The invention discloses a method for preparing an
amorphous carbon coating on the surface of a medical stainless steel knife saw. The method includes the following steps: preprocessing,
ion cleaning,
electric arc discharging, and
carbon ion depositing. An amorphous tetrahedral
carbon film prepared by the method has the characteristics of high
bonding strength, excellent
biological property and good
corrosion resisting performance; after a salt
fog test for 48 hours, no
corrosion spot is incurred on the amorphous tetrahedral
carbon film. After the surfaces of resin, stainless steel and the like are coated, the
corrosion and abrasion resisting properties are greatly enhanced, the anti-
ageing function is obvious, and the service life is greatly prolonged. After the above surfaces are coated, material
bacteria cannot be adhered, so as to solve the cleaning problem of an
oral cavity after artificial teeth are installed, thereby being beneficial for the health of the
oral cavity. After the above surfaces are coated, the growth of cells on the surfaces is in good condition, and the
cell density is higher; moreover, the thicker the film, the better the growth of the cells. The
coating stainless steel knife saw prepared by the method in the invention has the following characteristics: the rigidity of the knife saw can be up to more than 85GPa, the content of an SP3 bond structure of a
coating is equal to or higher than 85%, the
friction coefficient is within 0.08 to 0.15, and the
binding force between the film and a
basal body is within 35 to 45N.