HAIR SPRING MATERIAL FOR MECHANICAL CLOCK AND HAIR SPRING USING SAME

Title:

HAIR SPRING MATERIAL FOR MECHANICAL CLOCK AND HAIR SPRING USING SAME

Document Type and Number:

WIPO Patent Application WO/2014/034766

Kind Code:

A1

Abstract:

[Problem] To provide a hair spring material that is for a mechanical clock and that that can have less variation in Young's modulus than has been conventional. [Solution] The hair spring material for a mechanical clock comprises an alloy containing with respect to the total quantity thereof 37.5-39.5 mass% of Ni, 9.2-9.9 mass% of Cr, 0.35-0.55 mass% of Ti, and 0.6-0.9 mass% of Be, the remainder containing Fe and unavoidable impurities, and as the unavoidable impurities, C (carbon), over 0 mass% and no greater than 0.5 mass% of Mn, and over 0 mass% and less than 0.03 mass% of Al are contained, the C (carbon) being suppressed to no greater than 0.03 mass%.

Inventors:

HIRAI YOSHIROU (JP)
MATSUMOTO SHINICHI (JP)
TSUCHIYA KENJI (JP)
YAMAMOTO SHINJI (JP)

Application Number:

PCT/JP2013/073114

Publication Date:

March 06, 2014

Filing Date:

August 29, 2013

Export Citation:

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Assignee:

CITIZEN HOLDINGS CO LTD (JP)
CITIZEN WATCH CO LTD (JP)
HITACHI METALS LTD (JP)
NEOMAX MATERIALS CO LTD (JP)

International Classes:

C22C38/00; C22C38/50; F16F1/10; C21D9/02

Foreign References:

JP2010138491A	2010-06-24
JP2005140674A	2005-06-02
JPH1171625A	1999-03-16
JPS49134512A	1974-12-25

Other References: