Forging Technology and Forging Characteristics
作者：admin 来源：本站 发布时间：2019-10-14 07:10:06 浏览量：
Forgings are shaped by plastic deformation into desired shapes or objects with suitable compressive forces. By using a hammer or pressure. After forging, the structure and mechanical properties of metal can be improved. Forging can ensure the continuity of the structure of metal fibers, keep the fiber structure of forgings consistent with the shape of forgings, complete metal streamline, and ensure that parts have good mechanical properties and long service life. The technological process of hot die forging is as follows: blanking of forging billet; heating of forging billet; roll forging billet; die forging forming; trimming; punching; rectification; intermediate inspection to check the size and surface defects of forgings; heat treatment of forgings to eliminate forging stress and improve metal cutting performance; cleaning, mainly removing surface oxide skin; rectification; inspection, forgings to pass the appearance and hardness inspection, but also. After chemical composition analysis, mechanical properties, residual stress testing and non-destructive testing. Forging materials are mainly carbon steel and alloy steel with various components, followed by aluminium, magnesium, copper, titanium and their alloys. The original state of the material is bar, ingot, metal powder and liquid metal. Forging can be divided into free forging, upsetting, extrusion, die forging, closed die forging and closed upsetting. Forging can be divided into rotary forging, rotary forging, roll forging, cross wedge rolling, ring rolling and skew rolling. Rotary forging, rotary forging and ring forging can also be used for precision forging. Forgings need to be consistent with each piece, without any porosity, excess space, inclusions or other defects. Forging has the advantages of stretchable length and shrinkable cross section; shrinkable length and stretchable cross section; variable length and variable cross section. The forgings used in diesel engine include cylinder head, main journal, crankshaft end flange output shaft, connecting rod, piston rod, piston head, cross pin shaft, crankshaft transmission gear, gear ring, intermediate gear and dyeing pump body, etc.
