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《Physical Testing and Chemical Analysis(Part A:Physical Testing)》 2018-02
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Determination of Phase Transformation Temperatures of Zr-Sn and Zr-Nb Zircaloys by Metallographic Method

MA Hongzheng;ZHAI Tongde;SHI Kexue;ZHANG Jing;SUN Xiaofeng;HOU Xiaoyu;WANG Feng;WANG Shaofeng;HE Wei;West Metal Materials Co.,Ltd.;  
The phase transformation temperature T_(α+β→β)from α + βphase toβphase of Zr-4 and N36 zircaloys was determined by metallographic method.The results show that the phase transformation temperature T_(α+β→β)of zircaloys could be determined by metallographic method.By quenching the samples at the temperatures near the phase transformation temperature T_(α+β→β)and then observing the change ofα phase contents,the temperature range of incomplete transformation and complete transformation ofαphase was determined,and the lower limit value of the temperature range was taken as the phase transformation temperature T_(α+β→β).The recommended heat treatment heating temperature interval was 10 ℃.The measured T_(α+β→β)of Zr-4 zircaloy was970 ℃,and the T_(α+β→β)of N36 zircaloy was 890 ℃.
【CateGory Index】: TG146.414
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