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Hard alloy material has high strength HRA92 above, cutting force is small, titanium alloys and high temperature alloy hardness is not high, when processing the springback is big, work hardening is serious, use the tap processing prone to tap to "lock" phenomenon, especially when the blade tap is easily broken, using thread milling processing, have space between the cutter and thread, there is no 'lock' tools, thermal deformation when processing small fit of the two kinds of material processing.Thread accuracy can be adjusted as required.apply on the following materials process, - Titanium alloy for aerospace: TC4, TC6, TC10, TC11; - Medical titanium alloy TA1, TA2, TA9, TB12, TB22 - High temperature alloy GH4169, GH3030, GH4145,GH2132, Gh3128 - Hardened steel, - Tungsten molybdenum alloy