程正明,刘敏,邓春明,张吉阜,林秋生,邓畅光.喷距对低温超音速火焰喷涂钛涂层显微结构与性能的影响[J].表面技术,2014,43(2):13-17.
CHENG Zheng-ming,LIU Min,DENG Chun-ming,ZHANG Ji-fu,LIN Qiu-sheng,DENG Chang-guang.Effects of Spray Distance on the Microstructure and Property of LT-HVOF Ti Coating[J].Surface Technology,2014,43(2):13-17
喷距对低温超音速火焰喷涂钛涂层显微结构与性能的影响
Effects of Spray Distance on the Microstructure and Property of LT-HVOF Ti Coating
投稿时间:2013-10-15  修订日期:2014-04-10
DOI:
中文关键词:  低温超音速火焰喷涂  喷距  钛涂层  扁平化
英文关键词:low temperature HVOF (LT-HVOF)  spray distance  Ti coating  flattening
基金项目:广东省自然科学基金资助项目(10151065101000002)
作者单位
程正明 1. 华南理工大学, 广州 510640; 2. 广州有色金属研究院, 广州 510650 
刘敏 广州有色金属研究院, 广州 510650 
邓春明 广州有色金属研究院, 广州 510650 
张吉阜 广州有色金属研究院, 广州 510650 
林秋生 广州有色金属研究院, 广州 510650 
邓畅光 广州有色金属研究院, 广州 510650 
AuthorInstitution
CHENG Zheng-ming 1. South China University of Technology, Guangzhou 510640, China;2. Guangzhou Research Institute of Non-Ferrous Metals, Guangzhou 510650, China 
LIU Min Guangzhou Research Institute of Non-Ferrous Metals, Guangzhou 510650, China 
DENG Chun-ming Guangzhou Research Institute of Non-Ferrous Metals, Guangzhou 510650, China 
ZHANG Ji-fu Guangzhou Research Institute of Non-Ferrous Metals, Guangzhou 510650, China 
LIN Qiu-sheng Guangzhou Research Institute of Non-Ferrous Metals, Guangzhou 510650, China 
DENG Chang-guang Guangzhou Research Institute of Non-Ferrous Metals, Guangzhou 510650, China 
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中文摘要:
      目的 分析喷距对钛涂层显微结构和性能的影响。 方法 采用低温超音速火焰喷涂工艺,在不同的喷距下制备钛涂层,分析钛涂层的显微组织、相结构及显微硬度,探讨涂层受喷距影响的机制。 结果低温超音速火焰喷涂钛涂层的表面粗糙度较高,涂层的孔隙率随喷距的增加呈先减小、后增大的趋势,当喷距为 150 mm 时,涂层的孔隙率最小。 钛涂层没有发生明显的氧化,粒子主要以固态形式沉积。结论 当喷距为 150 mm 时,粒子在焰流中加热较为充分,同时具有较高的飞行速度,粒子的扁平化程度高,因此涂层具有较高的致密度。
英文摘要:
      Objective To study the effects of spray distance on the microstructure and property of Ti coatings. Methods Ti coatings were prepared at different spray distances by Low Temperature HVOF process. The microstructure, phase structure and microhardness of the coatings were analyzed. Besides, the influence mechanism of spray distance on Ti coatings was discussed. Results The results showed that LT-HVOF Ti coatings had relatively high surface roughness, and the porosity of the coatings first decreased and then increased with the increase of spray distances, and the minimum porosity of the coating was 0. 70% at the spray distance of 150 mm; no obvious oxidation was observed in Ti coatings; the splats deposited on the substrate were mainly in its solid state. Conclusion When the spray distance was 150 mm, Ti particles were sufficiently heated in plume and had a high in-flight velocity, so Ti splats were well flattened to form dense Ti coating.
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