趋于致密;在热喷涂氧燃比固定为1.09的条件下,当喷涂粉末的烧结温度为1 295 ℃时,制备的涂层综合性能较好,显微硬度为(1 135.8±40.7)HV0.3,孔隙率为1.1％±0.1％;在喷涂粉末的烧结温度固定为1 295 ℃的条件下,当热喷涂氧燃比为1.0时,制备的涂层综合性能最好,其显微硬度为(1 145.8±39.6)HV0.3,沉积效率为 48.8％,孔隙率为 1.0％±0.1％.
Abstract
A dual hard phase material,Cr3C2-WC-NiCoCrMo thermal spraying powder,was prepared by ag-glomeration-sintering method,with the coating prepared by utilizing high-velocity oxygen-fuel(HVOF)spraying technology.And the effects of powder microstructure and oxygen-fuel ratio(λ)of thermal spra-ying on the microstructure and properties of the coating were studied.The results show that with an in-crease in sintering temperature,the apparent density and fluidity of the powder increase,leading to a denser microstructure.Under the condition of a fixed oxygen-fuel ratio of 1.09 during thermal spraying,the com-prehensive performance of the prepared coating is relatively excellent when the sintering temperature of the spraying powder is 1 295 ℃,with its microhardness of(1 135.8±40.7)HV0.3 and porosity of 1.1％± 0.1％.And under the condition of a fixed sintering temperature of the spraying powder of 1 295 ℃,the prepared coating with the oxygen-fuel ratio of 1.0 during thermal spraying has the optimal comprehensive performance,with a microhardness of(1 145.8±39.6)HV0.3,a deposition efficiency of 48.8％,and a po-rosity of 1.0％±0.1％.
关键词
热喷涂材料/Cr3C2-WC-NiCoCrMo粉末/烧结温度/超音速火焰喷涂/氧燃比/显微硬度/孔隙率Key words
thermal spraying material/Cr3C2-WC-NiCoCrMo powder/sintering temperature/high-velocity oxygen-fuel spraying/oxygen-fuel ratio/microhardness/porosity引用本文复制引用
出版年
2024
NETL
NSTL
万方数据