Ti-6Al-2.5Mo-1.5Cr-0.5Fe-0.3Si

Ti-6Al-2.5Mo-1.5Cr-0.5Fe-0.3Si Features and Applications

Ti-6Al-2.5Mo-1.5Cr-0.5Fe-0.3Si titanium alloy, with good high temperature resistance, is suitable for the manufacture of aero-engine compressor discs and blades, as well as aircraft frames, joints and other load-bearing components and fasteners for different purposes . Strength levels may be greater than 980 MPa.

 

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Annealing Specifications for Ti-6Al-2.5Mo-1.5Cr-0.5Fe-0.3Si

Ingots for making Ti-6Al-2.5Mo-1.5Cr-0.5Fe-0.3Si bars and forgings should be smelted in vacuum consumable arc furnaces more than twice. The 0~2 grade small particle titanium sponge should be selected, the oxygen content should not be greater than 0.08%, the molybdenum content of the Al~Mo master alloy should be 50%, the silicon content of the Al-Si master alloy should be 10%, and the industrial grade should be selected. Iron wire or iron pellets.

Cutting

Ti-6Al-2.5Mo-1.5Cr-0.5Fe-0.3Si alloy can be machined smoothly. However, due to the low thermal conductivity of titanium alloys, less heat is taken away from the parts during cutting, which increases the temperature of the tool head and accelerates the wear of the tool; in addition, the shear angle is relatively large during cutting, and the unit area on the tool tip The increased pressure also promotes tool wear. Therefore, several points must be paid attention to in the cutting process: the cutting speed is low, which is 50% lower than that of ordinary steel; the cutting depth and cutting amount should be appropriately increased; the coolant should be fully used; the tool material and geometric parameters should be reasonably selected, and timely Change the tool.

Grinding

The Ti-6Al-2.5Mo-1.5Cr-0.5Fe-0.3Si alloy can be ground, but due to the strong grinding surface hardening and poor workability, it is easy to burn and crack, and the grinding wheel is easy to wear. The use of Q7S-1 cutting fluid improves the machinability and enables inner hole grinding. The surface roughness R value is 0.8μm.