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. 02, 1978
Filed:
Feb. 25, 1972
Michael R Sargent, Cary, NC (US);
Robert G Schwartz, Raleigh, NC (US);
John G Brown, Jr, Raleigh, NC (US);
Monsanto Company, St. Louis, MO (US);
Abstract
A process is described whereby steel wire is made into killed twisted strand or cord having essentially no retained tensile, bending or torsional stresses which comprises twisting a plurality of steel wires to form a strand or cord, austenitizing and simultaneously homogenizing the alloy, quenching the homogenized steel strand or cord along a straight path during martensitic transformation to provide a quenched martensitic structure, essentially to the exclusion of retained austenite and, thereafter, tempering the quenched martensite to provide optimum strength and ductility. The twisted strand or cord resulting from the mechanical and heat treatment possesses nearly optimized strength properties of the alloy employed, while having no retained tensile, bending or torsional stresses and is suitable for application in steel reinforced composite and in particular as tire cord.