Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Effects of Intermediate Heat Treatment on the Corrosion and Mechanical Properties of Zr Alloy Strip Incorporating Nb

니오븀이 첨가된 Zr 합금 스트립의 부식 및 기계적 특성에 대한 중간열처리 영향

  • 이명호 (한국원자력연구원 원자력융합기술개발부) ;
  • 정양일 (한국원자력연구원 원자력융합기술개발부) ;
  • 최병권 (한국원자력연구원 원자력융합기술개발부) ;
  • 박상윤 (한국원자력연구원 원자력융합기술개발부) ;
  • 김현길 (한국원자력연구원 원자력융합기술개발부) ;
  • 박정용 (한국원자력연구원 원자력융합기술개발부) ;
  • 정용환 (한국원자력연구원 원자력융합기술개발부)
  • Received : 2008.11.28
  • Published : 2009.08.25
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Abstract

In order to investigate the effects of intermediate heat treatment between cold rolling passes on the hardness and corrosion properties of a Zr alloy incorporating Nb (Zr-1.49Nb-0.38Sn-0.20Fe-0.11Cr) strip, three different intermediate heat treatment processes ($580^{\circ}C{\times}4hrs$, $600^{\circ}C{\times}2hrs$ and $620^{\circ}{\times}1hrs$) were designed based on a recrystallization map and an accumulated annealing parameter. Test samples from the different processes were investigated by a hardness test, corrosion test, and microstructure analysis and appropriate heat-treatment conditions were thereupon proposed. The sample subjected to an intermediate heat treatment of $580^{\circ}C{\times}4hrs$ was harder than that undergoing $600^{\circ}C{\times}2hrs$ and $620^{\circ}C{\times}1hr$ while the corrosion resistance of the sample that received an intermediate heat treatment of $580^{\circ}C{\times}4hrs$ was superior to that of the other specimens. Considering the trade-off of hardness and corrosion resistance, an intermediate heat treatment process of $600^{\circ}C{\times}2hrs$ is proposed to improve the manufacturing process of the alloy strip.

Keywords

Acknowledgement

Supported by : 교육과학기술부

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