Composite brake drum

US12366273B2 · kind B2 · utility

Assignee

• GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventors

• Heewook Lee · Oakland Charter Township, US
• Zhongyi Liu · Troy, US
• Anil K. Sachdev · Rochester Hills, US
• Tyson W. Brown · Royal Oak, US
• Ratandeep Singh Kukreja · Warren, US

Key dates

• Filing date: Dec 22, 2022
• Grant date: Jul 22, 2025
• Expiry date: Mar 1, 2044

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16D2250/0046
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A brake drum having a composite structure includes a cylindrical body defining an inner friction surface and an outer surface. The cylindrical body includes a drum core comprising an Al—Si alloy, the drum core including an inner surface, and an outer surface of the drum core defining the outer surface of cylindrical body. The cylindrical body includes a thermal barrier layer comprising a thermally insulating material on the inner surface of the drum core, and a wear-resistant layer comprising an Fe—Al—Si—Zr alloy on the inner surface of the drum core over the thermal barrier layer, the wear-resistant layer defining the inner friction surface of the cylindrical body.