Material Group - Titanium and Ti alloys
Titanium based alloys:
Due to their high strength to weight ratio and excellent corrosion resistance, Titanium alloys parts are ideally suited for advanced aerospace systems. Titanium based alloys which contain 86-99.5% Ti and 5-8% Al, are immune to almost every medium to which they would be exposed in an aerospace environment.
Today, Titanium is used extensively in commercial and military applications and to some extent in space. The primary areas of application for aircrafts are landing gear, landing-gear support structures, wing structures, vertical wing-actuation structures, engines, floor beams and seat-track architecture.
Very large usages of titanium can be found in jet engines, where titanium alloys parts make up to 25-30% of the weight, primarily in the compressor. The high efficiency of these engines is received through the use of titanium alloy components like fan blades, compressor blades, rotors, discs, hubs and other non-rotor parts like inlet guide vanes.Despite its higher cost relative to competing materials, primarily aluminum alloys and steels, the demand for titanium is projected to grow by at least 40-50% over the next few years. Titanium’s superior properties and light weight allow aeronautical engineers to design planes that can fly higher and faster with high resistance to extreme environmental conditions.
Titanium, has historically been perceived as a material which is difficult to machine.
The machining difficulties are the result of the physical, chemical and mechanical properties of the metal.
The material’s relatively high temperature resistance along with its low thermal conductivity does not allow generated heat to dissipate from the cutting tool. This causes excessive tool deformation and wear. Titanium alloys retain their strength at high temperatures causing relatively high plastic deformation of the cutting tool resulting in depth of cut notches.
During machining, the high chemical reactivity of titanium alloys causes the welding of the chips to the cutting tool leading to Built-up cutting edges and chip breakage problems.
Over the past few years, ISCAR has invested a lot in R&D in order to investigate the machining of Titanium alloys. Our special improved cutting tools along with our unique grades have places ISCAR as a leading company in the area of machining titanium.
In addition to our standard pressure cooling solutions, the growing demands for high pressure machining solutions especially in the aerospace market, has led ISCAR to develop unique product lines suitable for high pressure cooling systems.
When machining Titanium alloys with standard pressure coolant, the recommended cutting speed is 60-70 m/min. The use of high pressure cooling system enables to increase the cutting speeds by 100-150% and significantly increase the productivity.
For more information contact: Industrealize@iscar.co.il