Phase stability of reduced activation ferritic steel: 8%Cr-2%W-0.2%V-0.04%Ta-Fe
Phase stability of reduced activation ferritic steel: 8%Cr-2%W-0.2%V-0.04%Ta-Fe
复制标题
相%20稳定性%20的%20减少%20活化%20铁素体%20钢：%208%Cr-2%W-0.2%V-0.04%Ta-Fe
DOI：
10.1016/0022-3115(88)90384-4
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发表时间：
1988
影响因子：
3.1
通讯作者：
T. Kondo
中科院分区：
文献类型：
--
作者：
M. Tamura;H. Hayakawa;A. Yoshitake;A. Hishinuma;T. Kondo
对8 Cr-2 W-0.2V-0. 04 Ta-Fe低活化铁素体钢在673-923 K进行时效处理。并对时效后的试样进行了夏比冲击试验和金相分析。并与12 Cr-1 Mo-V-W、9 Cr-1 Mo-V-Nb和不含Ta的8 Cr-2 W-0.2V钢的结果进行了比较。随着时效时间和时效温度的增加，断口形貌转变温度（FATT）普遍升高，这是由于Laves相的析出和M23 C6碳化物的长大所致。12 Cr-1 Mo-V-W-Fe钢中析出相的形态变化虽不如其它钢大，但FATT的初始值却相当高。9 Cr-1 Mo-V-Nb-Fe合金中Laves相（Fe_2 Mo）的析出温度较低，为823-873 K。8 Cr-2 W-V-Ta-Fe钢在873 K、36 Ms时效后，由于其Laves相（Fe_2W）的析出速度慢，FATT仍低于9 ~ 12%Cr钢。
A reduced activation ferritic steel, 8Cr-2W-0.2V-0.04Ta-Fe, was aged at 673–923 K. for up to 36 Ms, and Charpy impact tests and metallurgical investigation were conducted on the aged specimens. The results were compared with those for 12Cr-1Mo-V-W, 9Cr-1Mo-V-Nb, and Ta-free 8Cr-2W-0.2V steels. The fracture appearance transition temperature (FATT hereafter) in most cases increased with increase in aging time and aging temperature due to the precipitation of Laves phase and the growth of M23C6carbides for all the steels tested. Though the change in morphology of the precipitates in 12Cr-1Mo-V-W-Fe was not as large as in the other steels tested, the initial value of the FATT was rather high. The Laves phase (Fe2Mo) precipitation occurred at rather a low temperature, 823–873 K in 9Cr-1Mo-V-Nb-Fe. The FATT of 8Cr-2W-V-Ta-Fe was lower than that of the 9 to 12%Cr steels even after aging at 873 K for 36 Ms because of its slow rate of Laves phase (Fe2W) precipitation.