How to determine the extrusion temperature of brass plate

1, copper and brass plate extrusion temperature should have low deformation resistance and excellent plastic deformation. The effective extrusion temperature category should be based on the plastic deformation diagram, work hardening diagram and phase diagram of brass plate, and taking into account the specific production and manufacturing conditions. Heating temperature is generally 0.75~0.95 times the melting point temperature of brass plate, can be based on the melting point of metal materials and brass plate and the solid phase point temperature of the component brass plate in the phase diagram, clear limit of extrusion temperature category, to prevent the thermal ductibility of extrusion molding. The low limit of extrusion temperature category should take into account the excellent plastic deformation of high temperature, and should also make the deformation resistance of metal materials and brass plate not too high.

2, the brass plate at high temperature has changed the brass plate, it is best to choose in the single-phase electric area to carry out cold extrusion. Cold extrusion should be carried out as far as possible within the range of high temperature plastic deformation zone to prevent transverse cracks. However, the surface characteristics of the brass plate at high temperature should be taken into account to avoid excessive air oxidation or bonding on the surface of the billet. The stickiness of some brass plates to special tools expands with the rise of temperature, such as white copper, aluminum bronze, etc., taking into account the selection of lower temperature extrusion molding as far as possible. In addition, when considering the extrusion temperature, we must also consider the working capacity of the continuous extruder. In the selection of lower extrusion temperature, large ton continuous extrusion machine should be used.

3, extrusion elbow shape variable is very large, deformation speed is faster, the friction between metal materials and special tools will cause a lot of heat, can cause the ingot temperature rise in the whole extrusion process. In the clear heating temperature, as far as possible to choose low temperature extrusion molding. In the different temperature to carry out extrusion molding, can get different physical properties, in the selection of extrusion temperature, should take into account the characteristics of the product provisions. Some brass plate in the higher temperature extrusion molding tail shrinkage is too long, pressure, such as HPB59-1, etc. When extrusion copper, the temperature is too low, extrusion product tail is very easy to produce strip mechanism.