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Amorphous alloy member, process for manufacturing amorphous alloy member, authenticity determining device and method

A manufacturing process and amorphous technology, applied in the field of amorphous alloy components, can solve the problems of reducing authenticity judgment ability and pattern change

Active Publication Date: 2008-04-02
FUJIFILM BUSINESS INNOVATION CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In these techniques, when judging the authenticity of a medium on which a pattern is formed, usually, by storing in advance information indicating characteristics of a pattern formed on each medium, the data on the medium to be judged is read out. Pattern feature information, and determine whether there is feature information consistent with the read-out result in the feature information stored in advance for each medium to determine authenticity, but there is the following problem: the pattern change caused by the wear of each medium will Reduce the ability to judge authenticity
[0006] In addition, in the above-mentioned authenticity determination method, the manufacturer or medium supplier must read and store information unique to each medium in advance for each medium, even if the configuration does not identify a single medium but is only used to determine the authenticity of each medium. In pseudo-systems, the manufacturer or media supplier must still pre-reserve specific information based on the quantity of each media to be distributed

Method used

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  • Amorphous alloy member, process for manufacturing amorphous alloy member, authenticity determining device and method
  • Amorphous alloy member, process for manufacturing amorphous alloy member, authenticity determining device and method
  • Amorphous alloy member, process for manufacturing amorphous alloy member, authenticity determining device and method

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example 1

[0317] [production of mold]

[0318] A casting mold 20 composed of SDK 61 having a shape shown in FIG. 2A was prepared as a casting mold.

[0319] Next, the concave portion 24 of the casting mold 20 was subjected to a discharge treatment to form a region 24A having an irregular shape of 40 mm×20 mm. When the centerline average roughness Ra of this irregularly shaped region 24A was measured, the centerline average roughness Ra was 3.0 μm.

[0320] FIG. 12A shows an image obtained by photographing an irregularly shaped region 24A of the manufactured casting mold 20 at a magnification of 100 using a metal microscope.

[0321] Then, in the pouring step, after the second mold 26 is superimposed on the casting mold 20 having the irregularly shaped region 24A so that the concave portion 24 of the casting mold 20 and the communication hole 49 as the concave portion of the second mold 26 face each other, The casting mold 20 and the second mold 26 are clamped.

[0322] As this second...

example 2

[0357] An amorphous alloy member having irregular regions formed thereon was manufactured in the same manner as in Example 1, except that in Example 2, by melting at 1400° C. 44 Ni 28 Si 4 B 20 Nb 4 Alloys (as having the chemical formula (1) M 100-n tm n alloy of this composition) to prepare a molten metal as an amorphous alloy constituting an amorphous alloy member;

[0358] Using an X-ray diffraction apparatus, the volume ratio of the amorphous phase of the amorphous alloy member produced in Example 2 was measured by the area ratio of the X-ray diffraction profile between the crystal phase and the amorphous phase, and it was found that the The volume ratio is 100%.

example 3

[0360]An amorphous alloy member having irregular regions formed thereon was manufactured in the same manner as in Example 1, except that in Example 3, by melting at 1200° C. 60 Ti 10 Zr 30 Alloy (which as having the chemical formula (2) Cu p Ti q M1 100-p-q alloy of this composition) to prepare a molten metal as an amorphous alloy constituting an amorphous alloy member;

[0361] Using an X-ray diffraction apparatus, the volume ratio of the amorphous phase of the amorphous alloy member produced in Example 3 was measured by the area ratio of the X-ray diffraction profile between the crystal phase and the amorphous phase, and it was found that the The volume ratio is 100%.

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Abstract

An amorphous alloy member including an irregular region having a center line average roughness Ra of 0.1 µm to 1000 µm on a surface, at least the irregular region including an amorphous alloy having an amorphous phase at a volume ratio of 50% to 100%. A process for manufacturing the amorphous alloy member, and an authenticity determination device and an authenticity determination method using the amorphous alloy member.

Description

technical field [0001] The present invention relates to an amorphous alloy component, a device for judging authenticity, a method for judging authenticity, and a manufacturing process for an amorphous alloy component, and more particularly relates to an amorphous alloy component applicable to judging authenticity, the amorphous A manufacturing process of an alloy component, an authenticity judging device and a authenticity judging method using the amorphous alloy component. Background technique [0002] As a technique for preventing falsification of paper documents (such as securities, various title certificates, insurance policies, residence certificates, birth certificates, written guarantees, passports, banknotes, confidential documents, etc.) and ID cards, etc., the following methods are known : When printing the identification symbol, use advanced printing technology or special ink that is difficult to obtain, so that it is difficult to forge the identification symbol. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B44F1/12D21H21/40G09F3/02G07D7/00C22C45/00B22D21/00B21J5/02B21J5/12
CPCG06K9/00B22D27/09B22D25/00C22C45/00G06K9/00577Y10T428/12778G06V20/80
Inventor 伊藤健介永安孝志姿知成清水正木村哲也
Owner FUJIFILM BUSINESS INNOVATION CORP