Additionally, uneven stretching of the plate in the transverse direction during rolling can lead to distortion and affect flatness if there is uneven temperature distribution in the transverse direction during subsequent processes.Quick QuoteEdge wavesEdge waviness in aluminum plates refers to the overall unevenness or waviness along the plate's edges. The plate's edges repeatedly exhibit waves, affecting usability.During rolling, the edges stretch more than the central part.
Addressing these issues through adjustments such as enhancing cooling, adjusting the initial roller crown, and increasing roller deflection can effectively mitigate edge waves.
During the rolling process, the central part stretches more than the edges.
Addressing these issues through modifications to roller crown, enhancing cooling, and reducing roller deflection can effectively alter the central waves.
reveals unsatisfactory mechanical properties and waste resulting from exceeding standard mechanical properties at room temperature. The ingot's chemical composition does not meet technical standards, and the heat treatment process was not correctly executed. There are issues with the heat treatment equipment, the laboratory's heat treatment process, or testing methods, and sample specifications and surface quality do not meet requirements.
Overheating
When the casting block or aluminum plate reaches a temperature during heat treatment that equals or exceeds the eutectic temperature of the low-melting-point constituents, it can cause localized grain coarsening, the formation of liquid phase globules within the grains, and the appearance of triangular shapes at grain boundaries.
This phenomenon disrupts the grain-to-grain bonding, leading to a decrease in overall performance, and such materials are considered absolute scrap or waste.
Uneven temperatures in different zones of the furnace, malfunction of heat treatment equipment or instruments, unreasonable heating or heat treatment procedures, or inadequate execution, and improper loading placement are also factors that can contribute to this issue.Casting inclusions are another potential cause. These are block-shaped metal or non-metallic substances in the center of the aluminum plate, spanning its entire thickness, and disrupting the overall structure of the plate. This can be described as "During casting, the inclusion of metal or non-metallic substances resulted in this structural defect after rolling.
For critical large orders, request samples from the aluminum plate supplier in advance for testing purposes. Dingang provides complimentary samples.
Please define quality standards and problem-solving solutions in the contract to minimize quality risks. You may also inspect the goods at the factory after production. The factory is available for inspection at your convenience.
If issues are discovered upon receipt, please check the quality certificate and contract terms to determine if you can hold the aluminum plate supplier responsible. You may also request that the supplier take responsibility for quality issues, providing cost compensation or reductions.Inspect the defective areas and assess whether salvage and repair are possible through methods like cutting or patching.If the defect area is extensive and cannot be repaired, consider annealing and re-rolling.Explore different processing methods to determine if crucial parts can be manufactured while avoiding the defective areas.If reuse is not feasible, consider selling the material as scrap at scrap metal prices.
Maintain comprehensive records of all quality issues to inform future selection of an aluminum plate supplier.
