影响钢材辐照脆化的材质因素

Material Quality Factors Affecting Irradiation Embrittlement of Steel

钢材经中子辐照后会产生不同程度的脆化倾向。影响钢材辐照脆化的因素有中子注量、辐照温度、应力状态、材料成份、以及综合脆化效应。本文讨论了材料的冶金结构、化学成份、以及钢材的型式等材质因素对钢材的中子辐照脆化的影响，提出了采用控制材质因素来改善材料辐照脆化倾向的方向。这对反应堆主要部件材料，特别是位于高辐照区的部件材料的选择，以及在制订这些部件的材料标准时有指导意义。

After irradiation, the steel will heve different tendency of embrittlement. The factors affecting the irradiation embrittlemet of steel are neutron fluence, irradiation temperature, stateof stress, material composition and synthetic effects of embrittlement. This paper details thematerial quality factors such as the material'S metallurgical structure, chemical compositionand forms steel etc. and proPOses the direction to control the material quality factors to betterthe irradiation embrittlement. It is directive for choosing the material of the main parts of nuclear power reactor especially the parts located in the high irradiation areas and specifying thematerial standards of these parts.