Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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Effect of Gun Nozzle Movement Speed in HVOF Process on the properties of Coating Thickness and Surface

HVOF 용사 건의 이동속도가 WC-Co 코팅층의 두께 형성 및 표면 특성에 미치는 영향

  • Kim, Kibeom (Department of Marine design Convergence Engineering, Pukyong National University) ;
  • Kim, Kapbae (KETECH Co., Ltd) ;
  • Jung, Jongmin (Department of Industrial Facility Automation, Ulsan Campus of Korea Polytechnic) ;
  • Kim, Kwonhoo (Department of Metallurgical Engineering, Pukyong National University)
  • 김기범 (부경대학교 마린융합디자인공학과) ;
  • 김갑배 ((주)케이테크) ;
  • 정종민 (한국폴리텍대학 울산캠퍼스 산업설비자동화과) ;
  • 김권후 (부경대학교 공과대학 금속공학과)
  • Received : 2022.09.14
  • Accepted : 2022.09.15
  • Published : 2022.09.30
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Abstract

In order to process materials such as engineering plastics, which are difficult to mold due to their high strength compared to conventional polymer materials, it is necessary to improve the hardness and strength of parts such as screws and barrels of injection equipment in extrusion system. High-velocity oxygen fuel (HVOF) process is well known for its contribution on enhancement of surface properties. Thus in this study, using the HVOF process, WC coating layers of different thicknesses were bonded to the surface of S30C substrate by controlling the movement speed of the spray nozzle and each property was evaluated to decide the optimization condition. Through the results, the thickness of WC coating layer increased from 0 to 200 ㎛ maximum, along with the decrement of nozzle movement speed and the surface hardness get increased. Especially, the coated layer with the thickness over 180 ㎛ under the nozzle speed 500 mm/s had high hardness than thinner layer. In addition, the amount of wear consumed per unit time was also significantly reduced due to the formation of the coating layer.

Keywords

Acknowledgement

이 논문은 2020년도 정부(산업통상자원부)의 재원으로 한국산업기술평가 관리원 소재부품기술개발 사업(2020-469/20013665)의 지원을 받아 수행되고 게재된 연구임.

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