Solubility product and precipitation of TaC in Fe-8Cr-2W steel
Solubility product and precipitation of TaC in Fe-8Cr-2W steel
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DOI：
10.1016/s0022-3115(98)00151-2
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发表时间：
1998-10
影响因子：
3.1
通讯作者：
M. Tamura;K. Shinozuka;K. Masamura;K. Ishizawa;S. Sugimoto
中科院分区：
文献类型：
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作者：
M. Tamura;K. Shinozuka;K. Masamura;K. Ishizawa;S. Sugimoto
研究了奥氏体中 TaC 的析出行为，以提高 F-82H 型低活化钢（8%Cr-2%W 钢）的机械性能。 F-82H 型奥氏体中 TaC 的溶度积是温度的函数，比 γ-Fe 大 70%。金相检验发现：（1）奥氏体晶粒的形核长大和/或逆α→γ相变加速了细小TaC颗粒的析出，而细小析出物抑制了奥氏体晶粒的进一步长大。 (2) 预先在1523K均质化时，与直接加热热轧板后的晶粒相比，在1223~1323K加热时观察到粗大的奥氏体晶粒，而溶度积本身与均质化处理大致无关。
The precipitation behavior of TaC in austenite was studied to improve mechanical properties of a reduced-activation steel, Type F-82H (an 8%Cr–2%W steel). The solubility product of TaC in austenite of Type F-82H was determined as a function of temperature and was 70% larger than that of γ-Fe. On metallurgical examination, the following was found: (1) The nucleation and growth of austenite grains and/or the reverse α→γ transformation accelerated the precipitation of fine particles of TaC, and the fine precipitates suppressed the further growth of the austenite grains. (2) When homogenizing at 1523 K previously, coarse austenitic grains were observed by heating at 1223–1323 K as compared with the grains after directly heating of the hot-rolled plate, while the solubility product itself was roughly independent of the homogenizing treatment.