Process for removing oxide skin on surface of forge piece

Abstract

The invention discloses a process for removing oxide skin on the surface of a forge piece, and belongs to the field of forging. The process for removing the oxide skin on the surface of the forge piece. According to the process, the forge piece with the oxide skin is pretreated, so that magnetic powder and liquid permeate into the gaps of the oxide skin, and then the liquid in the oxide skin is rapidly vaporized in a heating mode that the temperature rises suddenly; the oxide skin quickly expands in a short time, so that an intensive outward squeezing force is generated for the oxide skin. Compared with the prior art, the process remarkably accelerates the disintegration of the oxide skin, improves the maintenance skin removing efficiency, reduces the cost, and prevents the surface of the forge piece from being damaged easily. In addition, when the oxide skin is cut by a pneumatic ball cutter, an air column drives a traction rope to knock the oxide skin, and meanwhile, the magnetic powder layer and the traction rope attract each other, so that the magnetic powder generates outward thrust on the oxide skin from the inside, and the speed of separating the oxide skin from the forge piece is further increased.

Description

technical field [0001] The invention relates to the field of forging, in particular to a process for removing scale on the surface of forgings. Background technique [0002] Forging is a processing method that uses forging machinery to apply pressure to metal blanks to cause plastic deformation to obtain forgings with certain mechanical properties, certain shapes and sizes. It is one of the two major components of forging (forging and stamping). Forging can eliminate defects such as as-cast porosity produced in the metal smelting process and optimize the microstructure. At the same time, due to the preservation of complete metal flow lines, the mechanical properties of forgings are generally better than castings of the same material. For important parts with high loads and severe working conditions in related machinery, forgings are mostly used, except for plates, profiles or weldments that can be rolled with simpler shapes. [0003] During the forging process of the forgin...

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Problems solved by technology

[0003] During the forging process of the forging, a large amount of oxide skin will be produced due to the overflow of impurities and oxidation. Most of the oxide skin will be removed from the surface of the forging during the forging process, but some oxide skin is still attached to the surface of the forging and has not been removed. The surface of the forging The scale will lead to electrochemical corrosion of forgings. Therefore, before the forgings are processed into gas parts, the residual scale on the surface needs to be cleaned. In the prior art, high-pressure water dephosphorization or pickling is generally used, but this The cost of the two methods is high, and it is easy to cause damage to the surface of the forging

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