Forging process and forging characteristics


Date:

2023-09-28

Forgings by plastic deformation to shape the required shape or suitable compression force of the object. This is achieved by using a hammer or pressure. After forging, the structure and mechanical properties of the metal can be improved. The forging process can ensure the continuity of the metal fiber structure, make the fiber structure of the forging consistent with the shape of the forging, and the metal streamline is complete, which can ensure that the parts have good mechanical properties and Long service life.

Forgings by plastic deformation to shape the required shape or suitable compression force of the object. This is achieved by using a hammer or pressure. After forging, the structure and mechanical properties of the metal can be improved. The forging process can ensure the continuity of the metal fiber structure, make the fiber structure of the forging consistent with the shape of the forging, and the metal streamline is complete, which can ensure that the parts have good mechanical properties and Long service life.

The process flow of hot die forging is as follows: blanking of forging blank; Heating of forging blank; Roll forging and preparing blank; Die forging and forming; Cutting edge; Punching; Correction; Intermediate inspection to inspect the size and surface defects of forgings; Heat treatment of forgings to eliminate forging stress and improve metal cutting performance; Cleaning, mainly to remove surface oxide scale; Correction; Inspection, forgings shall undergo appearance and hardness inspection, chemical composition analysis, mechanical properties, residual stress and other tests and non-destructive testing are also required.

Forging materials are mainly carbon steel and alloy steel of various components, followed by aluminum, magnesium, copper, titanium and their alloys. The original state of the material is bar stock, ingot, metal powder and liquid metal. Forging can be divided into free forging, upsetting, extrusion, die forging, closed die forging, closed upsetting. The movement mode of forging die, forging can be divided into rotary forging, swing forging, roll forging, wedge cross rolling, ring rolling and oblique rolling. Rotary forging, swing swaging and ring forging can also be used for precision forging. Forgings need to be consistent in each piece, without porosity, excess space, inclusions or other imperfections. The advantages of forgings are extendable length, retractable cross-section; retractable length, extendable cross-section; changeable length, changeable cross-section. The forgings used in diesel engines include cylinder head, main journal, crankshaft end flange, output end shaft, connecting rod, piston rod, piston head, crosshead pin shaft, crankshaft transmission gear, ring gear, intermediate gear and dye oil pump body.

Key words:

Forgings
Flange

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