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pISSN : 1598-706X / eISSN : 2288-8381


(논문)연구논문

한국주조공학회지 (21권1호 15-23)

Effects of Titanium, Hafnium and Zircornium Alloying Elements on Microstructures and D0₃↔B₂Transition Temperature of Fe-30Al-5Cr Alloys

Fe-30Al-5Cr 합금의 미세조직 및 D0₃↔B₂천이온도에 미치는 Ti, Hf 및 Zr의 첨가효과

Sung-Su Kim, Sung-Min Joo, Seon-Hun Oh, Kwan-Hyu Kim, Dap-Chun Choi

Chonnam National University

Abstract

The changes in the microstructures and Do3 H B2 transition temperature were investigated for Fe-3oat.%Al-5 at.%Cr alloy with the ordered Do3 structure when Ti, Hf and Zr were added respectively. The addition of Cr has no effect on the microstructure. However, as the amount of Ti addition increased, the grain size became smaller. Addition of Ti+Hf, Ti+Zr and Ti+Hf+ Zr also showed the similar effect. When 2oat.% of Ti was added, the second phase precipitates on the substrate. The addition of Cr, Hf and Zr alone has no effect on Do3 H B2 transition temperature. However, as the amount of Ti addition increased by 5, 10, l5 and 2oat.%, the transition temperatures showed 929, 930, 960 and 930"C respectively.

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