Method for judging graphite texture in gray cast iron, judging program recording medium and judging system
US7574034B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 25, 2003 |
| Grant date | Aug 11, 2009 |
| Priority date | — |
| Expiry date | May 3, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30136
- WIPO fieldMeasurement
- WIPO sectorInstruments
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 S5 of FIG. 3). 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 S6). 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 S7). The thick and thin degree is shown with the number of the graphite pieces (Step S8).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.