열처리공학회지 (Journal of the Korean Society for Heat Treatment)

  • 제9권3호
  • /
  • Pages.177-186
  • /
  • 1996
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  • 1225-1070(pISSN)
  • /
  • 2508-4046(eISSN)
한국열처리공학회 (The Korean Society for Heat Treatment)
권호 표지

CO2 레이저를 이용한 Ti-6Al-4V합금의 TiN 및 TiC 가스 합금화

TiN and TiC Gas Alloying of Ti-6Al-4V Alloy by CO2 Laser

  • 송기홍 (전주공업전문대학 금형설계과) ;
  • 이오연 (전북대학교 공과대학 금속공학과)
  • Song, K.H. (Dept. of Die and Mold Design, Chunju Technical College) ;
  • Lee, O.Y. (Dept. of Metallurgical Engineering, Chunbuk National University)
  • 발행 : 1996.09.30
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초록

Surface alloying of Ti alloy by $CO_2$ laser is able to produce few hundred micrometers thick TiN or TiC surface-alloyed layer with high hardness on the substrate by injecting reaction gas($N_2$ or $CH_4$). Laser surface alloying by means of process control is in many applications essential in order to obtain predictable hardening layer. This research has been investigated the effect of such parameters on TiN and TiC gas alloying of Ti-6Al-4V alloy by $CO_2$ laser. The maximum surface hardness of TiN layer was obtained 1750Hv on the conditions of 0.8kW laser power, 0.8m/min scanning speed and 100% $N_2$ atmosphere. However, the maximum hardness of TiC formation layer after laser treatment was about 630Hv. As scanning speed was increased, the hardness and depth of these layers were decreased at constant laser power.

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