Thermoformed part with excellent paint film adhesion and method of manufacturing the same

Abstract

The invention discloses a thermoformed part with excellent paint film adhesion, which comprises a base material layer and an aluminum coating layer plated on at least one surface of the base material layer; the average roughness Ra of the surface of the thermoformed part is 1.0 ~3.0μm, peak height and peak valley height Rt is 8~30μm, roughness peak count Rpc≥50. In addition, the present invention also discloses a method for manufacturing the above-mentioned thermoformed parts with excellent paint film adhesion, which includes the steps: (1) immersing the substrate in an aluminum plating solution to obtain a plate with an aluminum-coated layer on the surface; (2) flattening ;(3) Blanking: blanking or cutting the plate into the blank of the required shape of the part; (4) heat treatment; (5) transmission and hot stamping: quickly transferring the hot blank to the mold for cooling and stamping to form Thermoformed parts.

Description

technical field [0001] The present invention relates to a material and a manufacturing method thereof, in particular to a thermoforming material and a manufacturing method thereof. Background technique [0002] In recent years, the application of thermoforming parts in the automotive industry has become very important, especially in the safety structural parts of automobiles, which have irreplaceable advantages in some parts with high strength and complex shapes. The materials used for hot forming parts are divided into coated and non-coated ones. The main purpose of the coating layer is to prevent the surface of the steel sheet from oxidizing during the hot stamping forming process. The formed parts can be directly painted and welded. At present, materials without a coating layer must be subjected to surface shot peening after hot forming to remove the oxide layer generated on the surface, otherwise the subsequent coating and welding of parts will be affected. The surface ...

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Problems solved by technology

In the technical solution disclosed in this patent document, it includes heating, transfer and cooling, but does not involve the hot stamping process, which will cause unstable quality of stamped products, such as shrinkage, cracking, etc., and the furnace atmosphere during the heating process is not controlled. , leading to changes in the atmosphere in the furnace during the heating process, especially a large change in the oxygen content, resulting in easy changes in the appearance and color of the product. In actual production, it is found that the appearance and color of the stamped products obtained are quite different when the same incoming material is used in the same process.

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