Plastic Parts
Metal processing method
Metal materials mainly have two processing methods: cold working and hot working.
Cold working:
1. In metallurgy, cold working refers to the processing of metal deformation at a temperature lower than the recovery installization temperature, such as cold rolling, cold drawing, cold forging, stamping, cold extrusion, and the like. The cold working deformation resistance is large, and the hardness and strength of the workpiece can be improved by work hardening while forming the metal.
2. In mechanical manufacturing technology, cold working usually refers to the cutting of metal.
Thermal processing:
Thermal processing is a processing method in which metal materials are simultaneously plastically deformed and recrystallized at a temperature higher than the recrystallization temperature.
Thermal processing usually includes casting, forging, welding, heat treatment and the like. Thermal processing enables the metal part to change its structure while forming or to change the formed part to a predetermined state to improve the mechanical properties of the part.
Metal materials mainly have two processing methods: cold working and hot working.
Cold working:
1. In metallurgy, cold working refers to the processing of metal deformation at a temperature lower than the recovery installization temperature, such as cold rolling, cold drawing, cold forging, stamping, cold extrusion, and the like. The cold working deformation resistance is large, and the hardness and strength of the workpiece can be improved by work hardening while forming the metal.
2. In mechanical manufacturing technology, cold working usually refers to the cutting of metal.
Thermal processing:
Thermal processing is a processing method in which metal materials are simultaneously plastically deformed and recrystallized at a temperature higher than the recrystallization temperature.
Hot working
Thermal processing usually includes casting, forging, welding, heat treatment and the like. Thermal processing enables the metal part to change its structure while forming or to change the formed part to a predetermined state to improve the mechanical properties of the part.
Advantages of cold working:
The desired shape can be obtained while strengthening the metal;
Good dimensional tolerances and surface roughness are obtained;
Cheap
Some metals can only be subjected to a limited degree of cold working because they exhibit brittleness at room temperature;
Cold working impairs ductility, electrical conductivity and corrosion resistance. However, the degree of decrease in conductivity due to cold working is less than that of other reinforced processes, so cold working is also used to strengthen conductive materials such as copper wire;
They also bring benefits if the anisotropic properties and residual stress are properly controlled. If not properly controlled, material performance will be greatly impaired;
Since the effect of cold working can be reduced or even disappeared at high temperatures, cold work strengthening is not suitable for those working in high temperature environments;
