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:
Nov. 16, 1999
Filed:
Feb. 19, 1998
Applicant:
Inventors:
Anthony G Angilella, Richmond, IN (US);
Paul D Macy, Brownsville, IN (US);
Assignee:
Dana Corporation, Toledo, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21D / ; C22C / ; C22C / ;
U.S. Cl.
CPC ...
148321 ; 148612 ;
Abstract
An abrasion-resistant material is constructed from gray iron alloyed with 0.30 to 0.70% phosphorous. The high phosphorous cast iron alloy is heat treated for approximately 120 minutes to an austenitizing temperature of about 1600.degree. F. Next, the alloy is austempered for approximately 180 minutes at about 580.degree. F. The resulting abrasion-resistant structure is an acicular ferrite in stable austenite (ausferrite) with islands of a non-continuous, broken network of steadite of approximately 8 to 10% by volume, which has a material hardness of 280 to 330 BHN.