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热喷涂技术:2020,12(1):39-44
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高速火焰喷涂WC-Co飞行粒子与涂层的物相分析
(1.北京矿冶科技集团有限公司,特种涂层材料与技术北京市重点实验室;2.北京矿冶科技集团有限公司,北京科技大学)
Study on Phase Distribution of WC-Co Flying Particles and Coatings during HVOF
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中文摘要: 本文用高速火焰喷涂方法 (HVOF) 对 WC-Co 粉末进行喷涂, 采用水冷法对喷涂中的飞行粒子进行收集, 并以 45# 钢为基体制备了相应涂层。 采用聚焦离子束 (FIB) 切割的方法, 分别制备了粉末、 飞行粒子和涂层的薄 片状透射电镜样品。 采用能谱检测了样品中各元素的分布情况, 选区电子衍射法鉴定了样品中的物相。 结果表明, W 和 C 元素在喷涂过程中向 Co 基体中扩散, 在冷却过程中与 Co 形成非晶相。 η 相在 WC 颗粒的边缘形成。
中文关键词: WC-Co  高速火焰喷涂  飞行粒子  涂层  η相  失碳
Abstract:In this paper, WC-Co powder was sprayed by the HVOF. In-flight particles were collected by water-cooling method, and the corresponding coating was prepared using 45# steel as the substrate. Using focused ion beam (FIB) cutting methods, thin-film TEM samples of powder, in-flight particles and coatings were prepared. The distribution of each element in the samples were detected by energy spectrum, and the phase in the samples were identified by selective electron diffraction. The results show that the W and C elements diffuse into the Co matrix during the spraying process and form an amorphous phase with Co during the cooling process. η phase forms at the edges of WC particles.
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杨延坤,于月光,高峰,鲍君峰,吴超.高速火焰喷涂WC-Co飞行粒子与涂层的物相分析[J].热喷涂技术,2020,12(1):39-44.
.Study on Phase Distribution of WC-Co Flying Particles and Coatings during HVOF[J].Thermal Spray Technology,2020,12(1):39-44.

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