Compatibility of Austenitic Steel With Molten Lead-Bismuth-Tin Alloy

摘要

The compatibility of the austenitic AISI 304 steel with Pb-Bi-Sn alloy was analyzed.The AISI 304 steels were immersed in stagnant molten Pb-33.3Bi-33.3Sn alloy at 400,500 and 600 ℃ for different exposure times(100-2000 h)respectively.X-Ray diffraction spectrum(XRD)with a Y-4Q system(CuKα,λ=0.15478 nm)was used to identify the phases on the surface of specimens after exposing to Pb-Bi-Sn liquid metal(LM).The surface and cross section of the specimens were analyzed by means of scanning electron microscopy(SEM)and energy dispersive X-ray analysis(EDX).The result showed that a FeSn alloy layer on the surface of all specimens was formed,and it prevented AISI 304 steel matrix from penetration attack and loss of alloy elements at 400 and 500 ℃.