The reason for the change in the structure and performance of the straight wire drawing machine may be that when the polycrystal is plastically deformed, the deformation of each grain and the interior of the same grain is not uniform, and the elastic recovery of each grain after the external force is removed. different, so there is stress.
Plastic deformation increases the activity of atoms, resulting in a decrease in the corrosion resistance of metals. The plastic deformation of metal parts includes volume deformation, warpage deformation and aging deformation in terms of macroscopic morphological characteristics. The volume deformation of the straight wire drawing machine refers to the phenomenon that the volume of the metal parts expands and contracts due to the change of the mass and heat capacity caused by the transformation of the metallographic structure during the heating and cooling process of the metal parts.
In the field of straight wire drawing machines, the economic loss caused by metal corrosion is huge. Corrosion is the phenomenon that the metal is damaged by the action of the surrounding medium. This damage is the chemical reaction of the metal parts in some specific environments. and electrochemical reactions.
Corrosion damage always starts from the metal surface, and then goes deeper or faster, causing surface material loss, surface quality damage, internal crystal structure damage, and irregular-shaped pits, spots, etc. area, resulting in the failure of the wire drawing machine.
Metal corrosion can be divided into two categories: chemical corrosion and electrochemical corrosion. Chemical corrosion of metals is corrosion caused by pure chemical action. When the surface material of metal parts reacts chemically with the surrounding gas or harmful components in the electrolyte liquid, a corrosion layer is formed on the metal surface, and the parts are corroded in the process of continuous shedding and continuous formation of the corrosion layer.
