Earticle

초록

영어

Recently, weight lightening is a key issue for various mechanical components to improve the fuel efficiency. For this reason, many researchers have been studying focused on the development of surface hardening treatment and metallic materials with high strength and wear resistance. In this study, we examine the formation of carbide at the surface of the gear machined by SCM420H steel after super- carburizing in order to improve the wear resistance of gear. The experimental results show that super- carburizing heat treatment gives rise to carbide dispersion across wider range of depth and higher carbon concentration than general carburizing heat treatment. Carbide having spheroidal or spherical shape had a size under 2 micro-meter produced in austenite grain boundaries or within austenite grains during super-carburizing. The super- carburized specimen maintained the hardness, HV700 above, at the 0.6mm depth and had a 10.4% lower coefficient of friction which was 0.766. This results from the dispersed carbide which lowered the coefficient of friction and ended up affecting wear resistance. Consequently, we conclude that super-carburizing heat treatment has more influence on the improvement of hardness, wear resistance compared to general carburizing heat treatment.

목차

ABSTRACT
 1. 서론
 2. 고농도 침탄 열처리
 3. 실험 조건 및 방법
  3.1 재질
  3.2 내마모 시험편
  3.3 열처리 작업조건
 4. 실험 결과 및 분석
  4.1 탄소 농도 분포
  4.2 경도 및 내부 탄화물분포
  4.3 내마모시험
 5. 결론
 References

키워드

저자

• 김범중 [ Beom-Jung Kim | Member, Department of Precision Mechanical Engineering, Gangneung-Wonju National Unversity ] Corresponding author
• 최덕기 [ Deok-Ki Choi | 21Century Gear Co., LTD. ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  한국기계항공기술학회지(구 한국기계기술학회지) [Journal of the Korean Society of Mechanical and Aviation Technology ]

• 간기

  격월간

• pISSN

  1229-604X

• eISSN

  2508-3805

• 수록기간

  1999~2026

• 등재여부

  KCI 등재

• 십진분류

  KDC 550 DDC 620