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:
May. 11, 1993
Filed:
Apr. 07, 1992
Gordon O Besch, Lenexa, KS (US);
John A Hovland, Overland Park, KS (US);
Jun Furukawa, Yokohama, JP;
Hideyuki Yamanaka, Hiroshima, JP;
Kozo Fukuda, Miyagi, JP;
Tomoo Horita, Hiroshima, JP;
Yuzuru Kataoka, Hiroshima, JP;
Masahiro Ueda, Hiroshima, JP;
Tetsunari Ide, Hiroshima, JP;
Atsushi Ito, Yokohama, JP;
Takao Gino, Kanagawa, JP;
NKK Corporation, Fort Worth, JP;
Burlington Northern Railroad Company, Fort Worth, TX (US);
Abstract
A high-strength, damage-resistant rail characterized by essentially consists of 0.60 to 0.85 wt. % of C, 0.1 to 1.0 wt. % of Si, 0.5 to 1.5 wt. % of Mn, not more than 0.035 wt. % of P, not more than 0.040 wt. % of S, and not more than 0.05 wt. % of Al, a balance being Fe and indispensable impurity. The rail comprises corner and head side portions having a Brinell hardness H.sub.B of 341 to 405 and a head top portion having a hardness which is not more than 0.9 of the Brinell hardness of the corner and head side portions.