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:
Jan. 12, 1988
Filed:
Oct. 18, 1984
Nippon Steel Corporation, Tokyo, JP;
Abstract
In order to evaluate the mechanical properties of steel, empirical equations showing the relationship between each of the tensile strength, yield point and elongation of steel and its hardness, grain size and chemical composition are determined in advance based on experimental results. Then, the hardness, grain size and chemical composition of the steel to be evaluated are determined. The tensile strength, yield point and elongation of the steel to be evaluated are determined by inserting the determined hardness, grain size and chemical composition in the empirical equations. In determining the energy absorbed according to a method of this invention, empirical equations showing the relationship between each of the shelf energy, transition temperature and temperature range of the energy transition region of steel and its hardness, grain size and chemical composition are determined in advance. Then, the hardness, grain size and chemical composition of the steel to be evaluated are determined. The shelf energy, transition temperature and temperature range of the energy transition region of the steel to be evaluated are then derived by inserting the determined hardness, grain size and chemical composition in the empirical equations. Finally, the energy absorbed at a given temperature is derived from the shelf energy, transition temperature and temperature range of the energy transition region thus determined.