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:
Aug. 11, 2009
Filed:
Dec. 25, 2003
Hajime Ichimura, Tochigi, JP;
Masanori Imasaki, Tochigi, JP;
Tetsuro Aoki, Tochigi, JP;
Kunihiro Masuo, Gunma, JP;
Hajime Ichimura, Tochigi, JP;
Masanori Imasaki, Tochigi, JP;
Tetsuro Aoki, Tochigi, JP;
Kunihiro Masuo, Gunma, JP;
Kiriu Corporation, Kiryu-shi, JP;
Abstract
There is provided a method for quantitatively evaluating properties of a graphite structure of a gray cast iron based on a number and a thick and thin degree of graphite components in the structure. In particular, only non-spherical graphite pieces having an average size of 5 μm or more are extracted from a preprocessed image of the graphite structure, and counted (Step Sof FIG.). Further, only graphite pieces having a maximum length of 50 μm or more and less than 150 μm are selected therefrom, and a length and an area of each selected graphite piece are measured (Step S). An area of an assumptive representative graphite piece having a maximum length (a maximum size) of 100 μm is calculated from these data, and divided by the length 100 μm, to obtain the thick and thin degree (Step S). The thick and thin degree is shown with the number of the graphite pieces (Step S).