李淑青,李其连,贺金生.激光等离子复合热源喷涂工艺沉积机理研究[J].表面技术,2019,48(4):110-115.
LI Shu-qing,LI Qi-lian,HE Jin-sheng.Deposition Mechanism of Laser Hybrid Plasma Spraying Technology[J].Surface Technology,2019,48(4):110-115 |
| 激光等离子复合热源喷涂工艺沉积机理研究 |
| Deposition Mechanism of Laser Hybrid Plasma Spraying Technology |
| 投稿时间：2018-08-26 修订日期：2019-04-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2019.04.016 |
| 中文关键词: 激光 等离子 复合热源 喷涂涂层 WC-10Co4Cr 结合力 冶金结合 沉积机理 |
| 英文关键词:laser plasma spraying hybrid spraying coating WC-10Co4Cr bonding strength metallurgical bonding spraying mechanism |
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| 中文摘要: |
| 目的 提高涂层的结合强度和改善微观组织结构。方法 选取WC-10Co4Cr喷涂材料，分别通过激光等离子复合热源喷涂工艺以及等离子喷涂工艺制备涂层，对涂层组织与基本性能进行检测，对两种不同喷涂工艺的沉积机理作对比分析研究。研究复合热源喷涂涂层微观组织结构以及涂层与基体间结合方式较等离子喷涂涂层的变化。利用高速摄像仪对激光等离子复合热源喷涂以及等离子喷涂的工艺过程进行跟踪监测和分析，研究复合热源沉积过程中，基体表面微熔池的形成及粉末粒子在不同沉积工艺过程中熔融状态的对比，分析等离子喷涂涂层和复合热源喷涂涂层的沉积机理。结果 等离子喷涂WC-10Co4Cr涂层以机械结合方式为主，涂层结合强度为39.5 MPa，孔隙率为1.7%，而激光等离子复合热源喷涂WC-10Co4Cr涂层实现了冶金结合，其结合强度提升到91 MPa，孔隙率降低到0.86%。结论 激光等离子复合热源喷涂工艺可以有效提升涂层的结合力，改善涂层组织致密性，更有利于涂层的耐磨耐腐蚀性能。 |
| 英文摘要: |
| The work aims to improve coatings’ bonding strength and modify the microstructure. The laser hybrid plasma spraying (LHPS) technology and air plasma spraying (APS) technology were utilized to deposit the coating by WC-10Co4Cr spraying materials. The coatings’ microstructure and basic performances were tested to analyze the deposition mechanism of the two spraying methods. The differences of microstructures and bonding methods to substrate of coatings by LHPS were mainly studied. The spraying procedures of LHPS and APS were traced and analyzed by the high speed camera. The differences of forming microwave on the substrate surface and the melting statement about the spraying particles during the depositing process were studied and compared. The deposition mechanism of LHPS and APS technologies was compared and analyzed. The APS WC-10Co4Cr coating’s main deposition mechanism was mechanical bonding method, with bonding strength of 39.5 MPa and the porosity of 1.7%. However, the LHPS WC-10Co4Cr coating achieved metallurgical bonding method, with improved bonding strength of 91 MPa and the decreased porosity of 0.86%. Laser hybrid plasma spraying can improve the coating’s bonding strength and porosity, which will be beneficial to improving the coating’s wear-resistant and corrosion-resistant performances. |
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