Production process of ceramic ball bearing
A technology for bearing production and production technology, applied in the field of ceramic ball bearing production technology, can solve the problems of low processing efficiency and low grinding precision, and achieve the effects of high processing efficiency, reduction of internal defects and high rotational speed
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Embodiment 1
[0021] A ceramic ball bearing production process is characterized in that its production process is as follows:
[0022] (1) Silicon nitride powder compounding process: the composition of ceramic powder is β-Si 3 N 4 : 65%, SiC whiskers: 10%, sintering aid 5%, the powder is mixed by the liquid phase mixing process combining graded mixing and ultrasonic dispersion, wherein the dispersion medium is absolute ethanol, and the dispersion aid is polyethylene glycol , the addition amount is 1.0wt%, wherein graded mixing is to pre-mix several components with lower content to prepare a mixed solution, and then mix the main components with the mixed solution;
[0023] (2) Ceramic blank ball forming process: put the above silicon nitride powder into the mold, and press it into a spherical shape by cold isostatic pressing;
[0024] (3) Ceramic blank sintering process: Sinter ceramic blank balls in sintering aids at a temperature of 1700°C and a pressure of 2 MPa. While sintering, cerami...
Embodiment 2
[0030] A ceramic ball bearing production process is characterized in that its production process is as follows:
[0031] (1) Silicon nitride powder compounding process: the composition of ceramic powder is β-Si 3 N 4 : 67%, SiC whiskers: 15%, sintering aid 7%, the powder is mixed by the liquid phase mixing process combining graded mixing and ultrasonic dispersion, in which the dispersion medium is absolute ethanol, and the dispersion aid is polyethylene glycol , the addition amount is 1.5wt%, wherein graded mixing is to pre-mix several components with lower content to prepare a mixed solution, and then mix the main components with the mixed solution;
[0032] (2) Ceramic blank ball forming process: put the above silicon nitride powder into the mold, and press it into a spherical shape by cold isostatic pressing;
[0033] (3) Ceramic blank sintering process: Sinter ceramic blank balls in sintering aids at a sintering temperature of 1800°C and a pressure of 5 MPa. While sinter...
Embodiment 3
[0039] A ceramic ball bearing production process is characterized in that its production process is as follows:
[0040](1) Silicon nitride powder compounding process: the composition of ceramic powder is β-Si 3 N 4 : 68%, SiC whiskers: 25%, sintering aid 7%, the powder is mixed by a liquid phase mixing process combining graded mixing and ultrasonic dispersion, in which the dispersion medium is absolute ethanol, and the dispersion aid is polyethylene glycol , the addition amount is 2.0wt%, wherein graded mixing is to pre-mix several components with lower content to prepare a mixed solution, and then mix the main components with the mixed solution;
[0041] (2) Ceramic blank ball forming process: put the above silicon nitride powder into the mold, and press it into a spherical shape by cold isostatic pressing;
[0042] (3) Ceramic blank sintering process: Sinter ceramic blank balls in sintering aids at a temperature of 2000°C and a pressure of 10 MPa. While sintering, ceramic...
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