论文部分内容阅读
用于核反应堆压力壳厚壁锻件的低合金钢所必须考虑的主要性能是与使用有关的可焊性以及与运行性能有关的如突然断裂的性能、疲劳性能及辐照下的脆化性能等。钢材的选择不是固定不变的,至少有两个原因,推动钢材品种的改进;一是反应堆功率的增大,必须增大压力壳壁厚及直径。在某些情况下,为了更适应新的壁厚,有必要采用新的钢材。二是由于安全要求的不断提高,章程、规范、技术条件也在不断发展,这些经常推
The main properties that have to be considered for low-alloy steels used in thick-walled forgings for pressure vessels in nuclear reactors are weldability related to serviceability and properties such as sudden breakage, fatigue properties, and embrittlement under irradiation. The choice of steel is not fixed, at least two reasons to promote the improvement of steel varieties; First, the reactor power increases, you must increase the pressure shell wall thickness and diameter. In some cases, in order to adapt to the new wall thickness, it is necessary to adopt new steel. The second is due to the continuous improvement of safety requirements, regulations, norms, technical conditions are also constantly evolving, these often push