열처리공학회지 (Journal of the Korean Society for Heat Treatment)

  • 제5권1호
  • /
  • Pages.23-31
  • /
  • 1992
  • /
  • 1225-1070(pISSN)
  • /
  • 2508-4046(eISSN)
한국열처리공학회 (The Korean Society for Heat Treatment)
권호 표지

복합열처리(複合熱處理)한 연강(軟鋼)의 표면경화(表面硬化)에 관한 연구

A Study on Surface Case Hardening of Blend Heat Treated Mild Steel

  • 정인상 (경북대학교 공과대학 금속공학과) ;
  • 전해동 (경북대학교 공과대학 금속공학과) ;
  • 신석목 ((주) 열연금속)
  • Chung, In-Sang (Department of Metallurgical Engineering, Kyungpook National University) ;
  • Chon, Hae-Dong (Department of Metallurgical Engineering, Kyungpook National University) ;
  • Sin, Soug-Mok (Heat Treatment Research and Metal Co., Ltd.)
  • 발행 : 1992.03.31
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초록

It is investigated that Fe-C-N compound layer, defusion layer, and induction hardened layer produced by nitrocarburizing blend heat treatment in austenitic temperature with high frequency induction heating of mild steel specimen sprayed sursulf salt-bath. As the temperature of blend-heat treatment got increased, the thickness and hardness of compound layer and diffusion layer were increased. Compound layer(max. $35{\mu}m$), diffusion layer (max. 2.5mm) and induction hardened layer were gained in the shortest time 10 sec and in the case of $1000^{\circ}C$ total hardness depth of those was about 3.5mm. When the blend-heat treated specimen was reheated, maximum hardness of compound layer was dropped more than that of the reheated compound layer after sursulf treated, whereas hardness of diffusion layer was increased.

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