Metal structure, method of manufacturing metal structure, spring component, chronograph coupling lever for timepiece, and timepiece
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United States of America Patent
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Apr 12, 2016
Grant Date -
Sep 18, 2014
app pub date -
Mar 11, 2014
filing date -
Mar 14, 2013
priority date (Note) -
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Abstract
A metal structure includes, by mass %, Fe: 10% to 30%; S: 0.005% to 0.2%; and the balance consisting of Ni and unavoidable impurities, in which a maximum grain size of the metal structure is 500 nm or less. The metal structure preferably has one or more of a stress relaxation rate of 10% or less, a lattice constant of 3.535 Å to 3.56 Å, a yield stress of 1500 MPa or more, a Young's modulus of 150 GPa or more and a Vickers hardness of Hv 580 or more.
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