Grain refinement in iron-based materials

US10465258B2 · kind B2 · utility

Assignee

• The Curators of the University of Missouri · US

Inventors

• Simon Lekakh · Rolla, US
• Von L. Richards · Murrysville, US
• Ronald O'Malley · Rolla, US
• Jun Ge · Nanhu, CN

Key dates

• Filing date: Apr 18, 2016
• Grant date: Nov 5, 2019
• Expiry date: Oct 11, 2036

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22C38/44
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A process for manufacturing an iron-based alloy comprising forming targeted fine oxide and/or carbide dispersoids in a melt, and sequentially precipitating transition-metal nitrides on the dispersoids for heterogeneous nucleation of equiaxed grains. An iron-based cast alloy having a highly equiaxed fine grain structure.