| Title |
Effects of Intermediate Heat Treatment on the Corrosion and Mechanical Properties of Zr Alloy Strip Incorporating Nb |
| Authors |
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) |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
Zirconium alloy strip; cold rolling; intermediate heat treatment |
| 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. |