Zhang Yong, Wu Jiefeng, Liu Zhihong, Liu Songlin, Lei Mingzhun, Atif Muhammad, Liu Zhenfei, Shen Xu, Ma Jianguo
Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China.
Science Island Branch, University of Science and Technology of China, Hefei 230026, China.
Materials (Basel). 2021 Jun 19;14(12):3405. doi: 10.3390/ma14123405.
The water-cooled ceramic breeder (WCCB) blanket is a component of the China Fusion Engineering Test Reactor (CFETR). The Reduced Activation Ferrite/Martensite (RAFM) steels are the preferred structural materials for WCCB blanket. As a kind of RAFM steels, China low activation martensitic (CLAM) steel was welded by electron beam welding (EBW), and then quenched-tempered treatment was carried out. The results show that at the welding state, the welding seam was composed of large martensite and δ ferrite and the organization of the heat-affected zone (HAZ) was changed slightly with the different heat input. Moreover, the hardness of welded joints was higher than that of base material (BM), but the impact toughness was very low. After quenched-tempered treatment, the δ ferrite in the weld was eliminated, the residual stress of the test plate decreased as a whole, and the mechanical properties were improved significantly.
水冷陶瓷增殖剂（WCCB）包层是中国聚变工程试验堆（CFETR）的一个部件。低活化铁素体/马氏体（RAFM）钢是WCCB包层的首选结构材料。作为一种RAFM钢，对中国低活化马氏体（CLAM）钢进行了电子束焊接（EBW），然后进行了调质处理。结果表明，在焊接状态下，焊缝由粗大马氏体和δ铁素体组成，热影响区（HAZ）组织随热输入不同略有变化。此外，焊接接头的硬度高于母材（BM），但冲击韧性很低。调质处理后，焊缝中的δ铁素体被消除，试验板的残余应力整体降低，力学性能显著提高。
