Shod wheel disks

The second method of manufacture light-alloy disks is the smithery, or as experts speak, hot volume punching. Therefore and shod disks often name stamped (not to confuse with steel stamped). A shod wheel disk

Pluses of shod disks:

At a smithery strength above is reached, than at molding as there is a crushing of grains, their deformation and a pulling in the necessary direction - as a result metal structure to become fibrous. At the expense of it reduction of a thickness of walls of a shod disk approximately on 20 % in comparison with the cast is possible. High strength of a material of disks provides with it good weight characteristics: the weight of a shod disk on 30-50 % is less than weight steel and on 20-30 % of the similar cast. Thanks to high plasticity such disk doesn't collapse after strong blow, and is deformed on similarity of the steel. Stamped magnesian disks possess good corrosion firmness, and aluminum and at all it is possible to use without a paint and varnish covering. In general, the shod disk has incorporated all advantages cast and steel stamped colleagues, thus having got rid of their lacks.

Minuses of shod disks:

Essential lack is very low operating ratio of a material making 30-40 % that considerably increases product cost.

The production technology of shod disks:

Initial preparation warm up to temperature at which the alloy gets the highest plasticity (an order 400-470 0С), then warmed up under the influence of a press it is kneaded in the special form, and on an exit a certain similarity of a wheel turns out. Disks produced by such method can pass thermal processing, and can and not pass. All is defined by alloy structure. Often mechanical characteristics of the disks which have passed thermal processing, and without that, made of different alloys, practically don't differ. If thermal processing is made, it engages training with the subsequent aging. After goes on machining, then drawing of decorative coverings is carried out. Such manufacturing techniques allow to receive the disks which material has strength comparable to a steel, and plasticity below all on 20-30 %. By manufacture of shod disks alloys on the basis of aluminum and magnesium are widely applied.

The conclusion

All over the world such disks in the majority are established on expensive sports and racing cars. The matter is that recently the enterprises of a military-industrial complex for conversion have mastered manufacture of shod wheels the prices on which manage to be kept at enough low level (on the average the price of disks of the Russian manufacture less than the western analogs in 10 times!), and on quality they aren't worse than the import. In other words speaking, to new heads metallurgical factories has got in the inheritance (national good) the press for a smithery, which cost not one million. It is necessary to give to them due. They have mastered them and please us with inexpensive shod disks. The foreign private companies don't presume to themselves such investments (since it is necessary for paying back somehow), therefore in the West are made, basically, cast wheels. They make approximately 80 % from total amount of release light-alloy wheels.