Preparation process of a self-lubricating ceramic material cutting tool

Abstract

The invention relates to the technical field of cutting tools, in particular to a preparation process of self-lubricating ceramic material cutting tools, which is characterized in that the process steps are: (1) Nano-thulium zirconium ceramic powder prepared by hydrothermal precipitation method, its composition The content and mass percentage are: 7% to 38% of thulium oxide, 62% to 93% of zirconia, (2) after adding TiC composite, ball milling, (3) adding solid lubricant, the radius of the solid lubricant particle ceramic composite material The ratio is 0.225≤r/R≤0.419, (4) mixed after ball milling, (5) vacuum dried, (6) put into graphite mold, (7) prepared by hot pressing sintering process, and the sintering temperature is 1500°C-1700°C , holding time 40 minutes. Compared with the prior art, the present invention has a simple technological process, and the self-lubricating ceramic tool has the functions of anti-friction, anti-wear and lubrication, saves the cooling and lubrication system, reduces equipment investment, avoids environmental pollution caused by cutting fluid, and realizes clean production. reduce manufacturing cost.

Description

[technical field] [0001] The invention relates to the technical field of cutting tools, in particular to a preparation process of self-lubricating ceramic material cutting tools. [Background technique] [0002] During the cutting process, the front and flank surfaces of the tool are constantly in contact with chips and the workpiece, and violent friction occurs, and the contact area is in a state of high temperature and high pressure. The friction and wear on the tool will cause damage to the tool and make it impossible to cut; the severe friction on the workpiece will deteriorate the quality of the machined surface. In order to reduce the friction and wear during cutting, the method commonly used at present is to use cutting fluid with lubricating effect in cutting. The main function of cutting fluid is to improve the friction and lubrication state of the cutting process, reduce the cutting temperature, thereby prolonging the life of the tool and improving the surface qual...

AI Technical Summary

Problems solved by technology

The main function of cutting fluid is to improve the friction and lubrication state of the cutting process, reduce the cutting temperature, thereby prolonging the life of the tool and improving the surface quality of the workpiece. However, under the high temperature of cutting (especially high-speed cutting), the use of cutting fluid lubrication has the following problems: ①Under the action of cutting high temperature, it is difficult for the additives in the cutting fluid to interact with the surface of the tool to form a sufficient boundary film: ②As the cutting temperature increases, the viscosity of the cutting fluid decreases exponentially, and the cutting pressure , it is easy to cause direct contact with asperities; ③The liquid lubrication performance is prone to attenuation in high temperature environments. Therefore, for high-speed cutting and other high-temperature cutting processing occasions, the traditional cutting fluid anti-friction lubrication method has been difficult to meet the processing requirements