Journal of Surface Science and Engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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Effect of tempering conditions on the tempering behavior and mechanical properties of tempered H13 steel

H13 강의 템퍼링 조건에 따른 템퍼링 거동 및 기계적 물성 효과

  • Gi-Hoon Kwon (Heat & Surface Technology R&D Group, Korea Institute of Industrial Technology) ;
  • Byoungho Choi (Heat & Surface Technology R&D Group, Korea Institute of Industrial Technology) ;
  • Yoon-Ho Son (Yujin SMC Co.) ;
  • Young-Kook Lee (Department of Materials Science and Engineering, Yonsei University) ;
  • Kyoungil Moon (Heat & Surface Technology R&D Group, Korea Institute of Industrial Technology)
  • 권기훈 (한국생산기술연구원 지능화뿌리기술연구소 주문형생산연구부문) ;
  • 최병호 (한국생산기술연구원 지능화뿌리기술연구소 주문형생산연구부문) ;
  • 손윤호 ((주) 유진 SMC ) ;
  • 이영국 (연세대학교 신소재공학과) ;
  • 문경일 (한국생산기술연구원 지능화뿌리기술연구소 주문형생산연구부문)
  • Received : 2024.04.15
  • Accepted : 2024.04.23
  • Published : 2024.04.30
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Abstract

Tempering behavior and mechanical properties in AISI H13 steel, quenched and tempered from 300 ℃ to 700 ℃ for different tempering time (1, 2, 5, 10, 20 hr) were quantitatively investigated by scanning electron microscopy (SEM), x-ray diffractometer (XRD), impact test machine, rockwell apparatus, ball-on-disk tester. Under the condition that the tempering time is 2 hours, the hardness increases slightly as the tempering temperature increases, but decreases rapidly when the tempering temperature exceeds 500 ℃, while the impact energy increases in proportion to the tempering temperature. Friction tests were conducted in dry condition with a load of 30 N, and the friction coefficient and wear rate according to tempering conditions were measured to prove the correlation with hardness and microstructure. In addition, primary tempering from 300 ℃ to 700 ℃ was performed at various times to establish a kinetic model to predict hardness under specific tempering conditions.

Keywords

Acknowledgement

본 연구는 한국산업단지공단 (KICOX)의 재원으로 경기 반월시화 스마트그린 산업단지 공정혁신 시뮬레이션센터 구축 및 운영 사업의 지원을 받아 수행한 연구입니다 (No: SG20230101).

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