- Posted: 2015-07-01
What is hot extrusion
Hot extrusion is a forming process used to create objects of a fixed, cross-sectional profile. A material is pushed or drawn through a die of the desired cross-section.
During hot extrusion, a round steel tube is pre-heated (at fairly high temperatures, approximately 50 to 75 % of the melting point of the metal) and, after leaving the furnace, is pushed through a forming die into a profile bar using a ram with an extrusion force of 2,200 ton. Hot extrusion can be used to make complex profile shapes even using metals which are difficult to form. In addition, small lot sizes can be produced economically.
The two main advantages of this process over other manufacturing processes are its ability to create very complex cross-sections and work materials that are brittle, because the material only encounters compressive and shear stresses. Besides, hot extrusion offers other benefits including:
Different material thicknesses within one profile cross-section
The possibility to use in highly sensitive areas, where the special profiles must withstand specific demands of temperature, pressure, aggressive media or hygienic requirements
Seamless structure of solid and hollow section