한국재료학회지 (Korean Journal of Materials Research)

  • 제11권11호
  • /
  • Pages.1001-1005
  • /
  • 2001
  • /
  • 1225-0562(pISSN)
  • /
  • 2287-7258(eISSN)
한국재료학회 (Materials Research Society of Korea)
권호 표지

40Cr 강의 Laser Surface Hardening 에 관한 연구

A Study on 40Cr Alloy steel of Laser Surface Hardening

  • 유능희 (한양대학교 공과대학 재료공학부) ;
  • 강성군 (한양대학교 공과대학 재료공학부)
  • Ryu, Nung-Hee (Division of Materials Science and Engineering, College of Engineering, Hanyang University) ;
  • Kang, Sung-Goon (Division of Materials Science and Engineering, College of Engineering, Hanyang University)
  • 발행 : 2001.11.01
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초록

In this study, the surface of 40Cr steel was hardened by $CO_2$Laser, and then the microstructural transformations and the hardness distributions of the laser surface hardened layer were observed. The experimental results showed the surface hardening layer was consisted of three parts, which is outmost surface layer of needle martensite, middle layer of martensite and remained pearlite, and transitory boundary layer. In hardness distributions, the surface hardeness of the surface hardening layer had Hv 800~1000, that was 2 to 4 times of matrix's hardness. The hardeness distribution of laser hardening layer that of surface layer hardened by general heat treatment.

키워드

참고문헌

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