Patent ID: 9562578
Date: 2017-02-07
CPC Classifications: B22D,F16D

Claim:
1. A method of manufacturing a brake disc comprising heterogeneous or different materials, comprising steps of: a step of casting a gray cast iron friction part, in which N is a number of bridges formed from an internal surface of the friction part toward a center coupling hole and is determined by an Equation below; a step of pre heating the friction part; a mounting step of inserting the pre-heated friction part in a lower part of a mold; a casting step of coupling an upper part of the mold to the lower part of the mold, and injecting a molten aluminum alloy which is a raw material of a hat part; and a completion step of releasing and post-processing after the molten aluminum alloy is coagulated or solidified, wherein T is a maximum braking torque, f