Why Do You Need An Aluminum Stir Welding Sheet
In the field of shipbuilding, the innovation of materials and processes has always been the core driving force for the progress of the industry. With the increasingly urgent demand for lightweight, high performance and sustainability in the global shipping industry, aluminum friction stir welding sheets are becoming the "new favorite" of shipbuilding with their unique technical advantages. This combination of materials and processes not only solves the pain points of traditional welding, but also fundamentally changes the pattern of shipbuilding.
Before the emergence of FSW technology, the welding of aluminum alloys in shipbuilding mainly relied on arc welding technology. However, the high-temperature fusion process of arc welding can cause serious thermal deformation and material weakening problems, and the weld strength is often only about 60% of the parent material. In addition, the pores, spatter and residual stress generated by arc welding not only increase maintenance costs, but also limit the application of large aluminum alloy structural parts.
For example, the tensile strength of the conventionally welded marine 6082-T6 aluminum alloy joint is usually less than 180MPa, while FSW technology can increase it to more than 260MPa, and the strength coefficient exceeds 0.8.
As a solid-state welding technology, FSW softens the material and achieves solid-phase connection by generating heat through friction between the rotating stirring head and the base material. This process avoids metal melting, and the heat-affected zone is only 1/3 of arc welding. The weld structure is dense like forging, and the mechanical properties are close to the base material. The aluminum stir welding sheet produced by Haomei Aluminum ot only has extremely high dimensional accuracy, but also does not require welding wire, which completely solves the defects of traditional welding.
The low density of aluminum alloy (about 1/3 of steel) is an ideal material for lightweight ships, and FSW technology further amplifies this advantage. Large wide ribbed sidings welded by FSW can reduce the weight of the hull by 15-20%, significantly improving fuel efficiency and speed. For example, a high-speed ferry using FSW aluminum plates can increase the speed by more than 10% under the same power, while increasing the cargo capacity by 15%.
This lightweighting is not only reflected in the hull structure, but also extends to various parts of the ship. Taking the aircraft carrier as an example, the USS Independence uses 1,019 tons of aluminum alloy, among which the decks, bulkheads and other structural parts welded by FSW greatly reduce the weight of the superstructure and improve the navigation stability and seaworthiness.
The introduction of FSW technology has completely changed the production process of shipbuilding. Traditional riveting or arc welding requires a lot of manual operation, while FSW can achieve fully automated welding, increasing production efficiency by 3-5 times.
In modular ship construction, the advantages of FSW are more prominent. The large wall panels prefabricated by Haomei Aluminum through FSW can be directly hoisted to the hull for rapid assembly, reducing more than 70% of the on-site welding workload. This "factory prefabrication + on-site assembly" model shortens the shipbuilding cycle by 20-30% and reduces the safety risks of on-site construction. Welcome to inquire aluminium profile sheet price from us directly.
Original Source:https://www.marinealu.com/a/why-do-you-need-an-aluminum-stir-welding-sheet.html
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