A Study Of Refractory Metal (γ-titanium Aluminide) Deep-hole Drilling Technology

Titanium aluminide is a new intermetallic structural material, γ-titanium aluminide alloy has the advantages of high temperature resistance, high performance of anti-oxidation effect, low-density, high specific strength and rigidity etc. Now titanium aluminide has used in automobile and aircraft industry and is promising to be explored as a potential material of aerospace, shipbuilding, medicine, chemical and metallurgical industry. Titanium aluminide alloy is a difficult-to-machine material. The ripe cutting tool material and geometric parameters have not been found out. All of these factors will choke off the development of titanium aluminide.Deep-hole drilling is more difficult than the other processing. So there is a few works in researching deep-hole drilling y-titanium aluminide and data is lack.The difficult-to-cut material y-titanium aluminide was taken as subject to study the deep-hole drilling technology. At first, we have analyzed the cutting performance of y-titanium aluminide and designed a φ12mm BTA deep-hole drills with appropriate geometric parameters. After that, we have chosen YG8cemented carbide, YG813cemented carbide and YW2cemented carbide as the cutting tool materials by the contrast analysis on the performance of common cutting tool materials. Then we can find out the appropriate tool material by drilling experimental. At last we have study the effect of cutting dosage on drilling force.The research results are help for improving the machinability of y-titanium aluminide. The study can promote application of titanium aluminide in the industry.