Advanced cast aluminum alloys for automotive engine application with superior high-temperature properties

US11713500B2 · kind B2 · utility

Assignee

• Ford Global Technologies, LLC · US

Inventors

• Mei Li · Canton, US
• Jacob Wesley Zindel · Ann Arbor, US
• Larry Alan Godlewski · Fenton, US
• Bita Ghaffari · Ann Arbor, US
• Yang Huo · Changchun, CN
• Carlos Engler-Pinto · Dearborn, US
• Wei-Jen Lai · Keelung, TW

Key dates

• Filing date: Jul 30, 2020
• Grant date: Aug 1, 2023
• Expiry date: Oct 24, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22C21/04
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A process of heat treating an Al—Si—Cu—Mg—Fe—Zn—Mn—Sr-TMs alloy, where the TMs include Zr and V, includes heat treating the alloy to produce a microstructure having a matrix with Zr and V in solid solution after solidification. The solid solution Zr, in wt. %, is at least 0.16%, the solid solution V, in wt. %, is at least 0.20% after heat treatment, and Cu and Mg are dissolved into the matrix during the heat treatment and subsequently precipitated during the heat treatment. The composition of the alloy, in wt. %, includes Cu between 3.0-3.5%, Fe between 0-0.2%, Mg between 0.24-0.35%, Mn between 0-0.40%, Si between 6.5-8.0%, Sr between 0-0.025%, Ti between 0.05-0.2%, V between 0.20-0.35%, Zr between 0.2-0.4%, maximum 0.5% total of other alloying elements, and balance Al.