The existing stability theory of layered clad plates can provide research ideas for the stability of titanium-steel clad plates and establish equilibrium differential equations for plates. The steps are: first, make basic assumptions, use multiple bending stiffness coefficients, establish an elastic modulus equation, and then substitute into the balance equation of the plate, express the bending stiffness performance of the material with the elastic modulus, thereby establishing the titanium steel composite plate. It comprehensively considers the influence of compound ratio, residual stress, material properties, bending direction, and interface bonding, and expresses its influence on critical load in the balance equations such as basic assumptions, flexural stiffness, and elastic modulus. When the composite ratio is low, the web is considered a thin plate. When the composite ratio is high, the equilibrium equation is used to deduce the flexural stiffness and shear stiffness of the base layer and the cladding layer respectively.
The compression stability of titanium-steel clad plates should be paid attention to. With the development of the deformation of the interface layer of the plate, the order in which the base layer and the surface layer enter the plastic state is different, and the significant plastic difference will affect the elastoplastic development and stability of the plate. If the titanium steel layer protrudes during the instability, due to its significant strain-strengthening performance and ductility, it will lead to the redistribution of the plate stress, which is conducive to the stable development of the elastoplasticity of the plate; on the contrary, if the low carbon steel side protrudes, The local separation instability state will occur due to the low strength of the interface layer.
The deformation coordination of the titanium-steel clad plate is related to the temperature during rolling and the thickness of the interface layer. The brittle crystals at the interface will affect the bonding strength of the titanium-steel clad plate. The higher the rolling temperature, the more obvious the brittleness. Therefore, relatively speaking, low temperature is more friendly to rolling, but it is difficult to ensure its deformation coordination.
At present, most of the simulations use the inseparability of the two metals at the joint surface. In practice, the combination of the two metals occurs gradually with pressing. Aiming at the problems existing in titanium-steel clad plates, a more optimized rolling process can be developed by combining the advantages of both the explosion method and the rolling method, with higher bonding strength and better comprehensive performance, and an external energy field can also be introduced into the titanium steel. In the field of clad plate rolling, reduce its deformation resistance, improve plastic deformation ability, reduce the rolling temperature of titanium steel clad plate, and reduce the generation of compounds.
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