Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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Comparison of Mechanical properties and Surface Friction of White Metals Produced by Centrifugal and Laser Cladded on SCM440

원심주조방식과 레이저 클래딩 증착법을 통한 화이트메탈의 기계 및 마찰특성 비교

  • Jeong, Jae-Il (Korea Institute of Industrial Technology (KITECH)) ;
  • Kim, Dong-Hyuk (Korea Institute of Industrial Technology (KITECH)) ;
  • Park, Jin-Young (Korea Institute of Industrial Technology (KITECH)) ;
  • Oh, Joo-Young (Korea Institute of Industrial Technology (KITECH)) ;
  • Choi, Si-Geun (Korea Institute of Industrial Technology (KITECH)) ;
  • Kim, Seock-Sam (Department of Mechanical Engineering, Faculty of Engineering, Universiti Malaysia Sabah) ;
  • Cho, Young Tae (Changwon National University, College of Mechatronics Engineering, Mechanical Engineering) ;
  • Lee, Ho (Kyungpook National University, College of Mechatronics Engineering, Mechanical Engineering) ;
  • Ham, Seung-Sik (Kyungpook National University, College of Mechatronics Engineering, Mechanical Engineering) ;
  • Kim, Jong-Hyoung (Korea Institute of Industrial Technology (KITECH))
  • Received : 2018.03.31
  • Accepted : 2018.05.05
  • Published : 2018.06.30
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Abstract

Bearings are essential for reducing vibration and wear, in order to achieve high durability and increase longevity. White metal treatment of tilting pads via centrifugal casting method has the possibility of increasing durability. However, this manufacturing method has drawbacks such as long processing time, high defect rate, and harmful health effects. Laser cladding deposition technique is a powerful method that can address these issues by decreasing the processing time and providing good adhesion. In this study, we suggest optimum conditions for laser cladding deposition that can be used in industrial applications. We deposited a soft white metal layer on SCM440 that is primarily used in shafts to minimize wear of bearing pads. During the laser deposition process, we controlled factors such as laser power, powder feed rate, and laser head speed to determine the optimum conditions. In addition, we measured the hardness using micro Vickers, and performed field emission scanning electron microscopy, energy dispersive X-ray spectroscopy, X-ray diffraction, and friction tests to investigate the mechanical properties and surface characteristics for different parameters. Based on the experimental results, we suggest that laser power, powder feed rate, and laser head speed of 1.3 kW, 2.5 rpm, and 10 mm/s, respectively, constitute the optimum conditions for producing white metals using laser cladding.

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References

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