Hard alloy blade for broaching narrow groove of wheel disc

The invention discloses a hard alloy blade for broaching a narrow groove of a wheel disc. The hard alloy blade comprises a blade head and a blade seat which are integrally formed, the blade head is provided with a blade cutting edge used for cutting, and the blade seat is provided with a positioning groove used for mounting and positioning the blade; the main relief angle alpha of the blade is 25+/-0.1 degrees, the side cutting edge angle beta is 4+/-0.1 degrees, the side relief angle gamma is 3+/-0.1 degrees, and the fillet radius R1 of a tool nose of the blade is 0.4+/-0.01 mm. The hard alloy blade for broaching the narrow groove of the wheel disc can be used in cooperation with a narrow groove broach body, the requirement for the strength of the broach blade is met, and the requirement for efficient broaching of the narrow groove of a gas turbine can also be met. 本发明公开了一种用于轮盘窄槽拉削硬质合金刀片，包括一体成型的刀片头部和刀片座，所述刀片头部设置用于切削的刀片刃口，所述刀片座设置用于刀片安装定位的定位槽；所述刀片的主后角α为25±0.1°，侧刃角β为4±0.1°，侧后角γ为3±0.1°，刀片的刀尖圆角半径R1为0.4±0.01mm。采用本