Most of the  https://www.chaluminium.com/products/detail/seamless-aluminium-tube... seamless aluminium tubing on the market is produced by the conventional combined die welding and extrusion process, which can not completely avoid the welding line, especially the dark line after oxidation. In order to keep the temperature, tube diameter and extrusion time of the tube clean, it is necessary to control the temperature, tube diameter and extrusion time properly. Let's see what's the difference between the seamless aluminium tube And https://www.chaluminium.com/products/detail/extruded-aluminium-tube... extruded aluminium tube.Seamless Aluminum TubeThe seamless aluminum tube is generally used by piercing extrusion method because the seamless aluminum tube has the characteristics of small proportion, easy processing and high mechanical strength, in fact, the requirements of seamless aluminum tube production process are relatively strict and fine. But we should pay attention to some problems in the production, in order to produce a seamless aluminum tube with good quality.Large seamless aluminum tubes are generally formed by hot extrusion, and then after subsequent treatment. The small seamless aluminum tube can be hot extruded or cold stretched, and then after subsequent treatment. The alumina hydrate produced in the process of seamless aluminum tube production needs continuous extrusion, and it dehydrates violently in the extrusion process to form sand holes. In order to prevent sand holes on seamless aluminum tube, the round aluminum rod for extrusion shall not have rolling cracks; it shall not be stored in humid environment, the content of sodium hydroxide in cleaning solution shall be about 30%, and the content of aluminum ion in cleaning solution shall be strictly controlled.Extruded Aluminium TubeAt present, the aluminum tube extrusion press includes extrusion box and air cylinder. The heated aluminum block is put into the extrusion box from the feed port. The air cylinder starts to work, and the extrusion beam pushes the aluminum block to move towards the extrusion die. The aluminum block under high temperature has good plasticity. When the aluminum block temperature decreases, the plasticity will also decrease. Under the action of certain pressure and speed of the extrusion beam, the extrusion pad pushes the aluminum block to produce The plastic flow is extruded from the extrusion die to obtain the aluminum tube with the required cross-section shape and size;In the extrusion process, the aluminum block is in a strong pressure state in the extrusion deformation zone, which can give full play to its plasticity and obtain large deformation. At the same time, the extrusion deformation can improve the composition of metal materials In order to improve its mechanical properties, especially for the aluminum block with extrusion effect, the longitudinal (extrusion direction) mechanical properties of the extruded products after quenching and aging are much higher than those of similar products produced by other processing methods. Extrusion processing also has great flexibility. Only by changing the extrusion die, the products with different shapes, sizes and varieties can be produced on the same equipment, and it is more convenient The operation of changing extrusion die is simple, convenient, time-consuming and efficient. But for some double seamless aluminum tube forming, there are still great problems. Therefore, it is necessary to improve the situation.