热输入对316L焊接接头在液态LBE中的空泡腐蚀影响

Cavitation erosion behavior of 316L steel welded joints at different heat input in liquid lead-bismuth alloy

摘要: 研究不同热输入下316L 焊接接头和母材在550 ℃液态铅铋合金中的空泡腐蚀行为。试验结束后，使用扫描电子显微镜(SEM)和原子力显微镜(AFM)对空蚀80 h 后的试样进行表面形貌和粗糙度分析。研究表明，316L不锈钢焊缝在液态Pb-Bi 中的抗空蚀能力取决于奥氏体晶粒的大小，焊接热输入增大，奥氏体晶粒长大，焊缝的抗空蚀能力变差。在空蚀时间相同的情况下，316L 母材的抗空蚀能力优于焊缝。
- 空泡腐蚀316L /
- 不锈钢 /
- 焊接接头 /
- 铅铋合金
Abstract: In this paper, the cavitation erosion behavior of 316L welded joints at different heat input in the liquid lead bismuth alloy was studied. After the cavitation corrosion test for 80 hours, the surface morphology and roughness of the samples were analyzed by electron scanning electron microscopy (SEM) and atomic force microscopy (AFM). Research showed the cavitation erosion resistance of 316L welded joints in liquid Pb-Bi depends on the austenite grain size. As welding heat input increases, the austenite grain size becomes larger, which leads to the poor corrosion resistance. The cavitation erosion resistance of 316L base metal is better than that of welded joints at the same cavitation erosion time.
- cavitation erosion /
- 316L stainless steel /
- welded joint /
- lead-bismuth alloy

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