Title:
【発明の名称】鍛造成形品およびその製造方法
Document Type and Number:
Japanese Patent JP3320037
Kind Code:
B2
Abstract:
PURPOSE: Disclosed is a lightweight metallic molded part for casing body for portable electronic apparatuses or the like easily thickness-deviation-forming a boss, rib or the like and capable of mass-production by charging a rithium- containing magnesium alloy at least having a rithium beta phase structure to a molding die heated to a specified temperature range and executing forging. CONSTITUTION: A lithium-containing magnesium alloy at least having a lithium β-phase structure is charged to a molding die heated at 100 to 250 deg.C and is forged. Since this magnesium alloy hardly shows work hardening, the purpose can be attained. By controlling the content of lithium in the magnesium alloy to 6 to 10.5 wt.%, excellent corrosion resistance can be obtained Moreover, by incorporating the magnesium alloy with at least either less than 4 wt.% of zinc or more than or equal to 6 wt.% of aluminum, its strength can be improved. Furthermore, by preheating the magnesium alloy lower than or equal to 300 deg.c before its charging to the molding die, after the charging of the material, it can swiftly be molded.
Inventors:
Ken Matsuda
Hiroyuki Hanato
Hiroyuki Hanato
Application Number:
JP19688399A
Publication Date:
September 03, 2002
Filing Date:
July 12, 1999
Export Citation:
Assignee:
Sharp Corporation
International Classes:
B21J5/00; C21D1/02; C22C23/00; C22C23/06; (IPC1-7): C22C23/00; B21J5/00; C21D1/02
Domestic Patent References:
| JP4176839A | ||||
| JP941066A | ||||
| JP3236452A | ||||
| JP57104641A |
Other References:
Ｋａｉｂｙｓｈｅｖ，Ｏ．Ａ．ら，Ｍｅｃｈａｎｉｃａｌ ｐｒｏｐｅｒｔｉｅｓ ｏｆ ｔｈｅ Ａｌｌｏｙ ＩＭＶ−２ ａｆｔｅｒ ｓｕｐｅｒｐｌａｓｔｉｃ ｄｅｆｏｒｍａｔｉｏｎ，Ｉｚｖ．Ｖｙｓｓｈ．Ｕｃｈｅｂｎ．Ｚａｖｅｄ．，Ｔｓｖｅｔｎ．Ｍｅｔａｌｌ．，ロシア，４，Ｐ．７８−８２
Attorney, Agent or Firm:
Takaya Koike (1 person outside)