• Title/Summary/Keyword: Eyerim

Search Result 2, Processing Time 0.015 seconds

Study on The Manufacturing of The Titanium-Alloyed Eyerim (티타늄 합금 안경테홈선 제조에 관한 연구)

  • Kim, Sang-Yeoun
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.12 no.3
    • /
    • pp.1058-1062
    • /
    • 2011
  • After the design and production of cold rolling to make titanium-alloyed(Gr.9) eyerim, the function of the roller was evaluated. The surface roughness values of the roller of Ra was $0.05{\sim}0.156{\mu}m$ and of Rz was $0.23{\sim}067{\mu}m$. The values showed a satisfactory result compared with the surface roughness values Ra was $0.04{\mu}m$ and Rz was $0.3{\mu}m$ which was measured after barrel polishing for the titanium eyeglasses frame PVD (Physical Vapor Deposition) gilding. As a result of cold rolling of Ti-3Al-2.5V (Half Titanium), the degree of hardness increased to 221Hv, 247Hv(1st), 270Hv(2nd), etc. Therefore, it was found that proper heat treatment and multi-stand rolling process are necessary.

A Study on The Φ 9mm Titanium Alloy Wire (9mm 합금타이타늄 중간 선재 연구)

  • Kim, Sang-Yeoun
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.13 no.1
    • /
    • pp.8-13
    • /
    • 2012
  • Ti-3Al-2.5V ingot was produced, processed into a titanium alloy wire of 9mm diameter, and the characteristics were studied in comparison with imported material. The ingot satisfied ASTM Grade 9 standard showing oxygen content of 0.11wt% and iron content of 0.085wt%. The hardness of the 9mm diameter titanium alloy was similar to that of the imported material showing values between 225 and 250Hv, and the tensile strength of the imported material was 804MPa while that of the domestic development was 734MPa. The elongation of the imported material was 12% while that of the domestic development was 22%. A new process of manufacturing 9.0mm diameter titanium alloy wire through forging and multi-step hot rolling process out of 400mm diameter ingot was developed.