The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 17, 2024
Filed:
May. 02, 2023
Institute of Metal Research Chinese Academy of Sciences, Liaoning, CN;
Dianzhong Li, Liaoning, CN;
Yikun Luan, Liaoning, CN;
Hongwei Liu, Liaoning, CN;
Paixian Fu, Liaoning, CN;
Xiaoqiang Hu, Liaoning, CN;
Pei Wang, Liaoning, CN;
Lijun Xia, Liaoning, CN;
Chaoyun Yang, Liaoning, CN;
Hanghang Liu, Liaoning, CN;
Yang Liu, Liaoning, CN;
Peng Liu, Liaoning, CN;
Yiyi Li, Liaoning, CN;
INSTITUTE OF METAL RESEARCH CHINESE ACADEMY OF SCIENCES, Shenyang, CN;
Abstract
A control process of inclusions in ultra-clean rare earth steel, wherein the content of rare earth elements REM in the ultra-clean rare earth steel, the total oxygen content T[O]m, the total sulfur content T[S]m in the steel, and the total oxygen content T[O]r in a rare earth metal or alloy added to the steel are controlled to satisfy the following formula: −500<REM−(m*T[O]m+n*T[O]r+k*T[S]m)<−30, where REM is the content of rare earth elements in the steel, in ppm; T[O]m is the total oxygen content in the steel, in ppm; T[O]r is the total oxygen content in a rare earth metal or alloy added to the steel, in ppm; T[S]m is the total sulfur content in the steel, in ppm; m is a first correction coefficient, with a value of 2-4.5;n is a second correction coefficient; and k is a third correction coefficient.