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Pt ALLOY FOR JEWELRY

An alloy and jewelry technology, applied in the field of Pt950 alloy, can solve the problems of damage, deformation, and the hardness of Pt950 alloy is difficult to solve, and achieve the effect of reducing casting defects

Active Publication Date: 2018-01-19
KOBO GLEAM CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] High-quality alloys are preferred in jewelry. Therefore, an alloy (Pt950) containing 95% Pt by mass ratio is required. However, the problem of the hardness of this Pt 950 alloy is not easy to solve, and damage and deformation during use become problems.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] Examples are shown in Table 1.

[0034] [Table 1]

[0035]

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PUM

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Abstract

Because high quality alloys are preferred in jewelry items made of a Pt alloy, alloys containing 95 mass% of Pt (Pt950) are required, but Pt950 alloys exhibit low hardness, and therefore suffer from problems such as being easily damaged or deformed during use. Such problems can be solved by using a Pt alloy for jewelry which contains 0.5-4.5 mass% of Ga and 0.5-3.5 mass% of In, with the remaindercomprising 95 mass% of Pt.

Description

Technical field [0001] The invention relates to Pt 950 alloy used in jewelry such as brooches, rings, necklaces, pendants, earrings and the like. Background technique [0002] Among jewelry products that are white precious metals, Pt is preferred, but the hardness of pure Pt is about Hv 30-40, and there is a problem of insufficient hardness for jewelry applications. [0003] However, Pt is a metal excellent in various characteristics, especially discoloration resistance, and therefore, a Pt alloy is preferable. [0004] Regarding the Pt alloy for jewelry, there are alloys of Pt 850, Pt 900, and Pt 950 specified in the JIS standard. However, there are no regulations on added metals. Generally, alloys formed of multiple metals containing Pd, Ru, Ag, or Ir are used ( For example, patent literature, patent literature 2). [0005] Prior art literature [0006] Patent literature [0007] Patent Document 1: Japanese Patent Application Publication No. 2000-52087 [0008] Patent Document 2: Japa...

Claims

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Application Information

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IPC IPC(8): C22C5/04B22D21/00
CPCB22D21/00C22C5/04
Inventor 成濑重靖
Owner KOBO GLEAM CO LTD
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