Forging is the process of shaping metal, and is a common practice in a range of manufacturing industries. There are various types of forging, and these are often distinguished by the temperature at which it is conducted. The 3 independent classifications are cold, warm and hot, with the most popular types of metal including iron and steel almost universally forged hot. The process has many advantages and also some disadvantages to the companies that use it.
The Benefits of Forging
Forging is almost entirely beneficial process from the point of view of those who use the finished product. The process of forging often produces a piece of metal that is far stronger than a piece that has been fortified by a machine part or cast. In terms of metals such as steel and iron, which are the most commonly utilized materials within the construction industry, this strength and durability is key to their appeal and the tasks that they perform.
The grain of the metal is also fortified by the process of forging, allowing it to remain continuous through the part as it is worked upon. As it is shaped, the grain melds to the specific outline of the part, which only increases the strength of the material and the actual metal part. These facets of forging at heat ensure that it remains especially popular when it comes to shaping steel and iron, and guarantee a high quality product for the receiver.
The Shortages of Forging
In terms of hot forging, there can be issues for parts which are required to go through a secondary mechanical process afterwards. For any secondary process that needs to be carried out after a metal item has been forged, it must have undergone the work hardening process that would ensure from cold forging. Hot forging can prevent this, although in many cases there are more economic and easy to control alternatives to work hardening anyway.
In any case some forgings, such as aluminum alloy pieces and titanium, can be work hardened after hot forging so the issue is not an overly significant one. The only considerable drawback to forging are the costs involved in paying for machinery and tooling.
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Casting is the literal meaning. The aluminum alloy raw material is heated and melted into a liquid, and then poured into the mold. After cooling and solidification, it becomes a wheel rim. Casting wheels are also divided into low-pressure casting and high-pressure casting. Low pressure casting has low cost and fast production pace, and the original wheelrims are generally low pressure casting. In order to pursue the lightweight effect, the modified rim will pressurize after the aluminum water mold, so that the molecules of the metal after cooling are more closely combined, so as to optimize the mechanical properties and achieve the lightweight effect.
Forging a wheel rim is to directly "pinch" aluminum into a wheel rim, relying on a forging press that can generate tens of millions of tons of forging pressure. Because the forgedrim does not need to undergo the melting-solidification process, the molecular shape does not change, the molecular bond does not break, and in the process of pressure forging, the intermolecular bonding becomes tighter, so the mechanical properties are better than castrims . In theory, monolithic forging can achieve the greatest rigidity-to-weight ratio. This means that for the same weight, the rigidity of the forged rim is higher (that is, commonly known as "hard"); or at another angle, to achieve the same rigidity goal, the forgedrim can be made lighter.
What are the disadvantages of forged wheels besides being expensive?
Because the
forged wheel rim
is to "pinch" a piece of aluminum alloy into a wheelrim, and the ductility of the aluminum alloy is not very strong, so: 1. The freedom of design of the forged wheel rim is relatively limited; 2. Since it is to "pinch" , In addition to the limited freedom of modeling, excellent raw materials cannot be used, otherwise it will be difficult to form; and it is extremely difficult to "pinch" thick and dense spokes in the forging process, and the transition between the spokes and the "rim" is also difficult to make. Very thick thickness for extreme strength. For these two reasons, the challenge of extremely high hardness still relies on the casting process.
