| 摘要 |
An objective of the present invention is to provide a rolled sheet including an Fe-Cu alloy including 3-30 % by weight of iron (Fe) and copper (Cu) having a remaining content, that is, 70-97 % by weight of Cu. The rolled sheet including the Fe-Cu alloy according to the present invention is molded in the form of a slab by using molten metal of an Fe-Cu master alloy and Cu, and the resultant is rolled at the total rolling reduction of at least 90% through heat treatment and a tight rolling mill, thereby manufacturing the Fe-Cu alloy rolled sheet having the thickness of 100-10 μm and including 3-30 % by weight of Fe and 70-90 % by weight of Cu. Since the Fe-Cu alloy rolled sheet according to the present invention shields an electromagnetic wave of at least 80 dB at the high frequency region of 1-1.5 GHz, superior electromagnetic shielding effectiveness can be represented. Accordingly, since the Fe-Cu alloy rolled sheet has advantages of controlling an erroneous operation caused by noise in an precision apparatus, a robot, and a vehicle and reducing noise of a cellular phone, the Fe-Cu alloy rolled sheet can be used as electromagnetic shielding materials. [Reference numerals] (4) Measurement result; (AA) Name; (BB) The highest shielding effect; (CC) The lowest shielding effect; (DD) CFA90 (0.1T rolling material); (EE) 80 dB or more (30MHz~1.5GHz); (FF) Note)"or more" refers to that a shielding effect higher than a shielding effect up to the maximum measurement range that can be ensured through measurement equipment can be expected.; (GG) Flat plane and shielding effect; (HH) The above mark is a 2D code used to compare with an original material in an electronic confirmation matching program thereafter. |
