PLATE SPRING MEMBER
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United States of America
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Issued Date -
Apr 22, 2021
app pub date -
Mar 28, 2019
filing date -
Mar 28, 2019
priority date (Note) -
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Abstract
A plate spring member having a compressive residual stress distribution its which a compressive residual stress of at least part of a portion having a depth from a surface within 50 μm is 500 MPa or more, and the compressive residual stress of a portion having a depth from the surface exceeding 50 μm is less than 500 MPa.
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