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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.:

US 11655514 B1

PDFFull Text
Date of Patent:
May. 23, 2023

Filed:

Oct. 25, 2021

Deeply-hardened-surface turnout rail with high degree of undercooling and the preparation method thereof

Applicant:

Pangang Group Panzhihua Iron & Steel Research Institute Co., Ltd., Panzhihua, CN;

Inventors:

Jun Yuan, Panzhihua, CN;

Ming Zou, Panzhihua, CN;

Yong Deng, Panzhihua, CN;

Ruoxi Li, Panzhihua, CN;

Assignee:

PANGANG GROUP PANZHIHUA IRON & STEEL RESEARCH INSTITUTE CO., LTD., Panzhihua, CN;

Attorney:

Caesar Rivise, PC

Primary Examiner:

Anthony M Liang

Int. Cl.
CPC ...
C21D 9/04 (2006.01); C22C 38/24 (2006.01); C22C 38/04 (2006.01); C22C 38/02 (2006.01); C22C 38/00 (2006.01); C21D 8/00 (2006.01); C21D 6/00 (2006.01);
U.S. Cl.
CPC ...
C21D 9/04 (2013.01); C21D 6/002 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 8/005 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/24 (2013.01); C21D 2211/001 (2013.01);
Abstract

The invention relates to a turnout rail production technology, in particular to a deeply-hardened-surface turnout rail with high degree of undercooling and the preparation method thereof. The invention aims to solve the technical problem by providing a deeply-hardened-surface turnout rail with high degree of undercooling featured in even hardness distribution and a deeply hardened surface layer and the preparation method thereof. The method is described as follows: feeding molten iron for converter smelting→furnace rear argon blowing station→LF refining→RH vacuumization→casting steel blanks→slow cooling in the slow cooling pit→austenitic homogenization→rail rolling→heat treatment; in the converter smelting process, adding 0.2-0.3% Cr, 0.04-0.06 V and 0.75-0.80% C; the heat treatment process is divided into two cooling stages. The turnout rail prepared with the method described in the invention has a deeper deeply-hardened surface layer; the hardness is distributed more evenly, the anti-contact fatigue performance is higher and the resistance to wearing is ideal.

Find Patent Forward Citations

Yuan, Jun. (2023). Deeply-hardened-surface turnout rail with high degree of undercooling and the preparation method thereof (U.S. Patent No. 11655514). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/11655514

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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