한국주조공학회지 (Journal of Korea Foundry Society)

  • 제23권4호
  • /
  • Pages.204-211
  • /
  • 2003
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  • 1598-706X(pISSN)
  • /
  • 2288-8381(eISSN)
한국주조공학회 (Korea Foundry Society)
권호 표지

Ti-Nb계 합금의 미세조직 및 경도변화에 미치는 열처리 조건의 영향

The Effect of the Heat Treatment Conditions on the Microstructure and Hardness of Ti-Nb Alloys

  • 이도재 (전남대학교 공과대학 금속공학과) ;
  • 이경구 (전남대학교 공과대학 금속공학과) ;
  • 이광민 (전남대학교 공과대학 금속공학과) ;
  • 황주영 (전남대학교 공과대학 금속공학과)
  • Lee, Doh-Jae (Dept. of Metallurgical Engineering, Chonnam National University) ;
  • Lee, Kyung-Ku (Dept. of Metallurgical Engineering, Chonnam National University) ;
  • Lee, Kwang-Min (Dept. of Metallurgical Engineering, Chonnam National University) ;
  • Hwang, Ju-Young (Dept. of Metallurgical Engineering, Chonnam National University)
  • 발행 : 2003.08.20
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초록

Ti-3wt.%Nb(${\alpha}$type), Ti-20wt.%Nb(${\alpha}+{\beta}$,type) and Ti-40wt.%Nb(${\beta}$type) alloys were melted by vacuum are remelting. The specimens were homogenized at 1050$^{\circ}C$ for 24 hr and were then hot rolled to 50% reduction. Each alloys were solution heat treated at ${\beta}$ zone and ${\alpha}+{\beta}$, zone after homogenization, and then aged. The microstructural and hardness changes in Ti-Nb alloys with Nb contents were investigated by SEM, XRD and hardness tester. The microstructural change from equiaxied to acicular and the increase of ${\beta}$ phase in Ti-Nb alloys were obtained when the Nb content increased. The higher hardness value of ${\alpha}+{\beta}$type alloy was obtained compared to the other alloys.

키워드

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