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奥氏体不锈钢ＳＵＳ３１６ Ｔｉ 的手工焊焊接接头（ 焊条Ａ１０２） 承受８０ ％ 的屈服拉应力，在氧浓度为１－０ ×１０ － ４ ，温度为５５０ ℃的液态钠中腐蚀１５００ｈ ，对试样进行ＳＥＭ 和Ａｕｇｅｒ 俄歇能谱分析以及Ａｒ＋ 的溅射．结果表明，焊缝中由于存在δ铁素体，加速了Ｃｒ，Ｎｉ 的扩散，使其抗钠腐蚀性能下降．而焊接接头的热影响区母材的腐蚀机理都为晶间腐蚀，所以无明显差异．因此在制造快堆时，必须考虑到焊缝中的δ铁素体含量，以保证快中子增殖堆的安全运行．
The austenitic stainless steel SUS316 Ti hand-welded welded joint (electrode A102) was subjected to a yield stress of 80%, corroded in liquid sodium at an oxygen concentration of 1-0 × 10 - 4 and a temperature of 550 ° C for 1500 hours, SEM and Auger Auger spectroscopy and sputtering of Ar +. The results show that due to the presence of δ ferrite, the accelerated diffusion of Cr and Ni decreases the resistance to sodium corrosion. However, the corrosion mechanism of base metal in heat-affected zone of welded joints is intergranular corrosion, so there is no obvious difference. Therefore, in the manufacture of fast reactors, the δ ferrite content in the weld must be taken into account to ensure the safe operation of the fast neutron breeder reactor.