전자기 연속 주조법을 이용한 의료용 타이타늄 합금 제작에 관한 연구

• Published in: 한국주조공학회지 Vol. 38; no. 1; pp. 9 - 15
• Main Authors: 최수지, Su-ji Choi, 이현재, Hyun-jae Lee, 백수현, Su-hyun Baek, 현승균, Soong-keun Hyun, 정현도, Hyun-do Jung, 문병문, Byung-moon Moon
• Format: Journal Article
• Language: Korean
• Published: 한국주조공학회 28.02.2018
• Subjects: Alloying; EMCC method; Mechanical properties; Microstructure; Ti-6Al-4V alloy; 금속공학; Mechanical properties; EMCC method; Alloying; Ti-6Al-4V alloy; Microstructure
• ISSN: 1598-706X; 2288-8381
• DOI: 10.7777/jkfs.2018.38.1.9

Electromagnetic continuous casting (EMCC) was used to fabricate Ti-6Al-4V alloys with properties suitable for medical applications. Ti-6Al-4V alloy ingots fabricated by EMCC were subjected to heat treatment, such as residual stress removing (RRS), furnace cooling after solution treatment (ST-FC) and water-cooling after solution treatment (ST-WC), in order to obtain characteristics suitable for the standard. After component analysis, the microstructure and mechanical properties (tensile strength and elongation) were evaluated by ICP, gas analysis, OM, SEM, a Rockwell hardness tester and universal testing machine. The Ti-6Al-4V alloy ingot fabricated by EMCC was fabricated without segregation, and the lamellar structure was observed in the RRS and ST-FC specimens. The ST-WC specimen showed only martensite structure. As a result of evaluating the mechanical properties based on the microstructure results, we found that the water-cooled heat treatment condition after the solution treatment was most suitable for the Ti-6Al-4V ELI standard.