Preparation method of sodium disilicate compound, and application of compound in bearing materials

Abstract

The invention discloses a preparation method of a sodium disilicate compound. The preparation method comprises the following steps: mixing sodium carbonate and quartz powder for 15-20 min, performinguniform stirring, and then transferring the obtained mixture into a muffle furnace; raising the furnace temperature from room temperature to 300 DEG C in 2 h, keeping the temperature for 1 h, raisingthe temperature to 700 DEG C in 6 h, keeping the temperature for 8 h, raising the temperature to 900 DEG C in 4 h, and keeping the temperature for 4 h; lowering the temperature to normal temperature within 4 h; taking out the obtained material, and coarsely grinding the material to a particle diameter of below 1 cm; adding kaolin, bentonite and talcum to the coarsely ground material, ball-millingthe obtained mixture for 10-20 h, and calcining the ball-milled mixture at 700-800 DEG C for 1 h to obtain the sodium disilicate compound. The sodium disilicate compound prepared by the method of theinvention is inexpensive, and is suitable for being used in nonmetallic bearing materials.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a preparation method of a sodium disilicate compound and its application in bearing materials, especially the application in non-metallic bearing materials. Background technique [0002] Bearings are an important part of contemporary mechanical equipment. Its main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy. Bearings generally use JIS steel SUJ2. SUJ3 is used for large bearings. In the case where impact resistance is further required, chrome steel, chrome-molybdenum steel, and nickel-chromium-molybdenum steel are used as bearing materials, and carburizing and quenching are used to make the steel have a hardened layer from the surface to an appropriate depth. Carburized bearings with appropriate hardening depth, fine structure, suitable surface hardness and core hardness...

AI Technical Summary

Problems solved by technology

[0004] When choosing polymers as bearing materials, the following issues must be paid attention to: Since the thermal conductivity of polymers is only a few percent of that of steel, the dissipation of frictional heat must be considered, which strictly limits the working speed and speed of polymer bearings. Pressure value

The copper powder metallurgy structure has relatively low strength, it is difficult to adapt to high-load working conditions, and it is easy to cause strain during the running-in period

Existing bearing materials need to add molybdenum disulfide etc. as wear-resistant phase, otherwise they cannot be used

However, molybdenum disulfide also has its disadvantages, such as poor thermal conductivity, low friction coefficient, not strong penetration ability (compared with thin oil), etc. These shortcomings are the main obstacles to further expand the scope of use.

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