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Vol.47, No.8, 482 ~ 488, 2009
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| Title |
| Effects of Intermediate Heat Treatment on the Corrosion and Mechanical Properties of Zr Alloy Strip Incorporating Nb |
| 이명호 Myung Ho Lee , 정양일 Yang Il Jung , 최병권 Byoung Kwon Choi , 박상윤 Sang Yoon Park , 김현길 Hyun Gil Kim , 박정용 Jeong Yong Park , 정용환 Yong Hwan Jeong |
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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℃×4 hrs, 600℃×2 hrs and 620℃×1 hrs) 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℃×4 hrs was harder than that undergoing 600℃×2 hrs and 620℃×1 hr while the corrosion resistance of the sample that received an intermediate heat treatment of 580℃×4 hrs was superior to that of the other specimens. Considering the trade-off of hardness and corrosion resistance, an intermediate heat treatment process of 600℃×2 hrs is proposed to improve the manufacturing process of the alloy strip. |
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| Key Words |
| Zirconium alloy strip, cold rolling, intermediate heat treatment |
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