Extruded Titanium Tubing

Extruded Titanium Tubing Including cold rolled pipe, spinning pipe, drawing pipe. The vast majority of extruded titanium products belong to the billet of cold rolled tubes, but also include some hot extruded tubes, profiles, profiles and composite materials as finished products. The minimum specification of the pipe is 2mmx0.5mm in diameter, and the maximum length of high-precision ultra-long pure titanium seamless pipe can be up to 15 m. There are two ways to prepare titanium pipe billets: one is the drilling/piercing process, which has a large metal loss, but the wall thickness of the billet is uniform; the other is the diagonal rolled and pierced process, which has a small metal consumption, but the thickness of billet with larger tolerances. Hot extrusion of titanium plates and alloys is carried out using an extruder. The use of glass lubrication extrusion, the extrusion ratio can be larger than the jacket extrusion, glass lubrication of titanium alloy profiles P-phase zone extrusion, the maximum extrusion ratio of up to 150. generally use a medium speed (50 ~ 120mm / s) extrusion. Titanium extrusion ratio is generally less than 30, TC4 titanium alloy extrusion ratio. The lubricants used are mainly grease, glass lubricant and metal-coated three types. Glass lubrication extrusion is currently the world's most advanced lubrication process, but China's titanium tubing glass lubrication extrusion has not yet reached the level of industrial application, titanium alloy profile glass lubrication extrusion has made a breakthrough. Cladding lubrication is to cover copper, soft steel or other metals on the outside of the billet. Metal cladding extrusion process is complex, high cost, acid washing process of environmental pollution is serious. Extrusion dies are generally preheated to 300-400 degrees Celsius. Under normal circumstances, the service life of each pair of BE dies is about 20 times. For profile extrusion, in order to improve the dimensional accuracy of thin-walled profiles and the wear resistance of the moulds, the moulds must be coated with zirconium dioxide by plasma method. In a single specification, batch size, the use of oblique rolling and piercing method of production of billets can get better technical and economic results. There are two types of perforation methods: two-roll perforation and three-roll perforation.