Rims, what they are

All are on sale now rims can be divided into three large groups. This pressed steel, cast alloy and forged alloy wheels. Pressed steel wheels Wheel characteristics determine the quality of the machine running the least expensive and, hence, the most common are steel discs. They are made of steel sheet. Outer surface of the steel wheels in order to avoid corrosion of enamel, chrome, or elektrofareznym katafareznym or special powder coating layer. Their design consists of a rim and welded to it "dish". In addition to the price of steel has the advantage as plasticity. With this in bumps wheels do not break, but only bend (in the future you can restore them). In the same number of major shortcomings are: solid weight, reduced resistance to corrosion (coating discs is far from perfect) and the limited opportunity for design. This type of disc, usually used when a complete set of serial cars coming down the assembly line in the world. Cast alloy wheels Mostly for the manufacture of cast and forged wheels used aluminum alloys. Casting provides high quality products, lack of pores and pakovin in the metal. Alloy wheels are one hundred percent X-ray control, absence of marriage gapantipuyuschy finished products. Their production technology provides much higher accuracy, the absence of radial and lateral runout and better balanced. In addition, they are much lighter (20-30%) lighter than steel and virtually not affected by strain. Due to the smaller weight alloy wheels reduce unsprung mass significantly, which has a positive effect on ride and braking characteristics of the car. For this reason, improving the dynamics of acceleration and reduced fuel consumption cars. Cast disk drives are made of aluminum alloys possess high resistance to environmental effects (due to the formation of such resistance on the surface of the oxide film). True, because this film is deteriorating appearance of the disk, but the manufacturers cover the surface of a multilayer-coated. Lack of casting is that the product possesses the so-called free, non-directional layout of the crystal, which leads to thickening of the walls of the discs in order to ensure tpebuemoy mechanical ppochnosti. Unfortunately, the alloy wheels can not be recovered after a severe strain. In addition, although the drive is much lighter than steel, it is not as good in terms of maintaining the suspension. The impact energy is absorbed crushed items, so a steel disk is preferable, due to the fact that the cast and wrought are more durable and less creasing. They did not dampen the impact, and pass it into the harness. Forged alloy wheels These discs differ in the way of manufacturing: a hot-stamping with subsequent heat and / or machining. With the help of HOT forming (forging) achieved the highest ppochnost as STRUCTURE metal becomes fibrous, and guiding the fibers of these - originally given. This technology allows to reduce the wall thickness of disks is nearly 20% spavneniyu with cast. According to its superior performance forged steel and aluminum. They possess high corrosion resistance and does not need additional coverage, have high strength and stiffness, so that when struck forged wheels will not crack, but hesitated (in this strike must be very strong). Assembled disk drives Spectacular will transform even the most ordinary cars of its kind in the world of elite wheels. They combine the advantages of cast and wrought counterparts and consist of cast dishes and rim, produced by rolling. Between a part bolted and sometimes welded. Even rarer multisection drives, consisting of 3 - 4 segments. This allows the repair to replace the damaged part, without changing the entire drive. This design mostly used in expensive tuning cars. The price of such drives is very high. In addition to steel and aluminum alloys used in the production of magnetic alloys. In many respects they are superior to aluminum (for impact resistance, the least its own weight, etc.), but have a very serious drawback - the extremely low corrosion resistance. And for the Russian city roads that are now sprinkled with chloride compound, they are absolutely not suitable, because in just a few weeks may be borne by unaesthetic stains. There are also attempts to manufacture the wheels of ppochnyh plastics, but they have not yet received the broad Prevalence.