Effect of TaC Particles Dissolution on Grain Coarsening in Reduced Activation Steels

钢铁研究学报(英文版), 2011, 18(9): 47-52.

Effect of TaC Particles Dissolution on Grain Coarsening in Reduced Activation Steels

^1, , ^2, , ^3, , ^4, , ^5, , ^6,

1.Key Laboratory of Advanced Materials of Ministry of Education, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China

2.Key Laboratory of Advanced Materials of Ministry of Education, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China

3.Key Laboratory of Advanced Materials of Ministry of Education, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China

4.Key Laboratory of Advanced Materials of Ministry of Education, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China

5.Key Laboratory of Advanced Materials of Ministry of Education, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China

6.Key Laboratory of Advanced Materials of Ministry of Education, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China

基金项目: National Natural Science Foundation of China(51071090) National Basic Research Program of China(2010CB731600;2009GB109000)

关键词： TAC , 颗粒 , 激活 , 奥氏体化温度 , 奥氏体晶粒长大 , 溶出 , 籽粒 , 钢

Effect of TaC Particles Dissolution on Grain Coarsening in Reduced Activation Steels

Keywords： reduced activation steel , TaC precipitation , diffusion , thermodynamic model ,

The effect of TaC on grains and packets coarsening in the reduced activation ferritic/martensitic （RAFM） steels was investigated. It was found that the combined effect of the austenitizing temperature and heating rate resulted in the heterogeneous austenite grain growth. When the austenitizing temperature was raised above 1 423 K, the TaC particles disappeared, and the homogenous grains abruptly increased. The thermodynamic model for dissolution of TaC particles during austenitizing was applied to interpret the results.

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