JPS61157652A - Metallic ornament - Google Patents

Abstract

PURPOSE:To produce the metallic ornaments of white color feeling smooth and giving a high-grade impression by using an alloy made by incorporating specific amounts of Ti, or further Ta and Zr to Nb. CONSTITUTION:The Nb alloy containing, by weight, 40-60% Ti, or further <35% Ta and/or <5% Zr is used as the material for the white-colored ornaments, such as lighters, bracelets, the frame of spectacles, ball-point pens, propelling pencils, cuff buttons, buckles, outer ornaments of watches and the like. By use of this alloy, the white-colored ornaments excelling in corrosion resistance as well as in cold working, feeling smooth, and giving a high-grade impression can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a metal ornament made of a Nb alloy and having a high quality texture with excellent texture.

[Technical background of the invention and its problems] Traditionally, metals have been used for lighters, due to their specularity and workability.
It is used as a material for various decorative items such as bracelets and eyeglass frames, and it has a decorative surface with intricate fine processing such as checkerboard patterns and wavy striped patterns, rather than just a mirror finish, making it highly decorative. This is often required.

These metal ornaments are usually roughly divided into white and gold, and among these, materials traditionally used for white metal ornaments include brass chrome plating, duralumin, and silver. Among these, brass casting has good workability, but it is easily rusted, so it has to be plated with chrome plating, etc., which has the disadvantage of complicating the process. Furthermore, even if duralumin is processed to form a surface pattern into a complex shape, it has the disadvantage that the finished product cannot have a high-quality texture.

Generally speaking, although silver is highly workable and has a good texture, it has the drawback of being expensive.

For this reason, none of the conventional white metal decorative materials has been satisfactory.

[Objective of the Invention J The present invention has been made in response to the above-mentioned conventional circumstances, and provides a white metal ornament with a luxurious feel using a material with excellent cold workability and corrosion resistance. The purpose is to

[Summary of the Invention J] That is, the metal ornament of the present invention contains 1140 to 60% by weight, with the remainder consisting essentially of Nb, and one or both of Ta 35% by weight or less and Zr 5% or less by weight. It is characterized by containing 140 to 60% by weight of Nb and T1, with the remainder consisting essentially of Nb.

Ti, which is an additive component of the present invention, is from 40 to 40% of the total alloy components.
Add 60% by weight. If it is less than 40% by weight, the cost will be high and the processability will be poor, and if it is more than 60% by weight, the processability will be poor, so both are not preferable.

Ta and zr, which are other additive components, are optional additive components, and are added in amounts of 35% by weight or less and 5% by weight or less, respectively. If added in excess of the required range, processability will deteriorate, which is not preferable. Moreover, the maximum addition ratio decreases as the addition ratio of T1 increases. The reason is that T' a and Zr reduce workability together with Ti, and the total amount of these is 40 to 6
Preferably it is 0% by weight.

The metal ornament of the present invention is manufactured, for example, as follows. Alloy components are melted by arc melting or electron beam (EB)
) After being melted by melting or the like, it is forged and rolled, then formed by cold deep drawing, and then a decorative finish on the surface is formed by cold forming. Note that it is also possible to perform coloring by chemical conversion treatment, if necessary.

Metal ornaments manufactured in this way include lighters,
In addition to bracelets and eyeglass frames, products include fountain pen, ballpoint pen, and mechanical pencil cases, baby caps, cufflinks, buckles, tie bins, watch accessories, and various cases.

[Embodiments of the invention] Next, examples of the present invention will be described.

A lighter case 1 and a fire extinguishing pig 2 of a lighter 3 shown in the drawings were manufactured as described below.

A component consisting of 45% by weight of Nb and the balance T1 was arc melted and forged and rolled to form a thin plate with a thickness of 1 nm. Next, cold deep drawing is performed in three steps to produce the outer shapes of the lighter case 1 and the fire extinguishing lid 2, and then the decorative patterns of the striped box part 1a and the checkered part 1b are cold formed by knurling. Finished with decoration. A lighter 3 was manufactured using the lighter case 1 and the fire extinguisher 2 thus obtained.

The obtained lighter 3 had a complex decorative finish on its surface, had a moderate weight, and had a luxurious feel. Also, the corrosion resistance due to sweat etc. was also good.

C Effects of the Invention The Nb alloy according to the present invention has excellent cold workability, especially stretch formability, so it is possible to form a complex curved surface and also has good thick wall formability. It also has excellent corrosion resistance, so there is no need to worry about metal ornaments corroding due to sweat, hand grime, etc., making it especially suitable for jewelry such as bracelets and eyeglass frames.

[Brief explanation of drawings]

The drawing is a perspective view of a lighter that is an embodiment of the present invention.

Claims (2)

[Claims] (1) Contains 40 to 60% by weight of Ti, with the remainder being substantially N.
A metal ornament characterized by consisting of b. (2) A metal ornament containing 35% by weight or less of Ta, 5% by weight or less of Zr, or both, and 40 to 60% by weight of Ti, with the remainder substantially consisting of Nb.