Proceedings of the Korean Institute of Surface Engineering Conference (한국표면공학회:학술대회논문집)

The Korean Institute of Surface Engineering (한국표면공학회)
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H13소재의 쇼트피닝과 이온질화에의한 표면경화

  • 조균택 (한국생산기술연구원 열표면기술센터) ;
  • 손석원 (한국생산기술연구원 열표면기술센터) ;
  • 유광춘 (한국생산기술연구원 열표면기술센터) ;
  • 이영국 (연세대학교 신소재공학과) ;
  • 이원범 (한국생산기술연구원 열표면기술센터)
  • Published : 2012.11.08
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Abstract

Surface hardening mechanism of H13 steel was investigated when ion niriding after shot peening process was applied. Severe plastic deformation induced nanocrystallized grains at surface region. Higher nitrogen concentration was achieved in ion nitrided specimen with shot peening treatment than in single nitrided specimen. The elemental mapping on chromium and nitrogen by TEM-EELs showed chromium dissolved in matrix enhanced bulk nitrogen diffusion at surface region. Higher nitrogen diffusion also caused lattice distortion. Nano-sized grains, higher nitrogen concentration, and lattice diffustion contributed to the surface hardening.

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