Electromagnetic steel sheet component and method for manufacture thereof
A technology of electromagnetic steel sheet and manufacturing method, applied in electrical components, manufacturing tools, electromagnetic relays, etc., can solve the problems of inability to obtain sufficient weather resistance, easy to rust, etc., achieve high magnetic permeability, small magnetic resistance, and reduce unqualified rate effect
Inactive Publication Date: 2012-10-24
ORMON CORP +1
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- Description
- Claims
- Application Information
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Problems solved by technology
However, sufficient weather resistance cannot be obtained with the above technology, and it is still prone to rust
Method used
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Embodiment
[0077] An electrical steel sheet substrate with a thickness of about 1mm having the components shown in Table 1 was punched into a size of 5mm×20mm, and the surface was degreased and cleaned with a hydrocarbon detergent. Then, annealing was performed under the conditions shown in Table 2.
[0078] Table 1
[0079] (weight%)
[0080]
[0081] Table 2
[0082]
[0083] The obtained samples were evaluated on the following items.
[0084] (surface component)
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Abstract
Disclosed is an electromagnetic steel sheet component which can show satisfactory levels of weather resistance and magnetic property even when a plated layer is not provided therein. Also disclosed is a method for manufacture of the electromagnetic steel sheet component. The component comprises an electromagnetic steel sheet base material having the following composition: Si: 0.20 to 1.20% by weight; Mn: 1.0% by weight or less; Al: 1.0% by weight or less; and the remainder: Fe and unavoidable impurities, and an SiO2 layer provided on the surface of the base material. In the component, the Si content at the surface layer part including the SiO2 layer (X; % by weight) and the Si content in the base material (Y; % by weight) satisfies the following relationship: X / Y = 5.2 to 11.2. The method comprises annealing the electromagnetic steel base material under a gas atmosphere composed of H2 and H2O.
Description
technical field [0001] The present invention relates to an electrical steel sheet part and a manufacturing method thereof. Background technique [0002] Conventionally, in the manufacture of electromagnetic steel sheet parts used in electromagnetic products such as electromagnetic relays, the stamped electrical steel sheet base material is subjected to heat treatment for improving magnetic properties and antirust treatment for improving electrical properties. In particular, without anti-rust treatment, the parts have poor weather resistance and rust, so good electrical conductivity cannot be guaranteed, and the requirements for use as electromagnetic steel parts cannot be met. Therefore, two processing steps of heat treatment and anti-rust treatment must be carried out before the parts are manufactured, so that the manufacturing time is very long, and there is also a problem in terms of manufacturing cost. [0003] Plating treatment is usually performed as an anti-rust trea...
Claims
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IPC IPC(8): C21D9/46C22C38/00C22C38/06H01F1/18
CPCH01F1/18H01F1/14791C22C38/06C22C38/02H01H50/163C22C38/04
Inventor 下田城毅高田昌良永乐智博
Owner ORMON CORP