Lightweight Stainless Steel Clad Aluminum Plate

The stainless steel layer in the lightweight stainless steel clad aluminum plate improves the tensile strength of the composite plate, but its work hardening reduces the elongation and overall plastic deformation capacity of the composite plate. The comprehensive properties and stress state of the stainless steel layer in the stainless steel aluminum composite plate determine the formability of the composite plate. When the stainless steel layer is inside the cup, the stamping performance of the composite plate is better. In the process of tensile and stamping deformation of stainless steel aluminum clad plate, the failure cracks are first generated from the stainless steel layer. Because the residual tensile stress of the stainless steel layer in the rolling direction (0 ° direction) is far greater than that in the spreading direction (90 ° direction), the failure cracks of the stainless steel layer are now perpendicular to the rolling direction.

 

The metal composite plate not only has the corrosion resistance, heat resistance, wear resistance and other properties of the clad material, but also has the strength and stiffness of the base material. The stainless steel composite plate accounts for more than 80% of the metal composite plate. The stainless steel composite plate is a layered composite material with a layer of high corrosion resistance stainless steel on a low carbon or low alloy steel plate through a certain process. Performance characteristics of pure stainless steel plate, stainless steel composite plate, carbon steel+coated steel plate and lining. Stainless steel composite plate has obvious performance and cost advantages. Compared with pure stainless steel plate, stainless steel composite plate can save 70%~80% of alloy elements such as chromium and nickel, thus saving 30%~50% of cost. The use of stainless steel composite plate can greatly save stainless steel materials and significantly reduce the material cost of various equipment, so it has a strong price and market advantage.

 

The drawing properties of lightweight stainless steel clad aluminum plate are related to the thickness ratio of component metals, component metals, and stacking sequence. The overall drawing properties of composite plates are close to those of the component metals with the best drawing properties. Increasing the thickness ratio of materials with higher tensile strength can improve the drawing properties of composite plates. For three-layer composite plates with the same total thickness and thickness ratio, the mechanical property indicators representing the drawing properties of component metals, hardening index n and tensile strength σ The bigger the b is, the better the overall drawing formability of the composite plate is; The material with high tensile strength has better deep drawing formability when one side is in contact with the die than the material with low tensile strength when it is in contact with the die.

 

Fereshteh Saniee et al. pointed out that the composite plate can combine the material properties of the components in the forming process to obtain better forming results. Aghchai et al. deduced the theoretical calculation formula of the forming limit diagram of the double-layer plate, and pointed out that the forming limit of the composite plate increases with the increase of the strain hardening index and the strain rate sensitivity coefficient. Atrian et al. studied the blank holder force The research shows that the relationship between the sheet diameter and the maximum drawing force is linear, and the drawing force increases with the increase of the sheet diameter.

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