Patent ID: 6321885
Filing Date: 2001-11-27
Classification: B22D,F16D

Abstract:
A composite casting process for the production of brake elements comprising a hub and a flange for fastening to a vehicle wheel, and brake body component bearing a friction surface for interaction with brake jaws for braking, the brake body component being made of a first cast iron material having lamellar graphite with a high resistance to thermal shocks, and the hub and the flange being made of a second cast iron material with a higher-grade tensile strength greater than the tensile strength of the first cast iron material, the process comprising the following steps:inserting a cast iron material solid body, which is cooling or heating, into a mold cavity,coating a portion of the solid body located in the mold cavity where a material union is to be formed with a non-metallic mixture of a reducing compound containing boron, which protects against oxidation,casting a melt of the second cast iron into the mold cavity, andproviding a temperature at the contact surface between the two materials that is at least for more than one second 10.degree. C. above the solidus temperature of the cast iron material of the solid body to form a juncture between the cast iron materials, thereby connecting the brake body component to the hub by forming a material union between the hub and the brake body component.