When the aluminum plate is heated, it is easy to form a hard and brittle intermetallic compound on the surface, and the yield strength of aluminum and steel is very different, so the general hot-rolled cladding method cannot be used to manufacture platinum clad steel plates. Therefore, the effect of rolling a clad aluminum-clad steel sheet at a lower temperature, that is, a warm rolling method, was investigated. When rolling the aluminum-clad steel plate, the aluminum cladding plate is heated inside the guard, and then placed on the base plate of the normal temperature steel plate pre-placed on the roller table on the entrance side of the rolling mill, and then rolled and clad. When rolling an aluminum-clad stainless steel plate, the wood rust steel plate is heated and then rolled and clad with an aluminum plate.
The warm rolling method can produce wide-sized aluminum-clad steel sheets on existing rolling mills. Since the aluminum plate is subjected to large deformation and the steel plate is subjected to a small amount of deformation, the obtained composite steel plate can maintain good ductility, so the annealing heat treatment can be omitted. The rolling conditions of the aluminum-clad steel sheet are such that a sufficiently high bonding strength can be obtained at the rolling temperature and the reduced amount of the aluminum sheet. During the warm rolling process of the aluminum plate, the surface oxide film is broken, the new metal surface is exposed, and the metal bond is formed by the mutual diffusion of atoms. This metal bonding process is enhanced by the high pressure during rolling and the high temperature of heating before rolling, as well as plastic deformation heat and friction heat.
The shear strength and tensile strength of the aluminum-clad steel sheet produced by the warm rolling method are above 65MPa and 79MPa, respectively. During the tensile test, the tensile specimen breaks from the center of the aluminum cladding, and a uniform necking occurs at the breaking point. This shows that the composite strength is very high. After the bending test was carried out with a bending radius equal to the thickness of the composite plate, the sample itself did not crack or peel. After submerged arc welding or manual welding, the sample still has good shear strength. It can be seen that the aluminum-clad steel sheet produced by the warm rolling method has sufficiently high practical strength and durability. This kind of aluminum-clad steel plate has been used to make the fixed plate of automobiles. It is expected to be widely used as a structural material.
Baoji Taicheng Clad Metal Materials Co., Ltd is a professional metal clad plate manufacturer, we can provide you with customized aluminum clad steel plates with reliable product quality, rest assured! Welcome your inquiry.
