Magnesium alloy sheet processing method and magnesium alloy sheet

a magnesium alloy and processing method technology, applied in the direction of metal rolling arrangements, etc., can solve the problems of magnesium alloy being considered unsuitable for rolling, significant difficulty in providing a plastic strain (deformation) of 10% or more at ambient temperature, longitudinal cracking of a material, etc., to achieve low intrinsic deformation, high rolling reduction, and low deformation.

a magnesium alloy and processing method technology, applied in the direction of metal rolling arrangements, etc., can solve the problems of magnesium alloy being considered unsuitable for rolling, significant difficulty in providing a plastic strain (deformation) of 10% or more at ambient temperature, longitudinal cracking of a material, etc., to achieve low intrinsic deformation, high rolling reduction, and low deformation.

US20080075624A1Inactive Publication Date: 2008-03-27OSAKA UNIV
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  • Magnesium alloy sheet processing method and magnesium alloy sheet
  • Magnesium alloy sheet processing method and magnesium alloy sheet
  • Magnesium alloy sheet processing method and magnesium alloy sheet

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Embodiment Construction

[0120] Hereinafter, the present invention will be described based on the best mode for carrying out the invention. It should be noted that the present invention would not be limited to the following embodiments. Various modifications can be made to the following embodiments within the scope identical to the present invention and the scope of its equivalence.

[0121] (Rolled Material)

[0122] As a rolled material, a magnesium alloy sheet equivalent to ASTM AZ31B was prepared. The composition of the sheet includes the following basic blending materials: 3.0 weight percent of Al; 1.0 weight percent of Zn; and 0.4 weight percent of Mn, and the remainder of which is magnesium. It is to be noted that the composition includes 0.3 weight percent of unavoidable impurity at the maximum, and 0.01 weight percent or less of Si.

[0123] Furthermore, the sample sheet has the following dimensions: a thickness of 2.5 mm; a width of 30 mm; and a length of 300 mm.

[0124] Moreover, in order to remove resi...

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Abstract

A magnesium alloy sheet processing method wherein a magnesium alloy sheet is rolled at a speed of 180 m / min or more. Particularly, a magnesium alloy sheet processing method, wherein the magnesium alloy sheet is rolled at a speed of 450 m / min or more. A magnesium alloy sheet processing method, wherein a rolling tool which is not heated is used. A magnesium alloy sheet processing method, wherein the temperature of the magnesium alloy sheet immediately before the rolling is in the range of 0° C. to 400° C. A magnesium alloy sheet, wherein the sheet has an average crystal grain of 4 μm or less, and does not internally include any unbonded interface in parallel with a direction of rolling. A magnesium alloy sheet, wherein the sheet has an average grain size of 4 μm or less, and has an internal grain boundary formed by a clean grain boundary.

Description

TECHNICAL FIELD [0001] The present invention relates to a magnesium alloy sheet processing method and a magnesium alloy sheet, and in particular relates to a method for rolling a magnesium alloy sheet at a speed as high as 180 m / minor more, and to a magnesium alloy sheet having an excellent mechanical strength and the like. BACKGROUND ART [0002] Since a magnesium alloy has a high specific strength and an excellent electromagnetic wave absorption characteristic, the utilization thereof is being increased in casings or the like for portable electronic devices such as mobile phones. Actually, a magnesium alloy has a crystal lattice with a close-packed hexagonal structure, and has, at a room temperature, a deformation mechanism consisting mainly of a basal plane slip that causes deformation in a direction perpendicular to the c axis, thus making it significantly difficult to provide a plastic strain (deformation) of 10% or more at an ambient temperature. Therefore, in order to carry out...

Claims

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Application Information

Patent Timeline
27 Mar 2008
Publication
US20080075624A1
IPC
C22C23/02; C22C23/04; C22F1/06
CPC
B21B3/00; C22F1/06; C22C23/04; C22C23/02
Inventors
SAKAI, TETSUO; UTSUNOMIYA, HIROSHI