| LI Shu-qing,LI Qi-lian,HE Jin-sheng.Deposition Mechanism of Laser Hybrid Plasma Spraying Technology[J],48(4):110-115 |
| Deposition Mechanism of Laser Hybrid Plasma Spraying Technology |
| Received:August 26, 2018 Revised:April 20, 2019 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2019.04.016 |
| KeyWord:laser plasma spraying hybrid spraying coating WC-10Co4Cr bonding strength metallurgical bonding spraying mechanism |
| Author | Institution |
| LI Shu-qing |
Key Laboratory for Power Beam Process Technology, AVIC Manufacturing Technology Institute, Beijing , China |
| LI Qi-lian |
Key Laboratory for Power Beam Process Technology, AVIC Manufacturing Technology Institute, Beijing , China |
| HE Jin-sheng |
Key Laboratory for Power Beam Process Technology, AVIC Manufacturing Technology Institute, Beijing , China |
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| Abstract: |
| 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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