Method for manufacturing vehicle brake disc
A brake disc manufactured by a method of manufacturing a brake disc according to the present invention includes a carbon fiber Cf, silicon Si, silicon carbide Sic, and a silicon-copper alloy Si x Cu y . The carbon fiber Cf, silicon Si, carbon C, and silicon carbide SiC make a disc light and provide high thermal shock resistance, anti-oxidation, wear resistance, strength, and friction coefficient. The copper Cu and silicon-copper alloy Si x Cu y increase heat capacity at constant volume of a disc, so a large increase in temperature of the disc is prevented and a changing range of the friction coefficient is reduced in braking. Accordingly, the brake disc according to the present invention has all of the advantage of a brake disc made of a carbon fiber-reinforced ceramic composites without thermal deformation and deterioration of a pad, a hat part, and a caliper.
1. A method of manufacturing a vehicle brake disc, comprising:
a first step of making a first mixture by mixing a carbon fiber and phenolic resin and making a second mixture by mixing another carbon fiber and phenolic resin;
a second step of making a first green body by pressing the first mixture in a mold with a press and making a second green body by pressing the second mixture in the mold with a press;
a third step of making a first carbonized body by carbonizing the first green body and making a second carbonized body by carbonizing the second green body;
a fourth step of machining the first carbonized body and the second carbonized body;
a fifth step of bonding the machined first carbonized body and second carbonized body to each other;
a sixth step of putting mixture powder made by mixing only silicon powder and copper powder at a ratio of silicon powder 6 to copper powder 4 wt % over and under the bonded machined first and second carbonized bodies;
a seventh step of making carbon fiber-reinforced ceramic composites by melting and infiltrating the mixture powder into the bonded machined first and second carbonized bodies; and
an eighth step of grinding the carbon fiber-reinforced ceramic composites,
wherein the ratio of silicon powder 6 to copper powder 4 wt % of the silicon powder and the copper powder is to increase density of the vehicle brake disc by copper of the copper powder and simultaneously to impregnate the copper powder into the bonded machined first and second carbonized bodies well when processing the seventh step.
2. A method of manufacturing a brake disc, comprising:
a first step of making a first mixture by mixing a carbon fiber and phenolic resin and making a second mixture by mixing another carbon fiber and phenolic resin;
a second step of making a first green body by pressing the first mixture in a mold with a press and making a second green body by pressing the second mixture in the mold with a press;
a third step of making a first carbonized body by carbonizing the first green body and making a second carbonized body by carbonizing the second green body;
a fourth step of machining the first carbonized body and the second carbonized body;
a fifth step of bonding the machined first carbonized body and second carbonized body to each other;
a sixth step of putting mixture powder made by mixing only silicon powder and copper powder at a ratio of silicon powder 6 to copper powder 4 wt % over and under the bonded machined first and second carbonized bodies and putting a weight on the mixture powder over the bonded machined first and second carbonized bodies;
a seventh step of making carbon fiber-reinforced ceramic composites by melting and infiltrating the mixture powder into the bonded machined first and second carbonized bodies; and
an eighth step of grinding the carbon fiber-reinforced ceramic composites,
wherein the sixth step of putting mixture powder made by mixing only silicon powder and copper powder at a ratio of silicon powder 6 to copper powder 4 wt % is to increase density of the vehicle brake disc by copper Cu and simultaneously to impregnate the copper powder into the bonded first and second carbonized bodies well when processing the seventh step.