由于挤压工艺能显著提高金属的可塑性、增大加工过程的变形程度和改善机械性能,并具有加工过程简捷、制品沿模子断面的尺寸精度高等优点,巳广泛用于有色金属及其合金的管材、棒材和型材;各种截面形状复杂或品种规格经常改变的型材;压延方法或热轧法所不能制造的薄壁管件和型材等的加工。而且随着科学技术的发展,目前又已用到特种合金钢材和稀有金属的加工中去。 As the extrusion process can significantly improve the plasticity of the metal, increase the deformation of the process and improve the mechanical properties, and has the advantages of simple processing, high dimensional accuracy of the product along the mold section, has been widely used in non-ferrous metals and their alloys , Bars and profiles; various sections of complex shapes or varieties often change the profile; rolling method or hot-rolled method can not manufacture thin-walled tubes and profiles and other processing. And with the development of science and technology, at present, special alloy steel and rare metal are used in the processing.