Journal of Welding and Joining

  • 제18권5호
  • /
  • Pages.105-111
  • /
  • 2000
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  • 2466-2232(pISSN)
  • /
  • 2466-2100(eISSN)
대한용접접합학회 (The Korean Welding and Joining Society)
권호 표지

AlSiMg/TiC 복합 용사피막 : 마모 특성 (II)

Thermal Sprayed AlSiMg/TiC Composite Coatings : Wear Characteristics (II)

  • 양병모 (경북대학교 금속공학과) ;
  • 변응선 (한국기계연구원 표면기술연구부) ;
  • 박경채 (경북대학교 금속공학과)
  • 발행 : 2000.10.01
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초록

The wear behavior of thermal sprayed AlSiMg-40TiC composite coatings were studied as a function of load and sliding velocity under unlubricated conditions. Experiments were performed using a block-on-ring(WC-6wt%/Co, Hv 1500) type. The tests were carried out a various load(30∼ 125.5N) and sliding velocity(0.5∼2.0m/s). Three wear rate regions were observed in the AlSiMg-40TiC composite coatings. The wear rate in region I at low load (less then 8N( were less than 1×{TEX}$10^{-5}${/TEX}㎣/m. Low wear rates in region I resulted from the load-bearing capacity of TiC particles. The transition from region I to II occurred when the applied load exceeded the fracture and pull-out strength of the particles. The TiC fractured particles trapped between the specimen and the counterface acted as third-body abrasive wear. The subsurface layer worn surface in region II was composed of the mechanically mixed layer (MML). The wear rate increase abruptly above a critical load (region III). The high wear rate in region III was induced by frictional temperature and involves massive surface damage.

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참고문헌

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