전자기 연속 주조법을 이용한 의료용 타이타늄 합금 제작에 관한 연구

초록

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), furnacecooling after solution treatment (ST-FC) and water-cooling after solution treatment (ST-WC), in order to obtain characteristicssuitable 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 alloyingot 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 themicrostructure results, we found that the water-cooled heat treatment condition after the solution treatment was most suitable for theTi-6Al-4V ELI standard.

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