From melting to rolling! Mingtai experts reveal the key points of quality control in the whole process of 5052 aluminum plate production
As a key material in the fields of ships, automobiles, rail transit, etc., the quality stability of 5052 aluminum plate directly affects the performance of the end product. As a leading enterprise in the industry, Mingtai Aluminum has built a full-process quality closed loop of “melting-ingot processing-heating-rolling-heat treatment”. The following is an in-depth analysis of the 12 core control points of each link:
I. Melting stage: precise coding of alloy genes
1. Composition design:
●Mg/Mn ratio is strictly controlled in the range of 2.2-2.8% to ensure the balance of strength and ductility
●Add 0.05-0.1%Ti to refine the grains, and add 0.08%Sc to improve corrosion resistance
2. Melting process:
●Three-stage degassing system (rotary blowing + ultrasonic vibration + vacuum refining) makes the hydrogen content ≤0.12ml/100g
●Ceramic filter plate + electromagnetic purification technology to achieve inclusion content <5ppm
3. Casting parameters:
●Water-cooled mold temperature is controlled at 680℃±10℃, and the casting speed is stable at 60-80mm/min
●Low liquid level casting technology is used to improve the uniformity of grain size by 45%
II. Ingot treatment: Deep optimization of microstructure
1. Homogenization treatment:
●Two-stage homogenization process (450℃/6h+580℃/8h) to eliminate component segregation
●Equipped with infrared temperature measurement system to ensure ingot temperature uniformity of ±3℃
2. Milling surface control:
●Adopt five-axis linkage milling machine, and the surface milling amount is controlled at 0.5-1.0mm
●Vacuum dust collection system ensures zero milling chips
III. Heating process: Precise control of energy input
1. Temperature curve:
●Three-stage heating is used (preheating section 400℃/2h+heating section 550℃/4h+soaking section 530℃/1h)
●Equipped with laser thermometer to realize real-time feedback control of ingot temperature
2. Oxidation control:
●Nitrogen protection heating furnace, oxygen content controlled at <5ppm
●Develop anti-oxidation coating to reduce surface oxidation and burning
IV. Rolling stage: ultimate shaping of plate shape performance
1. Hot rolling process:
●The first pass reduction rate is 12-15%, with high-pressure water descaling system
●Intermediate annealing uses a box furnace, annealing temperature 560℃±5℃
2. Cold rolling control:
●Equipped with AGC thickness automatic control system, accuracy of ±0.005mm
●Tension gradient control technology realizes dynamic adjustment in different passes
3. Plate shape control:
●Adopt CVC+roller technology, with plate shape meter closed-loop control
●Develop “step cooling” process to control residual stress
V. Heat treatment: ultimate awakening of material properties
1. Annealing process:
●Use nitrogen to protect annealing furnace to prevent surface oxidation
●Develop a three-level annealing curve to eliminate internal stress while maintaining excellent performance
2. Aging treatment:
● Pre-aging + main aging combined process, improve yield strength 15-20MPa
● Equipped with online hardness tester to ensure performance stability
Mingtai quality commitment
✅ Equipment guarantee: Introducing international top equipment such as German SMS rolling line and American Inductor melting furnace
✅ Inspection system: Equipped with more than 20 types of inspection equipment such as eddy current flaw detector and laser thickness gauge
✅ Service support: Provide full-cycle quality traceability system and 7×24h technical response
Contact Mingtai Aluminum immediately
Get the “5052 Aluminum Plate Production Quality White Paper” or make an appointment with the expert team for production line diagnosis! Let us use the precision control of the whole process to create a zero-defect aluminum solution for you.
