Magnesium alloy plate is widely recognized as one of the most promising lightweight structural materials in modern industry, featuring low density, high specific strength, excellent damping capacity, good electromagnetic shielding performance, and environmental degradability. It has become a core material in digital equipment, transportation, printing, aerospace, energy exploration, and other high-end sectors. The production of qualified magnesium alloy plate relies on a standardized, precise, and controllable manufacturing process.

1. Raw Material Preparation and Composition Design

The production starts with strict raw material selection and component ratio optimization. High-purity magnesium ingots are used as the base material, and alloying elements such as aluminum, zinc, manganese, and rare earth are added according to different application scenarios to form series of magnesium alloys like AZ31B, AZ91D, and AM60B. Before smelting, raw materials need surface cleaning, degreasing, and impurity removal to avoid oxide inclusions and harmful impurities entering the melt, which affect the mechanical properties and corrosion resistance of the final plate. Meanwhile, the proportion of recycled qualified magnesium alloy scraps is reasonably controlled to realize green production and cost reduction under the premise of ensuring product performance.

2. Melting, Refining, and Melt Purification

Smelting is the core link to determine the internal quality of magnesium alloy. The magnesium ingot and alloy elements are heated and melted in a special melting furnace under the protection of mixed gas to prevent oxidation and combustion. During the melting process, refining agent is added for degassing and deslagging, and processes such as standing, filtration, and purification are carried out to reduce the hydrogen content and non-metallic inclusions in the melt to an extremely low level. The purified melt maintains stable temperature and chemical composition, laying a solid foundation for the preparation of high-quality ingots.

3. Semi-continuous Casting and Ingot Processing

The qualified melt is transferred to a casting system for semi-continuous casting to produce large-size magnesium alloy ingots. The casting speed, cooling intensity, and mold temperature are precisely controlled to obtain uniform microstructure, compact structure, and defect-free ingots. The obtained ingots are subjected to sawing, milling, and other processing to remove surface defects, oxide layers, and uneven parts, so that the surface is smooth and the size is accurate, which is convenient for subsequent rolling processing.

4. Homogenization Heat Treatment

The milled ingots are sent to a homogenization annealing furnace for high-temperature and long-term heat treatment. This process can eliminate the internal stress and component segregation formed during casting, improve the uniformity of microstructure, enhance the plasticity of the material, and significantly improve the processing performance in the subsequent rolling process. After homogenization treatment, the ingots have better deformation adaptability and are not easy to crack during rolling.

5. Hot Rolling and Warm Rolling Forming

Heated ingots are initially rolled by a hot rolling mill to break the coarse casting structure and transform it into a compact deformed structure, preliminarily reducing the thickness and improving the performance. Then, multi-pass warm rolling is carried out in a suitable temperature range to further thin the plate, control the grain size accurately, and ensure the plate has good mechanical properties and surface quality. The whole rolling process strictly controls the temperature, reduction rate, and rolling speed to avoid defects such as edge cracking and warping.

6. Cold Rolling, Precision Finishing, and Dimensional Control

For plates requiring high precision and excellent surface quality, cold rolling processing is carried out at room temperature. Cold rolling can effectively improve the dimensional accuracy, flatness, and surface finish of the plate, and control the thickness tolerance within a very narrow range. After cold rolling, the plates are subjected to processes such as straightening, shearing, and slitting to obtain products with specified dimensions and specifications, meeting the customized needs of different customers.

7. Heat Treatment and Performance Regulation

According to the application requirements, the rolled plates are subjected to finished annealing, stress relief annealing, or other heat treatment processes to adjust the hardness, strength, plasticity, and toughness matching. Reasonable heat treatment system can eliminate the processing stress caused by rolling, stabilize the microstructure and performance, ensure the stability and consistency of the product in use, and extend the service life.

8. Surface Treatment, Quality Inspection, and Warehousing

The surface of the heat-treated plate is cleaned, passivated, or coated to improve its corrosion resistance and appearance quality. Each batch of products must undergo a full set of quality inspections, including chemical composition analysis, mechanical property testing, dimensional accuracy detection, surface defect detection, and ultrasonic non-destructive testing. Only the plates that pass all inspections can be packaged, labeled, and put into storage, ready for delivery to the market.

The manufacturing process of magnesium alloy plate is a complex system engineering integrating material science, thermal processing, plastic processing, and automatic control. Each link from raw materials to finished products needs strict process control and quality management to produce high-performance, high-stability, and high-reliability magnesium alloy plate products. As a professional enterprise focusing on the research and development, production, and application of magnesium alloy materials, MEIYINTECH has mastered the core manufacturing technology of magnesium alloy plate, with an annual output of 5,000 tons of magnesium alloy and 1,000 tons of etched plates. The company has strong scientific research strength and a complete quality control system, and its products are sold well in many countries and regions around the world. MEIYINTECH is committed to providing customers with high-quality magnesium alloy plate products and professional solutions, and promoting the wider application and high-quality development of magnesium alloy materials in the global industrial field.