FR2460744A1 - COMPOSITE METALLIC MATERIAL FOR DECORATIVE ARTICLES AND PROCESS FOR OBTAINING THE SAME - Google Patents

Abstract

COMPOSITE METAL MATERIAL FOR DECORATIVE ARTICLES CONSISTING OF MORE THAN TWO KINDS OF STARTING METAL MATERIALS IN DIFFERENT COLORS. THESE METALLIC MATERIALS ARE METALLURGICALLY BOUND BY THEIR RESPECTIVE ADJACENT SURFACES TO GIVE A COMPOSITE MATERIAL PRESENTING COMPLICATE DRAWINGS IN THE FORM OF FLAMES DEFINING A DECORATIVE PATTERN OF COLOR COMBINATIONS. THE INVENTION ALSO CONCERNS A PROCESS FOR MANUFACTURING SUCH A COMPOSITE MATERIAL.

Description

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  COMPOSITE METAL MATERIAL FOR DECORATIVE ARTICLES AND PRO-

CEDE FOR ITS OBTAINING.

  The present invention relates to metallic materials

  composites for decorative articles having on their surface

  after finishing the drawings in the shape of waves or flames

  or decorative patterns of color combinations. These men

  terials consist of more than two metallic materials, each of which is of a different color. The invention also

  object is a method for obtaining such articles.

  10. Usually, precious metals, different kinds of metals, their alloys, and composite materials made from these metals and their alloys are widely used to make various kinds of accessories, ornaments and handicrafts, etc. (hereinafter referred to overall as

  "decorative articles") comprising a wristwatch, a bra-

  celet, a lighter, a brooch, a loop, a pen, a case

  cigarettes, a pendant, a tie pin of the bou-

cuff tones and the like.

  Generally, composite materials consisting of

  rates and their alloys (hereinafter referred to as "materials

  composite metal ") used in the manufacture of

  The decorative elements above are obtained by

  soldering, adhesive bonding and the like. How-

  However, the inlay method has disadvantages

  insofar as a separation tends to occur at the

  or in the contact areas of the adjacent metallic materials, so that the associated metallic materials can be disjointed and spaced from each other. Even if

  such a disjunction of the metallic constituents does not occur.

  However, such spacings can very well be filled by foreign bodies such as dust, dirt, etc., so that the decorative articles made of these composite materials lose much of their appearance, which is not the case.

  desirable from an aesthetic point of view.

  The welding method and the adhesive bonding method are not satisfactory either because the welding material or the adhesive material inevitably remain apparent to the

  junction or in the contact areas of metallic materials

  adjacent areas. This upsets the color combination -2-

  and the rate of composite materials.

  Moreover, with the above methods, the choice of

  metal materials is very limited for composite materials.

  websites; therefore, if relatively simple combinations

  many colors are possible, this is no longer true for

  complicated color combinations.

  An object of the present invention is to provide a new

  metal composite material for decorative articles

  which do not have the disadvantages of metal

  composite composites of the prior art.

  Another object is to provide a new metal material

  composite with a complicated decorative pattern of

color combination.

  Another object is to provide a manufacturing method

  of such a composite metal material.

  According to the present invention, more than two

  als. different colors, in the form of powder, granulated, bar, plate, chips ... are introduced

  in a metal container, made of metal with a melting point

  less than that of the starting metallic materials. A lubricant

  If necessary, it can be applied to the

  inner surface of the metal container. The container

  is then sealed under vacuum and subjected to

  at least 30% of the total treatment

  thermal, as hot rolling, hot extrusion, ex-

  hydrostatic pressure hot-pressing, hot-drawing, etc ... so that the adjacent metallic materials are metallurgically bonded to each other. Then the container

  metal is separated from metallurgical metallic

  linked, by separation treatment, smoothing or cutting.

  The composite material is obtained whose surface has a

  decorative pattern complicated by a combination of colors

  naked by the flame effect produced by the heat treatment.

  The composite material thus obtained may be subjected to

  finish to produce a satin effect on the surface.

  the color contrast of the composite material

  you. As indicated above, the percentage of heat treatment is chosen to be greater than 30% of the total heat treatment. Indeed, if we apply less

  % of the total heat treatment, some combinations

  metal materials are not completely

  tallurgically linked to each other. It is therefore necessary

  to apply more than 30% of the total

  for any combination of metallic materials

  forming the composite metallic material.

  FIG. 1 is a perspective view, with a portion in cross-section, of a cylindrical body filled with metallic starting materials of different colors, showing a

  embodiment of the present invention.

  FIG. 2 is a similar view of FIG.

  showing the cylindrical body and its metallic materials as-

in the flat state.

  FIG. 3 is a perspective view of the composite material

  posite obtained according to the present invention.

  The present invention will be illustrated by the following examples:

  with reference to the drawings.

Example 1

  Particles made of 18-carat gold alloy (75% Au, -25% Cu) of reddish color, particles of 18-carat gold alloy (75% Au - 20% Pd-5% Ag) whitish and

  18-carat gold alloy particles (75% Au - 17% Ag -

  8% Cu) of yellowish color (all these percentages being

  born by weight) are prepared as starting materials. These three kinds of 18-carat gold alloys have a particle diameter of 1 to 3 mm. Then the three kinds of gold alloy particles are mixed together equally. The mixture is then poured into a cylindrical container, whose bottom is closed and made of mild steel as shown in Figure 1; the container has an inside diameter of 30 mm, a length of

  mm and a thickness of 2 mm. The internal pressure of the

  container is kept at a vacuum of 10-5 torr and then closed. The closed vessel is then heated to 750 ° C. and then subjected to 30% heat treatment by hot rolling three times. The container takes on a flattened shape as shown in FIG. 2. The hot rolled vessel is then immersed in a bath. diluted sulfuric acid where the container is separated from the filler metal materials. The resulting gold alloy particles, thus separated from the container, are subjected to a heat treatment, again at 7500.degree.

  seven times to hot rolling corresponding to 20% of the

  to obtain a composite material with a thickness of

  2.5 mm, as shown in Figure 3. The composite material thus obtained is constituted in such a way that the three kinds of particles of gold alloys

  have been completely metallurgically linked by their surface

  these respective adjacent. The composite material has a pattern

  complicated decorative combination of color obtained by the ef-

  flames produced by hot rolling.

Example 2

  Chips, whitish, stainless steel (SUS 385) and pure copper chips, reddish color

  are prepared as starting materials. These materials are

  languishing between them in equal quantity. The starting materials

  are introduced into a die whose interior has a wide

  100 mm width, 50 mm length and mm depth. The metal materials thus filled are subjected to a pressure of 30 kg / mm 2 in a compaction compact. Then it is placed in a mild steel box of thickness mm, inner width 100 mm, inner length mm and depth 9 mm. Then, the box is placed under vacuum and closed, heated in this state to 9000C and subjected

  twice to hot rolling corresponding to 30% of the

  is lying. The hot rolled box is soaked in a bath

  dilute sulfuric acid to separate said box from

  fillers by a separating treatment.

  to obtain a composite metallic material. This is obtained in such a way that the chips of stainless steel and those of pure copper are completely metallurgically bound

  by their respective adjacent surfaces. The composite material

  site has a complicated decorative pattern of color combination

  due to the flames produced by hot rolling.

  The composite metallic material thus obtained can be

  cold-rolled sheets of thickness suitable for their use

practical implementation.

Example 3

  The composite material of the three kinds of gold alloys prepared according to the method illustrated in Example 1 is subjected to polishing and an embossing operation to obtain a satin finish. We get a sharp contrast between

  the colors constituting the decorative motif of the composite material

  posite. Such a satin finish can be obtained by any other usual operation of size such as engraving to

  etching (or stripping) and a diamond cut.

  Metallic materials other than those illustrated in the previous examples can be used as starting materials. As metallic starting materials of color

  whitish, mention may be made of mild steel, nickel and its

  bindings, aluminum and its alloys, titanium and its alloys, cupronickel, monal, silver-nickel, silver and its alloys and the like; as the starting metallic material of yellowish color, mention may be made of gold, bronze, aluminum bronze and the like; as a starting metallic material

  reddish color, one can quote the pure copper, the alloys

  low copper content and the like.

  The composite metallic material according to the present invention

  tion has the advantage that metallic

  are so intimately metallurgically combined that they will not be able to deviate or detach themselves from the composite material,

  even if it is subjected to a severe plastic treatment.

  In addition, the composite metallic material has a distinct pattern.

  very elegant complicated corative and can be produced simply

and in an economical way.

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Claims (4)

  1 / Composite metal material for decorative articles composed of more than two kinds of metallic materials of   different colors, characterized by the fact that   metals are metallurgically bound by their   respective adjacent faces to give a composite material.   said composite material having shaped drawings   flames defining a decorative pattern of neck combination   -their. 2 / composite metal material according to claim 1, characterized in that it has, on its surface, a satin finish.   3 / A process for manufacturing a metallic material   posite for decorative articles, characterized in that it comprises the following steps:   - introduction of more than two kinds of metal   of different colors and of chosen shape, in a metal container, - vacuum sealing of said container, - hot rolling of said container to more than 30% of the   the entire treatment, so that the metallic materials   metallurgically linked by their adjacent surfaces.   respective centes, - and separation of the container from the metallic   filled to obtain a composite metallic material   so many complicated flame-like drawings defining   a decorative pattern of color combination.   4 / A method according to claim 3, characterized in that it further comprises a satin finishing step   on the surface of the composite metallic material, after the ration of separation.   DEPOSITOR: MITSUBISHI KINZOKU KABUSHIKI KAISHA AGENT: Cabinet Michel LAURENT