The application of the PVD coating on the insert needle is mainly reflected in the improvement of wear resistance, corrosion resistance and hardness of the insert needle, so as to extend its service life.
(1) improve wear resistance: PVD coating has high hardness and high wear resistance, can effectively prevent the pin in the use of the process of friction generated by the wear and tear, so as to extend its service life.
(2) enhance the corrosion resistance: PVD coating has good chemical stability, can resist a variety of corrosive media, to protect the mosaic needle from the erosion of chemical substances.
(3) reduce the coefficient of friction: the coating has a low coefficient of friction, reducing the friction resistance of the pin in the work, reducing the energy consumption, but also reduces the heat generated by friction, further protecting the pin.