2062-Small diameter T-shaped milling cutter rod T-shaped groove milling cutter groove milling cutter inner hole groove milling cutter large cutting deep groove cutter 05GR 07GRSmall diameter T shaped milling cutter rod T shaped groove milling cutter groove milling cutter inner hole groove milling cutter large cutting deep groove cutter 05GR 07GR 1. The overall tool is made of 42CRMNTI alloy steel with obvious seismic effect, which can effectively suppress vibration and improve seismic strength 2. Focusing on the three major factors of corrosion, wear, friction and other three factors, the research of new process upgrading