Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
권호 표지
DOI QR코드

DOI QR Code

Surface Modification of AC4A Aluminum Alloy Castings Using Friction Thermomechanical Process

마찰열기계적 공정을 이용한 AC4A 합금의 표면개질

  • Yoon, Tae-Wook (Pyung Hwa Oil-seal Industry Co., Ltd.) ;
  • Ko, Young-Bong (Korea Testing & Research Institute) ;
  • Ko, Byung-Chun (Materials Science and Metallurgical Engineering of Kyungpook National University) ;
  • Park, Kyeung-Chae (Materials Science and Metallurgical Engineering of Kyungpook National University)
  • 윤태욱 (평화오일씰공업(주)) ;
  • 고영봉 (한국화학융합시험연구원) ;
  • 고병천 (경북대학교 금속신소재공학과) ;
  • 박경채 (경북대학교 금속신소재공학과)
  • Received : 2010.10.04
  • Accepted : 2010.10.30
  • Published : 2010.10.31
Download PDF
⟨ Previous Next ⟩

Abstract

FTMP(friction thermo-mechanical process) is an adaptation of friction stir welding, and can be used as a generic process to modify the microstructure at selective locations. In this study, in order to analyze characteristics of surface modification of ACA4 castings by FTMP, change of rotating speed(R/S) and traveling speed(T/S) of tool were applied as conditional parameter. Analysis of microstructure, hardness, surface roughness and depth of modified zone(MZ) were searched. The best condition were obtained at R/S 600 rpm and T/S 100 mm/min. At this time, hardness was 82 HV, the surface roughness was 0.07 mm and the depth at MZ was 1.72 mm. Free defects microstructure and fine Si particles formation and strong forging effects were analyzed at MZ.

Keywords

References

  1. 장웅성, 김흥주, RIST 연구논문, 18(1) (2004) 30.
  2. 박재철, 김성종, 한국표면공학회지, 42(1) (2009) 13.
  3. 박재철, 김성종, 한국표면공학회 2009년도 춘계학술대회논문집, (2009) 242.
  4. 권용재, 대한용접 접합학회지, 25(3) (2007) 6.
  5. 篠田 剛, 摩擦攪拌接合 FSWのすべて. 日本:社法人溶接, (2003) 189.
  6. 권용재, 대한용접 접합학회지, 26(6) (2008) 18.
  7. Y. J. Kwon, I. Shigematsu, N. Saito, J. Japan Inst. METALS, 66 (2002) 1325. https://doi.org/10.2320/jinstmet1952.66.12_1325
  8. Y. J. Kwon, I. Shigematsu, N. Saito, Mater. Lett., 62 (2008) 4458. https://doi.org/10.1016/j.matlet.2008.07.057
  9. 고영봉, 이중헌, 박경채, 대한용접 접합학회지, 27(6) (2009) 595.