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| Marine grade aluminum t bar |
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Posted by: aluhm - 02-05-2018, 06:08 AM - Forum: Knowledge & Technique
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Marine aluminum alloy profiles are generally used on three types of structures:
First, the main force structure with the strength as the main factor, mainly includes the hull structure and superstructure.
Different types of ships with different ship structure, ship structure generally include bottom plate, bottom plate, side plates, sheer strake, bulwark, deck, bulkhead, coaming, ribs, elbow plate, longitudinal beams, ribs, keel, reinforcement, pillar and pole.
marine grade aluminum t bar
The upper atmosphere structure forecastle, bridge and poop. The upper body as the cabin and placement of some ship equipment with the cab, studio, the crew and passengers of the living room and life. The upper structure includes frame, beam, door board, ceiling, partitions, fences and other special angle aluminum profile.
Seond,, that is, not force construction or force less components. For example, all kinds of fittings (anchor, mast, chimney, ladder, line and circuit device), oil tank, water tank, watertight doors, windows, cover, sanitary equipment, piping, ventilation, windshield, bracket, streamlined shell, handle, handrail, cylinder, piston, base, sling device and furniture etc. etc..
Third. The thrid structures refer to decorative and insulated components. The aluminum can color anodized, and the color anodized aluminum is used as an ornament, which is beautiful, economic
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| What are the alloy models of aluminum elbows |
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Posted by: aluhm - 02-05-2018, 06:05 AM - Forum: aluminium faq
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Aluminum elbows alloy model can be divided into 1060 aluminium elbow, 6061 aluminium elbow, 6063 aluminium elbow, 6082 aluminium elbow, 5083 aluminium elbow, etc. below, we take 6061 aluminium elbow as an example to explain its process and chemical composition:
aluminum elbows
The 6061 is the high quality aluminum elbows aluminum alloy heat treatment production pre stretching process, although its strength and not 2 series or other series compared to, but the characteristics of magnesium and silicon alloy, has excellent processing properties, excellent welding characteristics and electroplating, good corrosion resistance, high toughness, deformation and processing after the material is dense and defect free and easy polishing, color film is easy, excellent oxidation effect and excellent characteristics.
aluminium elbow
The main alloy elements of 6061 aluminum elbows are magnesium and silicon, and form Mg2Si phase. If a certain amount of manganese and chromium, can neutralize the bad effect of iron; sometimes add a small amount of copper or zinc, to improve the strength of the alloy, and the corrosion resistance decreased significantly; there is a small amount of copper conductive materials, titanium and iron to offset the adverse effects on the conductivity of the zirconium; or titanium recrystallization grain refinement and control; in order to improve the cutting performance, adding lead and bismuth. In Mg2Si solution, the alloy has artificial aging hardening function. The main alloy elements in 6061 aluminum alloy are magnesium and silicon, which have moderate strength, good corrosion resistance and weldability, and the oxidation effect is better.
6061 aluminium elbow
The main chemical components of the chemical constituents are: copper Cu: 0.15 - 0.4
Manganese Mn: 0.15
Magnesium Mg: 0.8 ~ 1.2 Shanghai Ling Hong 6061 aluminum plate (5 pieces)
Zinc Zn: 0.25
Chromium Cr: 0.04 ~ 0.35
Titanium Ti: 0.15
Silicon Si: 0.4 ~ 0.8
Iron Fe: 0.7
Aluminum Al: margin
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| Aluminium sheet with ribs for high speed ship |
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Posted by: aluhm - 02-05-2018, 06:01 AM - Forum: Knowledge & Technique
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The modern high-speed aluminum alloy ship is not fundamentally different from the steel ship in the overall performance design. But in material selection and structure design, it is more complicated than steel ship. In recent years, high speed aluminum alloy ships have developed rapidly in the world, and new structural forms of aluminum alloy materials appear successively. In the structural design, the two factors are considered: the load and corrosion environment of the hull joint.
The biggest difference between the aluminum alloy hull structure and the steel hull structure is the stiffened plate, the plate with a single direction is produced, which is marine grade aluminium sheet with ribs.
6082 T6 marine grade aluminum sheet with ribs
Benefit of aluminium sheet with ribs:
Compared with the traditional plate frame welded by MIG and TIG, the aluminium sheet with ribs has obvious technical and economic benefits. With the structure of aluminium sheet with ribs, the surface smoothness and flatness are much higher than the traditional plate frame, the aesthetic effect of ship surface is increased. The application of aluminium sheet with ribs can significantly reduce the consumption of welding materials, and the consumption of conductive nozzles and gas nozzles will produce certain economic benefits.
Application range of marine grade aluminium sheet with ribs:
1. deck structure
The deck of each superstructure (flat and arched) and the main deck structure.
2.The outer wall of an interior wall.
The direction of profile with Aluminium sheet with ribs:
In order to give full play to the inherent performance of the Aluminium sheet with ribs structure, the arrangement of the structural system should be changed into the customary practice in the traditional plate frame. When the Aluminium sheet with ribs is used, the direction of the profile is suitable for the longitudinal direction of the ship, and the stability and the fixation and support of the door and window can be remarkably improved.
6082 T6 aluminum sheet with ribs for ships
The problem of vertical and horizontal frame:
It is necessary to make full consideration of the space between the profiles of the aluminium sheet with ribs ,and the plate frame composed of the aluminium sheet with ribs profile and the transverse frame.
Application of transition section:
The structure with double curvature in the ship structure still uses the traditional plate frame structure, so there is bound to exist between the traditional plate frame and the marine grade aluminium sheet with ribs structure. The structure of this region is a transitional structure.
Bending process of aluminium sheet with ribs for shps:
(1) the bending section perpendicular to the inside, such as with rib sections arranged along the longitudinal direction of aluminium plate with ribs for ships along the beam bending is no problem, as long as the beam web and a profile corresponding gap, after the installation, the natural formation of beam arch.
(2) for the structure with large radius of curvature in the direction of the profile, the bending structure can be obtained through the processing of the profile. However, any hyperbolic structure can not be used with aluminium sheet with ribs for ships.
Mechanical behavior of aluminium sheet with ribs:
Friction stir welding is widely used in the manufacture of wide aluminium plate with ribs. It is of great adaptability and low cost. It is the development direction in the future.
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| How to choose the right 5083 marine grade aluminum plate |
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Posted by: haomeialu - 02-05-2018, 05:55 AM - Forum: aluminium faq
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5083 marine grade aluminum plate is a higher value-added aluminum products, in recent years has become the strategic direction of many large aluminum manufacturers, 5083 marine grade aluminum sheet on the market more and more, the quality is uneven, As the marine aluminum performance requirements are relatively high, which also gives customers the option to purchase 5083 marine grade aluminum plate is increased, must choose the quality of 5083 marine grade aluminum sheet in the latter part of the production to achieve better economic efficiency.
![[Image: Development-of-marine-grade-aluminum-plate.jpg]](http://marine-grade-aluminum-plate.com/images/demo/Development-of-marine-grade-aluminum-plate.jpg)
5083 marine grade aluminum plate is a typical magnesium aluminum silicon alloy, Due to the high requirements of marine grade aluminum plate, there is a special certification body for its industry certification, therefore, when customers buy 5083 marine grade aluminum sheet to see whether the relevant certification is the most direct way.
5083 marine grade aluminum sheet
On the other hand, the customer can test the samples before the products are purchased by the manufacturer, and compare the indexes of the products before purchasing, if they can meet the requirements of their own.
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| What are the common marine grade aluminum elbows alloys |
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Posted by: haomeialu - 02-05-2018, 05:54 AM - Forum: aluminium faq
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Common marine grade aluminum elbows models: 1060 aluminium elbow, 6061 aluminium elbow, 6063 aluminum elbow, 6082 aluminum elbow, 5083 aluminium elbow, etc. Here we take the 6061 aluminum elbow as an example to explain its technology and chemistry Composition: 6061 aluminium elbow.
6061 aluminium elbow is a high-quality aluminum alloy produced by the heat treatment pre-stretching process. Although its strength can not be compared with that of 2XXX series or 7XXX series, its magnesium and silicon alloy have many characteristics such as excellent processability and excellent welding Features and electroplating, good corrosion resistance, high toughness and deformation after processing, the material is dense and defect-free and easy to polish, the color film is easy, excellent oxidation and other excellent features.
![[Image: aluminum_90_degree_elbow-300x300.jpg]](http://www.aluminiumstrip-hm.com/wp-content/uploads/2018/07/aluminum_90_degree_elbow-300x300.jpg)
6061 aluminium elbow
The main alloying elements of the 6061 aluminum elbow are magnesium and silicon and form the Mg2Si phase. If a certain amount of manganese and chromium are contained, the bad effect of iron can be neutralized; sometimes a small amount of copper or zinc is added to increase the strength of the alloy without significantly reducing its corrosion resistance; and a small amount of conductive material Of copper to counteract the adverse effects of titanium and iron on conductivity; zirconium or titanium can refine grains and control recrystallized texture; and lead and bismuth can be added to improve machinability. Mg2Si solid solution in aluminum, the alloy has artificial aging hardening function. The main alloying elements of 6061 aluminum alloy are magnesium and silicon, with moderate strength, good corrosion resistance, weldability and good oxidation effect.
The chemical composition of its main chemical composition (the mass fraction of each element): Cu Cu: 0.15 ~ 0.4
Manganese Mn: 0.15
Magnesium Mg: 0.8 ~ 1.2 Shanghai Ling Hong 6061 aluminum plate (5 photos)
Zinc Zn: 0.25
Chromium Cr: 0.04 to 0.35
Titanium Ti: 0.15
Silicon Si: 0.4-0.8
Fe Fe: 0.7
Aluminum Al: balance
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| Mechanical properties of marine grade aluminum alloy |
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Posted by: aluhm - 02-05-2018, 03:49 AM - Forum: Knowledge & Technique
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The work environment of the ship requires that the structural material has certain mechanical strength, fatigue strength, elongation and impact resistance, and the welded structure also requires good welding strength. In shipbuilding, metal semi-finished products should be punched, bent, twisted, finishing and cutting operations, the material required to have a satisfactory shape. Thus, the mechanical properties of marine grade aluminum alloy design and construction of the ship is particularly important. In addition, marine grade aluminum alloy material development, development and production are also inseparable from the mechanical properties of the material.
5083 H32 marine grade aluminum alloy plate sheet
Hull structure aluminum alloy
The main structural material 5083 marine grade aluminum alloy shipbuilding the minimum yield strength, plate (O state) of 130Mpa, extrusion profiles (H112 state) of 110Mpa.5083-H32 marine grade aluminum alloy plate minimum yield strength is 220Mpa, butt welding The yield strength of the weld can be reduced to the O state value, so the design must use 130Mpa.6000 marine aluminum butt weld after T6 treatment, the yield strength value can only reach the T4 degree, so T4 state yield The intensity value becomes the standard. 6N01-T5 marine grade aluminum butt weld yield strength of the representative value of 120Mpa, the minimum yield strength value of 100Mpa is more appropriate.
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| What industries are Soundproof aluminum plate applied to |
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Posted by: haomeialu - 02-05-2018, 03:47 AM - Forum: aluminium faq
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Soundproof aluminum plate, a high-tech product, is a new material made of a special foaming agent after the aluminum is dissolved. Its super-light quality, but also has a good sound-absorbing, noise, buffer, electronic shielding, pollution-free and other excellent performance. Widely used in aerospace, military, construction, highway guardrail, urban noise walls, trains, cars, boats and other fields. After the advent of Soundproof aluminum plate, it has aroused a revolution in materials. Products have been warmly welcomed in the United States, Japan, Europe and Israel. The market has a bright future and huge profits.
soundproof aluminum plate
Vehicles (airplanes, trains, ships, yachts, cars) use it to reduce vibration and noise. For example, around the train engine, train floors, doors, ceiling applications, we have our own technology.(marine grade aluminum soundproof plate)
Road noise barriers, tunnels, subway vents, buildings (Grand Theater, gymnasium, meeting rooms and office buildings), factories (power plants, steel mills, tobacco factories and engines, steam turbines) sound-absorbing noise reduction use.
Military, armored vehicles, buildings used on it, because of the buffer effect, shells can not penetrate. Use it on shipping packages to reduce vibration and provide electromagnetic shielding. Impact protection for missiles, aircraft and their recovered compon
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| High performance 5083,6082 marine grade aluminum profiles |
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Posted by: haomeialu - 02-05-2018, 03:45 AM - Forum: Knowledge & Technique
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Aluminum is the largest non-ferrous metal in the world with a reduced weight due to the low density, high strength, rigidity and decay resistance of aluminum compared to a ship built using aluminum compared to a ship constructed of steel or other composite materials, 20%. The high toughness, corrosion resistance and weldability of the aluminum alloy provide a good choice for the construction of heavy-weight hulls. Due to the lower processing cost of aluminum and the outstanding physical properties of the aluminum alloy, the use of aluminum Shipbuilding is more economical. Aluminum can be used as a sheet, but also can be extruded and cast processing. From the ship's designer's point of view, ships made of aluminum alloy can achieve higher speeds and longer service life, and these advantages of aluminum alloys make them very fast for use in ships, making them modern ships The preferred material, the shipbuilding industry has provided a vast market for aluminum.
6082 marine grade aluminum profiles
With the continuous improvement of aluminum alloy production technology and technology, the requirements of modern ships for aluminum alloy materials are also getting higher and higher. High-performance marine aluminum products will be more able to adapt to the marine environment, and instead of the traditional steel plate, to achieve the ship's lightweight and energy-saving emission reduction, shipbuilding and aluminum alloy processing industry as a whole to enhance the efficiency.
haomei aluminium has developed a high-performance marine high-performance 5083 marine grade aluminum profiles, the marine product manufacturing industry chain has been extended and expanded, we have mastered the 5A01, 5A30, 6082 marine grade aluminum profiles behalf of the core technology of complete sets of manufacturing products, and now Has been successfully developed performance in line with GB / T6892 "general industrial aluminum and aluminum alloy extruded profiles," DNV DNV or other relevant standards for high-speed ship with aluminum extrusion profiles, excellent overall performance.
The marine industrial aluminum profiles for ships are widely used in hydrofoils, flying ships, speedboats, cruise ships, hovercraft, sailing ships, catamarans, patrol boats and passenger ferries. The application areas include the ship's side, bottom plating, keel, Ribs, next door, engine pedestal, deck, vessel top and side panels, chimneys, etc. With the rapid development of the shipbuilding industry, lightweight aluminum alloy wide profile wallboards have been extensively used in the manufacture of hull and superstructure. As the best connection method of aluminum alloy, friction stir welding effectively avoids the low efficiency of riveting, high cost, large deformation of arc welding, expensive consumables and high operation difficulty. It has become the preferred connection way of marine industrial aluminum profiles wall products.
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| Application of Foam Aluminum in Shipbuilding |
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Posted by: haomeialu - 02-05-2018, 03:43 AM - Forum: Knowledge & Technique
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1. General tugboat, noise reduction needs of the cargo engine room
Production of engine room sound-absorbing lining made of Foam aluminum acoustic board, Foam aluminum acoustic board thickness of 10mm, the cavity behind 30-60mm, can be more than 20 dB noise reduction.
2. Construction of passenger ships, mixed vessels, luxury boat structure needs
Made of Foam aluminum sandwich board passenger ships, mixed ships, yachts cabin, bay, door, floor, etc., the density of steel 1/20, light energy saving, the use of 1mm thick layer of aluminum floor, 20mm aluminum foam, 1mm Thick aluminum structure, the strength of the steel plate 7 times the weight to reduce more than 50%; partition wall and hatch 0.5mm thick aluminum plate can be used, 10mm thick aluminum foam, 0.5mm thick aluminum sandwich panel production, the strength is more than 3 times the plate , Sound insulation, good comfort, non-burning, corrosion-resistant.
Foam Aluminum in Shipbuilding
3. Submarine muffler, missile destroyer noise reduction needs
The sound absorption box, which is made up of the Foam aluminum sandwich board and the cavity behind it, can be installed in the engine compartment of the submarine to reduce the noise by more than 20 dB, which is good for manufacturing silent submarines.
4. Production of ship explosion-proof deck
Ship deck with armor plate, foam aluminum, steel composite structure, deck strength increased by 2 times more, antiknock, anti-missile capabilities increased by 2 times.
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| 2024 and 5754 marine grade aluminum alloy corrosion in seawater |
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Posted by: haomeialu - 02-05-2018, 03:42 AM - Forum: Knowledge & Technique
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2024 marine grade aluminum alloy
Durability of ductile aluminum is relatively low, mainly due to Cu. Someone had a very serious pitting corrosion after 16 days of testing coupons on a hard aluminum hull. The Soviet Union scholars D16AT alloy to the aluminum layer after the sample test 45 days, the loss of strength in Table 1, yield strength service Rp0.2 become significant.
As can be seen from the data in the table, the D16AT alloy plate without clad aluminum layer is severely corroded in seawater, however, the clad aluminum layer is much less corroded. Because the clad aluminum layer not only plays the role of protecting the alloy, but also plays an electrochemical protective role. For the 2XXX alloy, the 1XXX alloy clad aluminum layer is anodic, which ensures that the 2XXX alloy is protected from corrosion damage. Sometimes, even if the local aluminum layer is peeled off or suffered mechanical damage, it will not cause alloy corrosion because the clad aluminum layer in other parts still functions as a chemi-protection. This means that aluminum and aluminum superplastic corrosion resistance of the inherent deficiencies can be improved by conditioning the day after tomorrow.
5754 marine grade aluminum alloy
5754 marine grade aluminum alloy
The most resistant to seawater corrosion in aluminum alloy is 5XXX series of alloys, the corrosion rate in seawater is very slow, and their corrosion resistance and magnesium content. Alloys with Mg ≤ 5% have good corrosion resistance; alloys containing> 5% Mg tend to have intergranular corrosion and stress corrosion cracking tendency if they are not heat treated (annealed).
5754 marine grade aluminum alloy, 2024 marine grade aluminum alloy and shipbuilding steel immersed in 3% NaCl solution 9 months after the change in mechanical properties in Table 2, the corrosion resistance of aluminum-magnesium alloy than 2024 marine grade aluminum alloy and shipbuilding steel It is much stronger, not only the mass loss is small, but also the loss of mechanical properties is small, which shows that there are obvious superiorities in making the hull of aluminum-magnesium alloy.
The study by American scholar CW Civio pointed out that the 5754 marine grade aluminum alloy (containing 4.0% -4.9% Mg, one American alloy, stereotyped in the late 1930s) and 5086 alloy (containing 3.5% -4.5% Mg, also one American alloy, stereotyped in the early 40s of the last century, then grade 86S) and some other alloys were immersed in sea water without any protective measures. The maximum depth of corrosion pits in 5086-H34 alloy samples after 6 years was 0.86 mm, but no A large loss of strength; another test was to partially and totally dip unsplit and welded 5086 and 5083 marine aluminum sheets into Tonoconian water in Florida for 5 and 7 years. After 5 years, the strength loss of 5086 and 8083 samples of fully immersed unprotected welds was negligible. There was almost no corrosion pits found, and the maximum depth of corrosion pits was only 0.38 mm. In partially impregnated specimens, the 5086 and the 5083 alloy, which are not welded at 3.2 mm thick, have negligible strength loss regardless of immersion conditions, demonstrating that the 5086 and 5083 alloys retain intrinsic resistance to seawater stress corrosion.
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