首页|Effect of heating temperature on microstructure and properties of Ti/steel clad plates with corrugated interfaces
Effect of heating temperature on microstructure and properties of Ti/steel clad plates with corrugated interfaces
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To solve the problems of severe interface oxidation at high temperature,low interface bonding strength at low temperature,and severe plate shape warping in the traditional flat rolling process for preparing Ti/steel clad plates,a new corrugated-flat rolling(CFR)process is adopted to prepare Ti/steel clad plates with corrugated interface.The study investiagtes the effects of different heating temperatures on the interface morphology,mechanical properties and corrosion resistance.Ti/steel clad plates prepared by CFR process have a distinct corrugated three-dimensional interface.The diffusion range of interface elements and the thickness of solid solution diffusion layer change with different heating temperatures.The tensile-shear strength of the clad plate increases first and then decreases with the increase in heating temperature,peaking at 327 MPa at 900 ℃.The tensile strength is less affected by heating temperature,and the maximum tensile strength is achieved at a heating temperature of 800 ℃,with a value of 766 MPa.During the fracture process of the clad plates,the steel exhibits plastic fracture characteristics,while Ti exhibits a mixture of plastic and brittle fracture characteristics.The overall corrosion resistance of Ti surface in the clad plate is good.As the heating temperature increases,the polarization resistance of Ti surface decreases,the current density in the passivation zone increases,and the active sites and energy required for the formation of the passivation film decrease.
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