With the concept of energy conservation and environmental protection deeply rooted in the people, the application of lightweight technology in the automobile industry has been pushed into the new agenda of energy conservation and environmental protection. With the improvement of automobile quality, customers have higher and higher requirements on the manufacturing process of automobile body aluminum plate. The application of aluminum alloy sheet for automobile cover parts is a simple and effective way of lightweight. Automotive aluminum plate is a member of the high-end aluminum family. Due to its strict requirements on performance (forming, connecting, etc.) and surface quality, it also puts forward more detailed control and management requirements for the processing of raw materials. Now, kk Aluminum will introduce the production process and performance requirements of automobile body aluminum plate in detail.
Production process of automobile aluminum sheet. The liquid aluminum is continuously cast into different specifications of aluminum billet, after surface treatment, heating, hot rolling, coiling, cold rolling molding, to get the required thickness, and then continuous annealing heat treatment to get the required micro fine structure and properties.
There are many key technologies and difficulties in the production of automotive aluminum plate materials, which will also have an important impact on the subsequent performance (stamping, coating, etc.).
From the perspective of microstructure, the production process of automotive aluminum plate can be simply summed up into two aspects: cleanliness (chemical metallurgical process) and uniformity (physical metallurgical process). Reflected in the actual mass production process is the control process of melting (casting) and rolling (heat treatment). Excellent aluminum cleanliness and texture uniformity will play a positive role in the subsequent stamping and connecting properties of automobile production plants. The uniformity of the texture includes not only the grain size of the matrix, but also the proportion of the microtexture that is conducive to formability. The macroscopic external performance of material performance is based on its microscopic intrinsic nature. The desired macroscopic properties can be obtained by reasonable control of microstructure and texture.
In view of the production time mismatch between the raw material aluminum plant and the automobile plant, the natural aging of automobile aluminum plate will occur during the interphase process, which will affect the subsequent molding. In order to solve this problem, material engineers at home and abroad have conducted in-depth and systematic research on the theoretical mechanism of the process, and put forward the pre-aging/pre-strain treatment technology. Through the process of pre-aging after solid solution treatment in the raw material factory, the natural aging problem in the transportation and storage process can be slowed down, so as to have better formability in the stamping process.
The reasonable treatment of aluminum plate surface is beneficial to the subsequent coating treatment. The surface treatment is mainly for cold rolled state, which is divided into smooth surface (MF), electronic spark passivation (EDT) and electron beam passivation (EBT).
Through introducing the kk aluminium, believe that all the production process of automotive body aluminum plate and an insight into the performance requirements, for one of the key technologies and difficulties have a more profound understanding, hope our reading will be helpful to you, if you have any demands for various series of aluminum sheet, please and contact us, we sincerely expect your visit.
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