Proceedings of the Korean Institute of Surface Engineering Conference (한국표면공학회:학술대회논문집)

The Korean Institute of Surface Engineering (한국표면공학회)
권호 표지

Application of Ultrasonic Vibration Energy on Eco-superfinishing and Surface Hardening Treatment of Cold Work Roller

초음파 진동에너지를 이용한 냉간 압연롤러 표면의 환경 친화적 초정밀 사상 및 표면 경화 처리 및 시험

  • Y.S. Pyoun (Sunmoon University) ;
  • Park, J.H. (Sunmoon University) ;
  • C.H. Han (Sunmoon University) ;
  • Park, Y. (Sunmoon University) ;
  • I.S. Cho (DesignMecha Co., Ltd) ;
  • N. Azuma (DesignMecha Co., Ltd) ;
  • Lee, J.H. (DesignMecha Co., Ltd) ;
  • Kim, C.S. (DesignMecha Co., Ltd) ;
  • Park, C.H. (HwaChangSteel Co., Ltd)
  • Published : 2002.05.01
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Abstract

In order to improve wear and fatigue resistance of the structural materials, especially cold work roller for 304 stainless steel, an eco-super-finishing and surface hardening treatment using ultrasonic vibration energy was developed and applied to the SKD-ll roller. The eco-super-finishing machine was designed and fabricated by DesignMecha Co, by its own technology. It was observed that the surface roughness, hardness and residual stress were changed from $Ra{\;}={\;}O.25\mu\textrm{m}$, Hv=710 and ${\sigma}$={\;}+400{\;}MPa{\;}to{\;}Ra{\;}={\;}0.165\mu\textrm{m}$, Hv = 1200 and ${\sigma}=-610$ MPa after 20 KHz micro-cold forging, which means almost equal to the 300 % improvement of life-time.

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