| 摘要 |
The invention provides a making method for surface coating cutting tool with excellent wear resistance property. At least top surface of a tool body is coated with film of 0.05-5um and is provided with an alumina layer of [alpha] alumina composition with corundum crystal structure, and the alumina layer is formed by following sol-gel method: adding ethanol in aluminum alkoxide (preferably selecting ethanol with [alpha]alumina particle of 10-300um ), further adding acid (for example diluted hydrochloric acid), stirring and generating sol under temperature lower than 10 DEG C, adding water in the sol so that molar ratio between aluminum and water contained in the sol becomes 1:30-1:150, carrying out high crystallization process of heating and stirring under 15-80 DEG C, coating the highly crystallized sol on the surface of the tool body or on a top surface of a hard film formed on the surface of the tool body, repeatly carrying out drying process more than once under 100-400 DEG C, and finally carrying out burning process in a temperature scope of 500-1000 DEG C. |
