中国实验快堆栅板联箱焊接件与钠的相容性

Compatibility Between China Experimental Fast Reactor Welded 304S.S. Specimens With Sodium

在模拟中国实验快堆运行工况条件下,对用不同来源304不锈钢制造的栅板联箱焊接件进行试验研究,分析和测试在450℃钠中浸泡3 000 h后焊接件的晶间腐蚀状况及其力学性能变化。试验结果表明:在本试验条件下,焊接件试样的平均腐蚀速率均小于0.9 mg/(m2.h);焊接件的焊接区及热影响区表面均未出现晶间腐蚀;试验前后,试样的屈服强度、抗拉强度及延伸率均无明显变化。

The investigation on the compatibility between China Experimental Fast Reactor（CEFR） welded specimens with sodium was performed under simulative operation conditions of CEFR. The intergranular corrosion and the variation in mechanical porperties were observed and determined after test in 450 ℃ sodium for 3 000 h. The average corrosion rate is less than 0.9 mg/（m^2 · h） and the intergranular corrosion is not observed at the welded specimen surface contacted with sodium. Comparing tensile behaviors of as-received specimens with that of corroded specimens, the difference on the yield strength（R0. 2%） and ultimate tensile strength（UTS） as well as elongation precent （A%） are not considerable before and after of experiment.