Why is forging increasingly important?

In the process of plastic forming, cracks often appear on the surface or inside of the metal, and even lead to the fracture or scrap of the forgings of Hangsheng and forging company. Therefore, it is necessary to study the physical nature of the cracking phenomenon and various factors affecting the cracking to further improve the plastic deformation performance of the metal and prevent the cracking of the workpiece. Fracture can be classified from many angles. From the macroscopic perspective, it can be roughly divided into brittle fracture and ductile fracture in terms of the amount of deformation before fracture. Brittle fracture has no plastic deformation or only small plastic deformation before fracture, and the fracture is relatively flat and slightly glossy. The ductile fracture has undergone significant plastic deformation before fracture, and the fracture is fibrous and dark. The fracture form of 42CrMo steel studied in this chapter is ductile fracture, so the following refers to ductile fracture unless otherwise specified.

Ductile fracture of metals generally refers to the internal microdefects of metal materials, such as microcracks and microvoids, which will nucleate, grow, converge and lead to the gradual deterioration of materials after severe plastic deformation under the action of external loads. When a certain degree of strain is reached, macroscopic fracture of materials will occur. The main characteristics are obvious macroscopic plastic deformation, such as excessive bulging of the container, excessive elongation or bending of the forgings, etc., and the fracture size has a great change compared with the original size.

Forging production is one of the main processing methods to provide machine parts blank in machinery manufacturing industry. Through THE FORGING OF HANGSHENG FORGING COMPANY, not only the shape of the mechanical parts can be obtained, but also the internal organization of the metal can be improved, and the mechanical and physical properties of the metal can be improved. In general, the important mechanical parts with high force and high requirements are mostly manufactured by forging production method. Such as turbine generator shaft, rotor, impeller, blade, guard ring, large hydraulic press column, high pressure cylinder, rolling mill roll, internal combustion engine crankshaft, connecting rod, gear, bearing, and defense industry aspects of the gun and other important parts, are produced by forging.

Therefore, forging production is widely used in metallurgy, mining, automobiles, tractors, harvesting machinery, petroleum, chemical industry, aviation, aerospace, weapons and other industrial sectors, is in daily life, forging production also has an important position.