The evolution behavior and constitution characteristics of interfacial oxides in the hot-rolled stainless steel clad plate

• Published in: Corrosion science 2023-02, Vol.211, p.110866, Article 110866
• Main Authors: Lin, Zengmeng, Liu, Baoxi, Yu, Wenxing, Zhang, Boyang, Ji, Puguang, Feng, Jianhang, Yin, Fuxing
• Format: Article
• Language: English
• Subjects: Interfacial oxide; Stainless steel clad plate; Tensile shear testing; Vacuum degree; Vacuum hot rolling
• ISSN: 0010-938X; 1879-0496
• DOI: 10.1016/j.corsci.2022.110866

The interface oxides’ morphologies, compositions and structures of 316 L/Q235 stainless steel clad plate with different vacuum degrees of 105, 400,10 and 10−2 Pa were investigated. As the vacuum degree raises, the oxides changes from continuous coarse nodules to refined rod particles, and the constitution changes from Cr2O3, MnCr2O4 and SiO2 into amorphous Mn2SiO4. Interestingly, the shear fracture position transfers from the interface into the decarburized layer as the vacuum degree increases. Overall, the dispersed nanoscale amorphous Mn2SiO4 play an important role in strengthening and toughening interface of hot-rolled stainless steel clad plates. •The hot-rolled stainless steel clad plates with four vacuum degrees were successfully fabricated.•Interfacial oxides display various characteristics under different vacuum degrees.•Oxides change from Cr2O3, MnCr2O4 and SiO2 into Si-Mn amorphous oxide as vacuum degree increases.•The oxides surface covered with amorphous SiO2 will destroy the interface bonding.•The nano-scale amorphous oxide will improve the interface bonding strength.