基于高通量热力学计算的SA508-3钢材料优化

Optimization of SA508-3 Steel Materials Based on High Flux Thermodynamic Calculations

核电压力容器作为核电站的重要部件,服役时面临高温、高压、腐蚀介质以及中子辐照等恶劣条件,需要很高的综合性能。为了提高其服役安全性及使用寿命,需要对核电压力容器材料进行优化。传统"试错法"研发周期长,研发投入大,难以符合迫切的研发要求。此次研究引入高通量计算方法,利用CALPHAD方法通过热力学计算研究SA508-3钢成分的优化。在研究过程中,利用Thermo-Calc软件计算相图,采用JMatPro进行冷却转变曲线的计算。结果表明,此方法实现了SA508-3钢的材料优化,可用于热力学角度材料优化。

As an important component of nuclear power plant, the pressure vessel in nuclear power plant is faced with severe conditions such as high temperature, high pressure, corrosive medium and neutron irradiation, which need higher overal performance. In order to improve its service safety and service life, it is necessary to optimize the pressure vessel materials.The traditional "trial and error method" has a long R & D cycle and large R&D investment, so it is difficult to meet the urgent R&D requirements.High-flux calculation method was introduced and CALPHAD method was used to study the optimization of composition of SA508-3 steel through thermodynamic calculation. During the study, thermo-Calc software was used to calculate the phase diagram, and JMatPro was used to calculate the cooling transition curve. The results show that the material optimization of SA508-3 steel is realized by the method, which can be applied to material optimization according to the thermodynamics.