JP2001246456A - Molding of composite magnesium alloy with different kind of metal and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a molding composite magnesium alloy with different kind of metal as the alternate article of a magnesium alloy molding, in which while utilizing the advantage of the magnesium alloy molding, corrosion resistance as the disadvantage is improved. SOLUTION: After inserting the molding 5 of the different kind of metal composed of the different kind of metal as the main component from the magnesium, into metallic molds 1, 2, the magnesium alloy 4 is injection-molded into the molds to integrate the molding 5 of the different kind of metal with the magnesium alloy 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dissimilar metal composite magnesium alloy molded product in which a dissimilar metal molded product composed mainly of a metal different from magnesium and a magnesium alloy are integrated, and a method for producing the same.

[0002]

2. Description of the Related Art Magnesium alloy molded articles generally have low corrosion resistance and are insufficient in corrosion resistance even when coated. Therefore, a chemical conversion treatment using chromic acid was required before painting.

[0003]

However, the above chromic acid treatment generates toxic hexavalent chromium,
There is a problem in that handling is dangerous, and costs are high for work environment and wastewater treatment.

As a countermeasure, non-chromium treatment without using chromic acid has been put into practical use, but has not yet reached the level of corrosion resistance obtained by chromic acid treatment.

Further, both the chromic acid treatment and the non-chromic acid treatment are wet treatments, and include many steps such as alkali degreasing, acid washing, acid treatment, water washing, and drying, resulting in unstable quality and high cost. Was something.

Accordingly, the present invention solves the above-mentioned problems and, while taking advantage of the advantages of the magnesium alloy molded product, dissimilar metal composite magnesium as a substitute for a magnesium alloy molded product having improved corrosion resistance. An object of the present invention is to provide an alloy molded product and a method for producing the same.

[0007]

Means for Solving the Problems In order to achieve the above object, the present invention is configured as follows.

[0008] That is, according to the method of manufacturing a dissimilar metal composite magnesium alloy molded product of the present invention, a dissimilar metal molded product composed mainly of a metal different from magnesium is inserted into a mold, and then a magnesium alloy is injected and cast. It is configured such that a dissimilar metal molded product and a magnesium alloy are integrated.

Further, in the above invention, the dissimilar metal molded product may be configured to have a thickness of 1 mm or less.

[0010] In the above invention, the dissimilar metal molded product may be aluminum, copper, iron, nickel, chromium, tin,
You may comprise so that at least one of lead, zinc, indium, titanium, gold, silver, and platinum may be contained 50% or more.

[0011] In the above invention, the dissimilar metal molded product may be made of aluminum,
You may comprise so that it may have the part containing at least 1% of zinc 50% or more.

Further, in the above invention, the dissimilar metal molded article may have a colored layer on the entire surface or a part thereof.

[0013] In the above invention, the dissimilar metal molded product may have a hole or an opening.

Further, in the above invention, the dissimilar metal molded article may be formed into a shape approximating the outer shape of the dissimilar metal composite magnesium alloy molded article.

[0015] In the above invention, at least one of the mold and the dissimilar metal molded product may be configured to have a fine uneven pattern.

Further, in the above invention, the release agent may be applied to the mold only at a portion where the dissimilar metal molded product does not contact the inside of the mold.

Further, the heterogeneous metal composite magnesium alloy molded article of the present invention is configured such that a heterogeneous metal molded article whose main component is made of a metal different from magnesium is integrally laminated on the surface of the magnesium alloy molded article. .

Further, in the above invention, the dissimilar metal molded product may be configured to have a thickness of 1 mm or less.

Further, in the above invention, the dissimilar metal molded product is made of aluminum, copper, iron, nickel, chromium, tin,
You may comprise so that at least one of lead, zinc, indium, titanium, gold, silver, and platinum may be contained 50% or more.

[0020] In the above invention, the dissimilar metal molded product may be made of aluminum,
You may comprise so that it may have the part containing at least 1% of zinc 50% or more.

In the above invention, the dissimilar metal molded article may have a colored layer on the entire surface or a part thereof.

[0022]

Embodiments of the present invention will be described in detail with reference to the drawings.

FIGS. 1 to 4 are cross-sectional views showing one embodiment of a method for manufacturing a dissimilar metal composite magnesium alloy molded article according to the present invention. FIGS. 5 to 10 are cross-sectional views showing one embodiment of the dissimilar metal composite magnesium alloy molded product of the present invention. In the drawing, 1 is a movable mold, 2 is a fixed mold, 3 is a suction hole, 4
Is a magnesium alloy, 5 is a dissimilar metal molded product, 6 is a gold layer,
7 is a silver layer, 8 is a nickel layer, 9 is a coloring layer, 10 is a copper layer,
Reference numeral 11 denotes a dissimilar metal composite magnesium alloy molded product.

According to the method for manufacturing a heterogeneous metal composite magnesium alloy molded article 11 of the present invention, a magnesium alloy 4 is injected after inserting a heterogeneous metal molded article 5 whose main component is made of a metal different from magnesium into the molds 1 and 2. This is a method of casting and integrating the dissimilar metal molded product 5 and the magnesium alloy 4 (see FIGS. 1 to 4).

First, a dissimilar metal molded product 5 whose main component is made of a metal different from magnesium is inserted into the dies 1 and 2.

The dissimilar metal molded product 5 may be a flat plate or may have a three-dimensional shape (FIG. 1).
3). Further, it may be a hoop shape (see FIG. 4). Specifically, a metal foil or a metal plate, or a press-formed product, an etched product, a cast product, a forged product, a cut product, or the like can be used.

In the case where it is difficult to deform the dissimilar metal molded product 5 so that it is brought into close contact with the cavity surface by the pressure of the magnesium alloy 4 injected into the dies 1 and 2, What is necessary is just to shape it into a shape approximating the outer shape of the dissimilar metal composite magnesium alloy molded article 11 and insert it into the dies 1 and 2.

The thickness of the dissimilar metal molded product 5 is preferably 1 mm or less. Due to the pressure in the mold at the time of injection casting, the dissimilar metal molded product 5 can be deformed so as to closely adhere to the cavity shape, and the magnesium alloy 4 can be integrated without going around the front side of the dissimilar metal molded product 5 This is because excellent corrosion resistance can be imparted.
The thickness of the dissimilar metal molded product 5 is preferably 1 μm or more. If the thickness is less than 1 μm, the strength of the dissimilar metal molded product 5 is insufficient, and it is difficult to maintain the shape.

The dissimilar metal molded product 5 is made of aluminum, copper,
Base metals such as iron, nickel, chromium, tin, lead and zinc, rare metals such as indium and titanium, gold,
Precious metals such as silver and platinum, and alloys and laminates thereof can be used. The dissimilar metal molded product 5 preferably contains at least 50% or more of aluminum, copper, iron, nickel, chromium, tin, lead, zinc, indium, titanium, gold, silver, and platinum. By employing these metals, the dissimilar metal composite magnesium alloy molded article 1
1, surface modification can be performed to impart corrosion resistance, decoration function, protection function, change mechanical properties, change electromagnetic properties, and the like.

In particular, it is preferable to use aluminum, zinc or an alloy thereof as the dissimilar metal molded product 5. This is because even if these metals come into contact with the magnesium alloy 4 as the casting metal, there is no possibility that contact corrosion of different metals occurs.

Further, in order to integrate metals other than aluminum, zinc and their alloys with the magnesium alloy 4 which is a casting metal, the surface of the dissimilar metal molded product 5 in contact with the magnesium alloy 4 is made of aluminum or zinc. What is necessary is just to have the part which contains at least one more than 50%. This makes it possible to integrate the dissimilar metals without the risk of contact corrosion of the dissimilar metals. For example, as the dissimilar metal molded product 5, a product composed of a plurality of metals, such as a product formed by depositing a gold layer on a surface of the aluminum metal foil that does not contact the magnesium alloy 4, can be used.

FIG. 8 shows a dissimilar metal composite magnesium alloy obtained by inserting an aluminum foil on which a copper layer 10 is entirely formed as a dissimilar metal molded product 5 into the molds 1 and 2 and injection-injecting and integrating a magnesium alloy 4. An example of an alloy molded product 11 is shown. In order to form the copper layer 10, a vacuum plating method, a wet plating method, a paste printing method, or the like may be used. In FIG. 9, an aluminum foil partially formed with a gold layer 6, a silver layer 7 and a nickel layer 8 is inserted into the molds 1 and 2 as a dissimilar metal molded product 5, and the magnesium alloy 4 is injection-molded. An example of an integrated dissimilar metal composite magnesium alloy molded product 11 is shown. With such a configuration, the dissimilar metal molded product 5 can be integrated with the magnesium alloy 4 without fear of causing contact corrosion of dissimilar metals.

The colored layer 9 may be formed on the entire surface or a part of the dissimilar metal molded product 5. This is to perform various decorative expressions. The coloring layer 9 may be formed by a screen printing method, a gravure printing method, or the like using a heat-resistant ink in which a polyimide varnish or the like is used as a binder and an inorganic pigment such as a phthalocyanine pigment is dispersed as a coloring agent.

Referring to FIG. 10, an aluminum foil partially formed with a nickel layer 8 and a coloring layer 9 is inserted into the molds 1 and 2 as a dissimilar metal molded product 5, and the magnesium alloy 4 is injected and integrated. An example of a dissimilar metal composite magnesium alloy molded product 11 is shown. Thus, the dissimilar metal molded product 5 includes:
In addition to the coloring layer 9, a layer made of another metal can be formed together.

When the molds 1 and 2 have a shape in which holes and openings are formed in the dissimilar metal composite magnesium alloy molded product 11, holes and openings are provided in the dissimilar metal molded product 5 in advance. By doing so, the post-processing of providing holes and openings in the dissimilar metal molded product 5 after injection casting can be omitted.

The dissimilar metal molded product 5 having the above configuration is inserted into the dies 1 and 2.

As the dies 1 and 2, those used in a die casting method or a thixomolding method (registered trademark) may be applied. As the material of the molds 1 and 2, it is preferable to use surface hardened tool steel for hot working. Further, the dies 1 and 2 may be provided with a vacuum chuck hole or a guide pin as necessary for fixing and positioning the dissimilar metal molded product 5.

It is possible to form a fine uneven pattern such as emboss, hairline, etc. on at least one of the dies 1, 2 and the dissimilar metal molded product 5. Various decorative expressions are possible (see FIG. 7).

Next, the magnesium alloy 4 is injection-cast to integrate the dissimilar metal molded product 5 and the magnesium alloy 4 as the casting metal.

As the magnesium alloy 4, an alloy containing 50% by weight or more of magnesium is preferably used. As the magnesium alloy 4 having such a composition, for example, AS
AM20, AM60, AS41, AZ specified in TM
63, AZ91, AZ92, AM100, ZC63, E
Z33, ZE41, ZK51, ZK61, ZE63, Q
E63, QE22, EQ21, WE43 and the like can be used.

The movable mold 1 is a cavity mold, the fixed mold 2 is a core mold, and a dissimilar metal molded product 5 is arranged on the movable mold 1 and clamped to form a dissimilar metal molded product 5 and a fixed mold. By injecting the magnesium alloy 4 between the mold 2 and the mold 2, the dissimilar metal molded product 5 can be integrated with the convex portion of the dissimilar metal composite magnesium alloy molded product 11 (see FIGS. 1, 4, and 5). .

Also, the movable mold 1 is a core mold, the fixed mold 2 is a cavity mold, and a dissimilar metal molded product 5 is arranged on the fixed mold 2 and clamped to move with the dissimilar metal molded product 5. By injecting the magnesium alloy 4 between the side mold 1 and the magnesium alloy 4, the heterogeneous metal molded product 5 can be integrated with the projection of the heterometallic composite magnesium alloy molded product 11 (FIGS. 2 and 5).
reference).

Further, the movable mold 1 is a core mold, the fixed mold 2 is a cavity mold, and a dissimilar metal molded product 5 is arranged on the movable mold 1 and clamped to fix the dissimilar metal molded product 5. By injecting and casting the magnesium alloy 4 between the side metal mold 2 and the dissimilar metal composite magnesium alloy molded article 11, the dissimilar metal molded article 5 can be integrated into the recess of the molded article 11 (FIGS. 3 and 6).
reference).

Further, the movable mold 1 is a cavity mold, the fixed mold 2 is a core mold, and a dissimilar metal molded product 5 is disposed on the fixed mold 2 and is clamped to be movable with the dissimilar metal molded product 5. By injecting the magnesium alloy 4 between the side mold 1 and the magnesium alloy 4, the dissimilar metal molded product 5 can be integrated with the concave portion of the dissimilar metal composite magnesium alloy molded product 11 (see FIG. 6).

As described above, the movable mold 1 and the fixed mold 2
Can be a cavity type or a core type, and the heterogeneous metal molded product 5 can be integrated with either the convex portion or the concave portion of the heterogeneous metal composite magnesium alloy molded product 11.

In the molds 1 and 2, a molded product is
It is necessary to apply a release agent in order to easily release the mold from Step 2. In the present invention, since there is no problem in releasing the dissimilar metal molded product 5 from the molds 1 and 2, the application of the release agent does not bring the dissimilar metal molded product 5 into contact with the molds 1 and 2. It can be done only for parts. By partially applying the release agent in this manner, the releasability of the dissimilar metal composite magnesium alloy molded product 11 from the molds 1 and 2 can be ensured, and the surface of the dissimilar metal composite magnesium alloy molded product 11 can be removed. Unnecessary soiling by the release agent is eliminated.

In this manner, the dissimilar metal molded product 5 having more excellent corrosion resistance than the magnesium alloy 4 is inserted into the molds 1 and 2, and the magnesium alloy 4 is injection-cast to form the dissimilar metal composite magnesium alloy molded product. By integrating the dissimilar metal molded product 5 on the surface of 11, a dissimilar metal composite magnesium alloy molded product 11 having excellent corrosion resistance can be obtained (see FIGS. 5 to 10).

[0048]

(Example 1) Molding size is 50 × 75 × 1 m
m was attached to an injection molding machine for magnesium alloy manufactured by Japan Steel Works, Ltd.

As a dissimilar metal molded product, the size is 50 × 75 ×
A 0.025 mm aluminum foil is prepared, the movable side mold is used as a cavity mold, and a different kind of metal molded article is vacuum-adsorbed and fixed. The mold is clamped. I got

The thus obtained molded article of a dissimilar metal composite magnesium alloy whose surface was covered with aluminum foil was excellent in corrosion resistance.

(Example 2) The molding size was 50 × 75 × 1
mm was attached to a magnesium alloy injection molding machine manufactured by Japan Steel Works, Ltd.

As a dissimilar metal molded product, the size is 50 × 75 ×
After preparing an indium layer having a thickness of 0.02 μm formed on a 0.025 mm aluminum foil by a vapor deposition method, and using the movable mold as a cavity mold, vacuum-adsorbing and fixing the indium layer side of the dissimilar metal molded product, The mold was clamped and the magnesium alloy AZ91D was injection-cast to obtain a dissimilar metal composite magnesium alloy molded product.

The dissimilar metal composite magnesium alloy molded article in which an indium layer was formed on the surface thus obtained and an aluminum foil was integrated thereunder had excellent corrosion resistance.

(Example 3) Molding size is 50 × 75 × 1
mm was attached to a magnesium alloy injection molding machine manufactured by Japan Steel Works, Ltd. The movable mold was a cavity mold, and its surface was finely embossed.

Using a polyimide-based varnish ink in which a phthalocyanine pigment is dispersed, a colored layer is partially formed by screen printing. The size is 50 × 75 × 0.025 m.
m as a dissimilar metal molded product, the colored layer side of the dissimilar metal molded product is vacuum-adsorbed and fixed to the movable side mold, then clamped, and the magnesium alloy AZ91D is injection-cast to form a dissimilar metal composite magnesium alloy A molded product was obtained.

The thus obtained molded product of a dissimilar metal composite magnesium alloy having an aluminum foil having a fine embossed pattern and a colored layer on the surface was excellent in corrosion resistance.

(Example 4) Molding size is 50 × 75 × 5
mm was attached to a magnesium alloy injection molding machine manufactured by Japan Steel Works, Ltd.

As a dissimilar metal molded product, an aluminum plate having a thickness of 0.5 mm pressed into a lunch box shape of 50 × 75 × 5 mm is prepared, and the dissimilar metal molded product is vacuum-adsorbed using the movable mold as a core. After fixing, the mold was clamped and a magnesium alloy AZ91D was injection-cast to obtain a dissimilar metal composite magnesium alloy molded product.

The thus obtained molded product of a dissimilar metal composite magnesium alloy in the form of a lunch box having a surface covered with an aluminum plate and integrated was excellent in corrosion resistance.

(Example 5) The molding size was 50 × 75 × 1
mm was attached to a magnesium alloy injection molding machine manufactured by Japan Steel Works, Ltd.

As a dissimilar metal molded product, the size is 50 × 75 ×
A 0.025 mm aluminum foil is prepared, and the dissimilar metal molded product is fixed by vacuum suction using the movable mold as a cavity mold, then a release agent is spray-coated only on the fixed mold, dried, and then clamped. And magnesium alloy AZ91D were injection-cast to obtain a dissimilar metal composite magnesium alloy molded product.

The thus obtained molded product of a dissimilar metal composite magnesium alloy whose surface is covered with an aluminum foil is excellent in releasability from a fixed mold, and is separated from the surface of the aluminum foil which is a dissimilar metal molded product. No stain from the mold agent was adhered. Moreover, the dissimilar metal composite magnesium alloy molded article was excellent in corrosion resistance.

[0063]

The method for producing a dissimilar metal composite magnesium alloy molded article of the present invention employs the above-described structure.
The following effects are obtained.

That is, after a dissimilar metal molded product mainly composed of a metal different from magnesium is inserted into a mold, a magnesium alloy is injected and cast to integrate the dissimilar metal molded product and the magnesium alloy. Therefore, it is possible to easily obtain a dissimilar metal composite magnesium alloy molded product as a substitute for a magnesium alloy molded product having improved corrosion resistance, which is a disadvantage thereof, while taking advantage of the advantages of the magnesium alloy molded product.

Further, since the dissimilar metal composite magnesium alloy molded article of the present invention adopts the above-described configuration, the following effects can be obtained.

In other words, since the heterogeneous metal composite magnesium alloy molded article is formed by integrally forming a heterogeneous metal molded article mainly composed of a metal different from magnesium on the surface of the magnesium alloy molded article, excellent corrosion resistance is obtained. Have

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing one embodiment of a method for producing a dissimilar metal composite magnesium alloy molded article of the present invention.

FIG. 2 is a cross-sectional view showing one embodiment of a method for producing a dissimilar metal composite magnesium alloy molded article of the present invention.

FIG. 3 is a cross-sectional view showing one embodiment of the method for producing a dissimilar metal composite magnesium alloy molded article of the present invention.

FIG. 4 is a cross-sectional view showing one embodiment of the method for producing a dissimilar metal composite magnesium alloy molded article of the present invention.

FIG. 5 is a cross-sectional view showing one embodiment of a molded article of a dissimilar metal composite magnesium alloy of the present invention.

FIG. 6 is a cross-sectional view showing one embodiment of a molded product of a dissimilar metal composite magnesium alloy of the present invention.

FIG. 7 is a cross-sectional view showing one embodiment of a molded product of a dissimilar metal composite magnesium alloy of the present invention.

FIG. 8 is a cross-sectional view showing one embodiment of a molded product of a dissimilar metal composite magnesium alloy of the present invention.

FIG. 9 is a cross-sectional view showing one embodiment of a molded product of a dissimilar metal composite magnesium alloy of the present invention.

FIG. 10 is a cross-sectional view showing one embodiment of a molded product of a dissimilar metal composite magnesium alloy of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 movable mold 2 fixed mold 3 suction hole 4 magnesium alloy 5 dissimilar metal molded product 6 gold layer 7 silver layer 8 nickel layer 9 coloring layer 10 copper layer 11 dissimilar metal composite magnesium alloy molded product

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) C22C 1/02 503 C22C 1/02 503L

Claims (14)

[Claims] The present invention is characterized in that a dissimilar metal molded product mainly composed of a metal different from magnesium is inserted into a mold and then a magnesium alloy is injected and then the dissimilar metal molded product and the magnesium alloy are integrated. For producing a dissimilar metal composite magnesium alloy molded article. 2. The method for producing a dissimilar metal composite magnesium alloy molded article according to claim 1, wherein the dissimilar metal molded article has a thickness of 1 mm or less. 3. The molded article of a dissimilar metal is made of aluminum, copper,
The dissimilar metal composite magnesium alloy according to any one of claims 1 to 2, which contains at least 50% of at least one of iron, nickel, chromium, tin, lead, zinc, indium, titanium, gold, silver, and platinum. Product manufacturing method. 4. A dissimilar metal molded product has at least one of aluminum and zinc coated on its surface in contact with a magnesium alloy.
The method for producing a molded product of a dissimilar metal composite magnesium alloy according to any one of claims 1 to 3, which has a portion containing 0% or more. 5. The method for producing a dissimilar metal composite magnesium alloy molded product according to claim 1, wherein the dissimilar metal molded product has a colored layer on the entire surface or a part thereof. 6. The method for producing a dissimilar metal composite magnesium alloy molded product according to claim 1, wherein the dissimilar metal molded product has a hole or an opening. 7. The dissimilar metal composite magnesium alloy molded article according to any one of claims 1 to 6, wherein the dissimilar metal molded article is molded into a shape approximating the outer shape of the dissimilar metal composite magnesium alloy molded article. Production method. 8. The method according to claim 1, wherein at least one of the mold and the dissimilar metal molded product has a fine uneven pattern.
The method for producing a molded article of a dissimilar metal composite magnesium alloy according to any one of the above. 9. The method for producing a dissimilar metal composite magnesium alloy molded product according to claim 1, wherein a mold release agent is applied to the mold only at a portion where the dissimilar metal molded product does not contact the inside of the mold. . 10. A dissimilar metal composite magnesium alloy molded article, wherein a dissimilar metal molded article whose main component is made of a metal different from magnesium is integrally laminated on the surface of the magnesium alloy molded article. 11. The molded article of a dissimilar metal composite magnesium alloy according to claim 10, wherein the molded article of a dissimilar metal has a thickness of 1 mm or less. 12. The dissimilar metal molded product is aluminum,
Copper, iron, nickel, chromium, tin, lead, zinc, indium, titanium, gold, silver, platinum
The dissimilar metal composite magnesium alloy molded article according to any one of claims 10 to 11, which contains 0% or more. 13. The dissimilar metal composite magnesium alloy according to claim 10, wherein the dissimilar metal molded article has a portion containing at least one of aluminum and zinc at 50% or more on a surface in contact with the magnesium alloy. Goods. 14. The dissimilar metal composite magnesium alloy molded product according to claim 10, wherein the dissimilar metal molded product has a colored layer on the entire surface or a part thereof.