Method and apparatus for producing amorphous alloy sheet, and amorphous alloy sheet produced using the same
a technology of amorphous alloy and production method, which is applied in the field of producing amorphous alloy sheets and amorphous alloy sheets produced using the same, can solve the problems of not being suitable for mass not being cost effective, and not being able to meet the requirements of bulk production of amorphous alloy sheets, and achieves low production cost, high quality, and high quality.
Inactive Publication Date: 2006-05-18
POSTECH ACAD IND FOUND
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Benefits of technology
[0011] The present invention provides a method for producing a bulk amorphous alloy sheet with high quality at low production cost, by which an alloy melt can be directly transformed into a sheet form without using other additional processes.
[0012] The present invention also provides an apparatus for producing a bulk amorphous alloy sheet with high quality at low production cost, and a bulk amorphous alloy sheet.
Problems solved by technology
However, despite the demands in various industrial fields, there have not yet been developments on efficient and industrially applicable methods for mass-producing an amorphous alloy sheet.
However, die casting and permanent mold casting are inappropriate to mass-produce amorphous alloy sheets that can be used for various purposes, as well as are not cost effective.
However, since this process is intended for production of an amorphous alloy material in the form of an ultra-thin strip of about 0.05 mm or less in thickness, it is not suitable for production of a bulk amorphous alloy sheet.
However, it has been understood that a conventional strip casting process is not suitable for production of an amorphous alloy sheet, and thus, no reports have been made on examples of use of a conventional strip casting process for production of an amorphous alloy sheet.
Method used
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example
[0062] In this Example, a copper-based alloy with its chemical composition presented in Table 1 was used as a mother alloy. An apparatus shown in FIG. 2 was used.
TABLE 1Chemical composition of mother alloyElementsCuTiZrNiSnSiContent (atomic %)473311621
3 kg of a copper-based mother alloy was loaded into a high purity graphite crucible and then maintained at a temperature of about 1,400° C. for about 60 minutes to be completely melted into a liquid phase. A copper-based mother alloy melt thus obtained was discharged while being maintained at a temperature of about 1,200° C., and then transferred into an inlet between rolling rolls of the strip casing apparatus
[0063] The rotation rate, surface temperature, and gap of the rolling rolls were about 2.0 cm / sec, about 20° C., and about 2 mm, respectively. Under these process conditions, amorphous alloy sheets of 1 m in length, 10 cm in width, and 2 mm in thickness were prepared.
[0064] The non-crystallinity of the copper-based amorphous...
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Abstract
The present invention provides a method for producing a bulk amorphous alloy sheet with high quality at low production cost, by which an alloy melt can be directly transformed into a sheet form without using other additional processes. The method comprises preparing a melt containing alloy components; feeding the melt into a gap defined between two rolls, which rotate in opposite direction to each other, and each of which is provided with heat exchange means; and cooling the melt at a cooling rate higher than the critical cooling rate for transformation of the melt into an amorphous solid phase, when the melt passes through the gap defined between the two rolls. The present invention also provides an apparatus for producing a bulk amorphous alloy sheet with high quality at low production cost, and a bulk amorphous alloy sheet.
Description
CROSS REFERENCE TO RELATED APPLICATIONS [0001] This application is a 35 U.S.C. § 371 National Phase Entry Application from PCT / KR03 / 001966, filed Sep. 26, 2003.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to a method for producing an amorphous or noncrystalline alloy, and more particularly, to a method for producing a bulk amorphous alloy sheet. [0004] 2. Description of the Related Art [0005] An amorphous alloy is a material that has a liquid phase-like microstructure with no crystallinity due to disordered arrangement of atoms, and contains no crystalline imperfections such as grain boundary and dislocation, unlike a conventional crystalline alloy. Therefore, an amorphous alloy is a significantly improved material in terms of mechanical properties such as strength, magnetic properties, corrosion resistance, and the like. [0006] Due to the above-described excellent characteristics, there have been increasing interests on amorphous...
Claims
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IPC IPC(8): B22D25/00B22D11/06C22C45/00B22D11/112
CPCB22D11/0622B22D11/0682B22D11/0697B22D11/112C22C45/001
Inventor LEE, JUNG GUPARK, SUNG SOOLEE, DONG GEUNKIM, NACK JOONPARK, YOUNG SOOLEE, SUNGHAKKIM, CHANG KYULEE, HAN SANG
Owner POSTECH ACAD IND FOUND
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