Titanium Alloy Watch Connection Member Corrosion Resistance
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Solution Overview
Problem
Wristwatch connection members made of cobalt-nickel alloy are prone to corrosion when exposed to seawater, compromising their durability and reliability in marine environments.
Innovation Solution
The connection member features a cylindrical structure with a corrosion-resistant titanium alloy spring member and connecting pin, utilizing a β titanium alloy with a strong titanium oxide coating for enhanced corrosion resistance and a high-strength α-β titanium alloy for the cylindrical member and connecting pin, ensuring the spring member's spring property and preventing corrosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a cobalt-nickel alloy is used for the spring member, then the spring property and non-magnetic characteristics are improved, but corrosion resistance in seawater deteriorates
Solution Approach 1:
The patent uses a titanium alloy (specifically β titanium alloy or α-β titanium alloy) for the spring member instead of cobalt-nickel alloy. This material substitution provides both the required spring property and excellent corrosion resistance in seawater environments, resolving the contradiction between mechanical performance and corrosion resistance.
2Reliability
If a corrosion-resistant material is used for the spring member, then corrosion resistance is improved, but the spring property may deteriorate
Solution Approach 1:
The patent specifies using β titanium alloy or α-β titanium alloy with controlled material parameters to achieve both corrosion resistance and spring property. The material selection and composition control ensure that the spring member maintains adequate elasticity and spring characteristics while providing excellent corrosion resistance in marine environments.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively prevents corrosion, allowing the wristwatch to function reliably even in seawater, with improved strength and workability, ensuring the connection member's longevity and performance.
Implementation Method 1
a spring member which is arranged in the cylindrical member and forces the connection portion toward outside of the cylindrical member
Implementation Method 2
a corrosion-resistant titanium alloy spring member... utilizing a β titanium alloy with a strong titanium oxide coating for enhanced corrosion resistance
Data Source
AI summary
A connection member including a cylindrical member, a connection portion which is inserted into at least one end portion of the cylindrical member, and a spring member which is arranged in the cylindrical member and forces the connection portion toward outside of the cylindrical member, in which the spring member is formed of a corrosion-resisting material.