Magnesium hot rolling method and apparatus

US20110100083A1Inactive Publication Date: 2011-05-05IHI METALTECH CO LTD +1
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
IHI METALTECH CO LTD
Publication Date
2011-05-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

A magnesium alloy hot rolling method includes: a first rolling step in which a magnesium plate (M0, M1) is rolled reciprocatingly between an upstream heating furnace (2) which is located on an upstream side of a rolling mill (1) and which heats the magnesium plate (M0, M1), and a upstream heating furnace (3) which is located on a downstream side of the rolling mill (1) and which heats the magnesium plate (M0, M1); and a second rolling step in which the temperature of respective end portions of the magnesium plate (M0, M1) on both the upstream and downstream sides is maintained while the magnesium plate (M0, M1) is being rolled reciprocatingly between an upstream temperature maintaining apparatus (5) which transports the heated magnesium plate (M0, M1) while maintaining the temperature thereof, and a downstream temperature maintaining apparatus (6) which transports the heated magnesium plate (M0, M1) while maintaining the temperature thereof. According to the magnesium hot rolling apparatus of the present invention and to the magnesium hot rolling method of the present invention which uses this apparatus, it is possible to prevent any deterioration in the quality of a product which is due to temperature variations during the hot rolling of magnesium alloy.
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Description

TECHNICAL FIELD

[0001] The present invention relates to a magnesium hot rolling method and to a magnesium hot rolling apparatus.

[0002] Priority is claimed on Japanese Patent Application No. 2007-269058, filed Oct. 16, 2007, the contents of which are incorporated herein by reference.TECHNICAL BACKGROUND

[0003] To manufacture a magnesium sheet from magnesium alloy, a round bar-shaped billet having, for example, a diameter of approximately 300 to 400 mm and a length of approximately 500 to 600 mm is molded by hot extrusion molding into a thick plate having a thickness of, for example, 10 mm or less. This thick plate is then cut to a predetermined length (for example, 3 m) so as to form a cut plate material, and this cut plate material is then rolled to a thickness of not more than 1 mm by rough rolling.

[0004] In order to roll magnesium alloy at room temperature a large amount of pressure is required. However, even if a large amount of pressure is applied, it still cracks easily. Accordingly,...

Claims

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