Expertise to introduce flange

Billet of metal (excluding plate) the imposition of external force to produce plastic deformation, changes in size, shape and improve the performance, for the manufacture of machine parts, flange, workpieces, tools or methods of forming the rough.

The type and characteristics of forging

When the temperature is over 300-400 ℃ (steel blue brittle region), to 700-800 ℃, the deformation resistance will be reduced dramatically, the deformation can also be significantly improved. In accordance with the temperature in different regions of the forging, forgings for the quality and the different forging process can be divided into cold forging, warm forging, hot forging three molding temperature region. This temperature region was divided into no hard and fast boundaries, generally speaking, in the recrystallization temperature region is called forging hot forging, non-heating of the forging at room temperature is called cold forging.

Forging at low temperatures, the forging of a very small size changes. The following forging at 700 ℃, the formation of small oxide and surface decarburization phenomenon no. Therefore, as long as the deformation can be in the range of forming, cold forging easy access to good dimensional accuracy and surface finish. As long as the temperature control of cooling and lubrication, 700 ℃ temperature and forging the following can also get very good accuracy. Hot forging, as a result of deformation energy and deformation resistance are very small, complex shapes can be forged large forgings. To obtain high dimensional accuracy of forgings, 900-1000 ℃ temperature in hot forging process with the region. In addition, attention should be paid to improving the working environment of hot forging. Forging die life (forging 2-5 1000,10000 Warm Forging 1-2, 2-5 cold forging 10,000) and other temperature domain is relatively short compared to the forging, but it's freedom, and low cost.

Blank in the cold forging to produce deformation and work hardening, so that forging die under high load, therefore, need to use high-intensity use of the forging die and bonded to prevent wear and lubricating film rigid approach.

In addition, to prevent the billet crack, intermediate annealing necessary to ensure that the needs of the deformation capacity. In order to maintain good lubrication can be carried out on the blank phosphate processing. The use of bar and wire rod for continuous processing, the current cross-section also can not be dealt with lubrication, lubrication is studying methods of use of the possibility of phosphide.