보로나이징처리에 따른 Inconel 625 초합금강의 기계적 특성 향상

• Published in: Biuletyn Uniejowski Vol. 52; no. 6; pp. 316 - 320
• Main Authors: 김대욱(Dae-Wook Kim), 김유성(Yu-Sung Kim), 이인식(In-Sik Lee), 차여훈(Yeo-Hun Cha), 정경훈(Kyeong-Hoon Jeong), 차병철(Byung-Chul Cha)
• Format: Journal Article
• Language: Korean
• Published: 한국표면공학회 2019
• Subjects: 기계공학; Mechanical properties; Surface modification; Ni-based superalloy; Boronizing
• ISSN: 1225-8024; 2299-8403; 2288-8403
• DOI: 10.5695/JKISE.2019.52.6.316

The effect of boronizing on mechanical properties including wear behavior and hardness of Inconel 625 superalloy were investigated. The cross-section observation demonstrated that boronized samples were composed of multi-phase boride layer (CrxBx, Ni2B), diffusion layer, and substrate. The boride and diffusion layers were increased with increasing treatment temperature and holding time. However, CrxBx layer was partially peeled off when it treated 1000℃. Subsequently, boride layer was completely separated from substrate with increasing temperature and time. A partial peeling of CrxBx layer is not noticeably degraded mechanical properties. In particular, friction coefficient and wear resistance were enhanced in lack of CrxBx phase. Therefore, these results suggest that a Ni2B phase mainly contribute to wear behavior on boronized Inconel 625 superalloy.