How to Strengthen 5xxx Marine Aluminium Sheet Performance
In terms of product performance, the marine grade aluminum sheet has stricter process requirements and performance standards than other ordinary aluminum plates like good corrosion resistance, good welding crack resistance. The main marine aluminum sheets include 5052 aluminum sheet, 5083, 5083,etc. For reaching ideal performance, there are several methods.
Solid solution strengthening
Alloy elements are added to pure aluminum to form infinite solid solution or finite solid solution, which not only can obtain high strength, but also can obtain excellent plasticity and good pressure processing performance. The most commonly used alloying elements for solid solution strengthening in general aluminum alloys are copper, magnesium, manganese, zinc, silicon, nickel and other elements.
Time strengthening
After the heat treatment of the aluminum alloy, a supersaturated aluminum Q345B I-steel solution can be obtained. When this supersaturated aluminum-based solid solution is at room temperature or heated to a certain temperature, its strength and hardness increase with time and extension, but its plasticity decreases. This process is called aging.
Reinforcement of excess phase
When the water content of the alloying element added to aluminum exceeds its limit solubility, a part of the second phase that cannot be dissolved into the solid solution appears during quenching and heating, which is called the excess phase. The excess phases in aluminum alloys are mostly hard and brittle intermetallic compounds. They play a role in improving strength and hardness, but reducing plasticity and toughness.
Refine the organization and strengthen
Adding trace elements to the aluminum alloy to refine the structure is another important means to improve the mechanical properties of aluminum alloy. Traces of titanium, zirconium, beryllium, strontium and rare earth elements are added to the wrought aluminum alloy. They can form refractory compounds, which can refine the grains and improve the strength and plasticity of the alloy.
Cold deformation strengthening
It refers to the en aw 5083 aluminum sheet is cold deformed below the recrystallization temperature. The same alloy is cold deformed at the same temperature, the greater the degree of deformation, the higher the strength. Plasticity decreases as the degree of deformation increases.
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