Aluminum alloy has a low melting point and good casting performance. Especially those with high requirements, complicated inner cavity, large thickness, and high strength are irreplaceable.
Among them, the surface quality of the products produced by the aluminum alloy gravity casting process is excellent, the dimensional accuracy reaches CT7 level, and China Aluminum alloy parts Foundry there are no sand holes inside. When the product size is large and the production quantity is small, the aluminum alloy gravity casting process can not only obtain high quality It is a good choice because it can greatly reduce mold costs.
The production process of aluminum alloy is divided into: high pressure casting, aluminum alloy gravity casting, sand casting, dewaxing casting, low pressure casting, etc. Sometimes some products that can be produced by the die-casting process are also produced by the aluminum alloy gravity casting process, because the aluminum alloy gravity casting process molds are cheaper.
After T6 heat treatment, it can reach high mechanical strength, above 290MPA, which is higher than the quality of products produced by the die casting process. It is widely used in many fields such as automobiles, medical treatment, automation, and industrial robots
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Among them, the surface quality of the products produced by the aluminum alloy gravity casting process is excellent, the dimensional accuracy reaches CT7 level, and China Aluminum alloy parts Foundry there are no sand holes inside. When the product size is large and the production quantity is small, the aluminum alloy gravity casting process can not only obtain high quality It is a good choice because it can greatly reduce mold costs.
The production process of aluminum alloy is divided into: high pressure casting, aluminum alloy gravity casting, sand casting, dewaxing casting, low pressure casting, etc. Sometimes some products that can be produced by the die-casting process are also produced by the aluminum alloy gravity casting process, because the aluminum alloy gravity casting process molds are cheaper.
After T6 heat treatment, it can reach high mechanical strength, above 290MPA, which is higher than the quality of products produced by the die casting process. It is widely used in many fields such as automobiles, medical treatment, automation, and industrial robots
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Aluminum alloy castings and die castings are mainly used in vehicles, motorcycles and other transportation tools, followed by electronics, electrical appliances, home appliances and small hardware. my country is moving towards 150 kilograms. The average amount of aluminum used per car is 200 kilograms in industrially developed areas, and the highest has reached 380 kilograms (cars).
The output of aluminum alloy casting products in my country has reached 2.8 million tons, of which die castings account for more than 55%, low pressure casting products account for about 25%, sand casting products output about 20%, and other casting products output about 3%, with an average annual growth rate. Therefore, in the past few decades, cast aluminum alloy materials have closely followed the requirements of the development of modern transportation industries such as automobiles and motorcycles, and have developed high strength, high toughness, high wear resistance, low expansion and contraction, China Aluminum alloy parts weldability, surface treatment, Aluminum alloys for casting and die-casting with corrosion resistance, fatigue resistance and good fluidity can meet the needs of automobile engines, pistons, cylinders, wheels and other applications.
In recent years, with the rapid and sustained development of the national economy, especially the rapid development of modern transportation, aerospace and electromechanical industries, not only the number of aluminum alloy castings has increased greatly, but also the quality requirements have become higher and higher. Aluminum alloy vehicles have been gradually promoted from motorcycles to cars, medium-sized vehicles, and heavy-duty vehicles.
At present, about 10% of primary aluminum and 85% of secondary aluminum in the world are used to produce aluminum alloy castings. At present, the world’s annual output of automobiles is about 70 million, and the number of automobiles is 800 million. Therefore, there are higher requirements for the composition and performance of cast and die-cast aluminum alloys. It can be said that the development of automobiles is the real driving force of aluminum alloy casting products. For example, the wheels of automobiles and motorcycles have basically used aluminum. Currently, the world needs more than 300 million aluminum alloy wheels per year, and my country has built a production capacity of 150 million per year. With the rapid development of modern vehicles such as automobiles and motorcycles, there is a lot of room for aluminum alloy casting products. In 2010, my country’s automobile production has exceeded 18 million, and the number of automobiles has exceeded 80 million.
If aluminum alloy castings and die castings account for 75% of automotive aluminum, then the number of automotive aluminum alloy casting products is very considerable. In recent years, they have also begun to be widely used in aerospace, machinery manufacturing and other industries. In 2010, the world’s aluminum and aluminum alloy casting products reached 22 million tons, of which die castings accounted for more than 60%, low pressure castings and sand castings each accounted for about 20%, and the annual growth rate was about 10%
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The output of aluminum alloy casting products in my country has reached 2.8 million tons, of which die castings account for more than 55%, low pressure casting products account for about 25%, sand casting products output about 20%, and other casting products output about 3%, with an average annual growth rate. Therefore, in the past few decades, cast aluminum alloy materials have closely followed the requirements of the development of modern transportation industries such as automobiles and motorcycles, and have developed high strength, high toughness, high wear resistance, low expansion and contraction, China Aluminum alloy parts weldability, surface treatment, Aluminum alloys for casting and die-casting with corrosion resistance, fatigue resistance and good fluidity can meet the needs of automobile engines, pistons, cylinders, wheels and other applications.
In recent years, with the rapid and sustained development of the national economy, especially the rapid development of modern transportation, aerospace and electromechanical industries, not only the number of aluminum alloy castings has increased greatly, but also the quality requirements have become higher and higher. Aluminum alloy vehicles have been gradually promoted from motorcycles to cars, medium-sized vehicles, and heavy-duty vehicles.
At present, about 10% of primary aluminum and 85% of secondary aluminum in the world are used to produce aluminum alloy castings. At present, the world’s annual output of automobiles is about 70 million, and the number of automobiles is 800 million. Therefore, there are higher requirements for the composition and performance of cast and die-cast aluminum alloys. It can be said that the development of automobiles is the real driving force of aluminum alloy casting products. For example, the wheels of automobiles and motorcycles have basically used aluminum. Currently, the world needs more than 300 million aluminum alloy wheels per year, and my country has built a production capacity of 150 million per year. With the rapid development of modern vehicles such as automobiles and motorcycles, there is a lot of room for aluminum alloy casting products. In 2010, my country’s automobile production has exceeded 18 million, and the number of automobiles has exceeded 80 million.
If aluminum alloy castings and die castings account for 75% of automotive aluminum, then the number of automotive aluminum alloy casting products is very considerable. In recent years, they have also begun to be widely used in aerospace, machinery manufacturing and other industries. In 2010, the world’s aluminum and aluminum alloy casting products reached 22 million tons, of which die castings accounted for more than 60%, low pressure castings and sand castings each accounted for about 20%, and the annual growth rate was about 10%
https://www.best-autoparts.com/product/gravity-casting/four-cylinder-head.html
The resistance spark plug is equipped with a ceramic resistor of 5-10Ω in the spark plug, and the shielded spark plug uses a metal shell to shield and seal the entire spark plug. It has a wide heat range and can meet a variety of purposes. Electrode type spark plug: Its electrode is very thin, it is characterized by strong spark and good ignition ability.
Seat-type spark plug: Its shell and screw thread are made into a cone, so a good seal can be maintained without a gasket, thereby reducing the size of the spark plug, which is more beneficial to the design of the engine. It can ensure the engine to start quickly and reliably even in the severe cold season. Polar type spark plug: Generally there are two or more side electrodes. Spark plug with protruding edge body: the insulator skirt is longer, protruding beyond the end surface of the shell. Shielded spark plugs can not only prevent radio interference, but also can be used in waterproof and explosion-proof applications.
Quasi-type spark plug: The insulator skirt is slightly retracted into the end face of the shell, and the side electrode is outside the end face of the shell. The advantage is reliable ignition, and the gap does not need to be adjusted frequently. Parts-In addition, in order to suppress the interference of the car ignition system on the Casting Auto Mould radio, resistance and shielded spark plugs have been produced.; if you are more professional, the types of spark plugs are roughly as follows Species: It has the advantages of large heat absorption and good pollution resistance, and can be directly cooled by the intake air to reduce the temperature, so it is not easy to cause hot ignition, so the thermal adaptation range is wide.
Therefore, it is often used in some gasoline engines where the electrode is easy to ablate and the spark plug gap cannot be adjusted frequently. It is the most widely used one. parts-according to the calorific value, there are cold type and hot type; according to the electrode material, there are nickel alloy, silver alloy and platinum alloy, etc. Surface flashover spark plug: it is the surface gap type, it is a kind of cold spark plug, the gap between the center electrode and the shell end surface is concentric
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Seat-type spark plug: Its shell and screw thread are made into a cone, so a good seal can be maintained without a gasket, thereby reducing the size of the spark plug, which is more beneficial to the design of the engine. It can ensure the engine to start quickly and reliably even in the severe cold season. Polar type spark plug: Generally there are two or more side electrodes. Spark plug with protruding edge body: the insulator skirt is longer, protruding beyond the end surface of the shell. Shielded spark plugs can not only prevent radio interference, but also can be used in waterproof and explosion-proof applications.
Quasi-type spark plug: The insulator skirt is slightly retracted into the end face of the shell, and the side electrode is outside the end face of the shell. The advantage is reliable ignition, and the gap does not need to be adjusted frequently. Parts-In addition, in order to suppress the interference of the car ignition system on the Casting Auto Mould radio, resistance and shielded spark plugs have been produced.; if you are more professional, the types of spark plugs are roughly as follows Species: It has the advantages of large heat absorption and good pollution resistance, and can be directly cooled by the intake air to reduce the temperature, so it is not easy to cause hot ignition, so the thermal adaptation range is wide.
Therefore, it is often used in some gasoline engines where the electrode is easy to ablate and the spark plug gap cannot be adjusted frequently. It is the most widely used one. parts-according to the calorific value, there are cold type and hot type; according to the electrode material, there are nickel alloy, silver alloy and platinum alloy, etc. Surface flashover spark plug: it is the surface gap type, it is a kind of cold spark plug, the gap between the center electrode and the shell end surface is concentric
https://www.best-autoparts.com/mold/
In order to improve the structure and surface quality of the billet in vertical casting, electromagnetic crystallization tanks, short crystallization tanks and hot top casting methods have also been developed (see solidification of metals). The thickness of the aluminum clad layer is generally 4% of the thickness of the sheet. The deformation rate of the first few passes is generally within 10%, and it will gradually increase in the future.
For hard aluminum alloys such as LY12 and LC4 with complex chemical composition, homogenization treatment should be carried out before hot rolling. The water-cooled semi-continuous casting method is to introduce liquid metal into a water-cooled crystallizer through a launder, so that the liquid metal is cooled to form a solidified shell, which is pulled by the base of the casting machine or dropped out of the crystallizer by its own weight to form an ingot. The hot-rolling billet temperature of LY11, LY12 and other alloys is 400～455℃.
The clad aluminum of duralumin is to place the clad aluminum plate on both sides of the milled billet and join by hot rolling. The total deformation rate of hot rolling can reach more than 90%. In order to improve the yield and production efficiency, develop large ingot rolling, which weighs more than 10 to 15 tons. The hot-rolled strip is used as cold-rolled billet after coiling. In factories with an output of more than 100,000 tons, most of the four-high reversible hot rolling mills adopt single-stand, two-stand, three-stand, and five-stand continuous rolling after the billet is opened.
Hot rolling can be carried out on a single-stand reversing mill or continuous rolling on multiple stands. Plate and strip production adopts flat roll rolling, and the basic processes are hot rolling, cold rolling, heat treatment and finishing. Generally, the casting speed and cooling rate should be increased as much as possible, and the height of the crystallization tank should be reduced. Hot rolling is generally performed above the recrystallization temperature. The pass deformation rate of pure aluminum and soft aluminum alloy can reach 50%, and that of hard aluminum alloy is about 40%. For factories with an annual output of less than 100,000 tons, four-roll reversible hot rolling and hot coiling are generally used, and the thickness of the hot-rolled strip is about 6-8 mm.
The process parameters vary greatly due to the alloy composition and billet size. In addition, the continuous casting and rolling process of aluminum strip has been developed. The treatment temperature is generally lower than the eutectic temperature of the low-melting phase in the alloy by 10-15°C, and the temperature is maintained for 12-24 Torque Converter Housing Foundry hours.5-3.5 Mm. The casting temperature is usually 50 to 110°C higher than the liquidus line of the alloy. The hot finish rolling is implemented, and the strip thickness can reach 2. In order to preserve the plasticity of the metal, hot rolling should be carried out in a single-phase structure.Aluminum casting generally adopts vertical or horizontal water-cooled semi-continuous casting method
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For hard aluminum alloys such as LY12 and LC4 with complex chemical composition, homogenization treatment should be carried out before hot rolling. The water-cooled semi-continuous casting method is to introduce liquid metal into a water-cooled crystallizer through a launder, so that the liquid metal is cooled to form a solidified shell, which is pulled by the base of the casting machine or dropped out of the crystallizer by its own weight to form an ingot. The hot-rolling billet temperature of LY11, LY12 and other alloys is 400～455℃.
The clad aluminum of duralumin is to place the clad aluminum plate on both sides of the milled billet and join by hot rolling. The total deformation rate of hot rolling can reach more than 90%. In order to improve the yield and production efficiency, develop large ingot rolling, which weighs more than 10 to 15 tons. The hot-rolled strip is used as cold-rolled billet after coiling. In factories with an output of more than 100,000 tons, most of the four-high reversible hot rolling mills adopt single-stand, two-stand, three-stand, and five-stand continuous rolling after the billet is opened.
Hot rolling can be carried out on a single-stand reversing mill or continuous rolling on multiple stands. Plate and strip production adopts flat roll rolling, and the basic processes are hot rolling, cold rolling, heat treatment and finishing. Generally, the casting speed and cooling rate should be increased as much as possible, and the height of the crystallization tank should be reduced. Hot rolling is generally performed above the recrystallization temperature. The pass deformation rate of pure aluminum and soft aluminum alloy can reach 50%, and that of hard aluminum alloy is about 40%. For factories with an annual output of less than 100,000 tons, four-roll reversible hot rolling and hot coiling are generally used, and the thickness of the hot-rolled strip is about 6-8 mm.
The process parameters vary greatly due to the alloy composition and billet size. In addition, the continuous casting and rolling process of aluminum strip has been developed. The treatment temperature is generally lower than the eutectic temperature of the low-melting phase in the alloy by 10-15°C, and the temperature is maintained for 12-24 Torque Converter Housing Foundry hours.5-3.5 Mm. The casting temperature is usually 50 to 110°C higher than the liquidus line of the alloy. The hot finish rolling is implemented, and the strip thickness can reach 2. In order to preserve the plasticity of the metal, hot rolling should be carried out in a single-phase structure.Aluminum casting generally adopts vertical or horizontal water-cooled semi-continuous casting method
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