Forging manufacturer: the purpose and requirements of heating in the forging process
Forging Manufacturer: Machining of mechanical forgings is the process of changing the size or function of forgings with various machines. With the rapid development of modern machining and machining skills, a large number of machining skills have gradually emerged. Now the mass processing has put forward higher requirements for production skills, not only to achieve high precision in the shape and position of the scale, but also to achieve a high quality of appearance. The following forging manufacturer Bian Xiao will share with you the purpose and requirements of heating in large machining forgings.
Forging manufacturer: . The purpose and requirements of heating forgings
1. The purpose of heating: to improve the plasticity of the metal, reduce its deformation resistance, so that it is easy to shape, forging to obtain good microstructure and mechanical properties.
2. Heating requirements.
(1) in the metal material allowed temperature conduction and internal stress conditions, rapid heating to a predetermined temperature, increase production, save energy.
(2) minimize the absorption of oxygen, hydrogen, nitrogen and other harmful gases, reduce oxidation, decarburization or hydrogen embrittlement and other defects, and improve the heating quality of forgings.
(3) In the low-temperature heating stage, prevent improper heating from causing excessive temperature difference between the outer layer and the core of the metal profile, resulting in excessive thermal stress, superimposed on other internal stresses and causing material fracture.
(4) Accurately implement the prescribed heating specifications, such as heating temperature, speed, time, holding and other heating conditions, to prevent defects such as overheating and over-burning.
Second, forging manufacturers: part of the blank relative to another part of the forging process of rotating a certain angle around its axis is called torsion, commonly used in forging crankshafts, connecting rods, twist drills and other forgings of different planes. The main points of operation are as follows.
1. To prevent defects caused by the violent deformation of the metal during twisting, the surface of the twisted part is smooth and free of defects. For thick and short journals, rough turning is followed by twisting.
2. The twisted part is heated to the plastic temperature range and is heated uniformly along its length.
3. The angle of twist should normally not exceed 90 degrees. If the twisting angle is greater than required, turning back to the limit angle is not permitted.
4. The billet should be cooled slowly after twisting and the strictly forged parts should be annealed.
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