JP2002348660A - Method for manufacturing product of magnesium or magnesium alloy - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing products of magnesium or magnesium alloys, which can inexpensively impart them the equivalent corrosion resistance to those with high purity magnesium of 99.9999%, and employ inexpensive magnesium or magnesium alloys including impurities. SOLUTION: The method for manufacturing products of magnesium or magnesium alloys comprises a step of working magnesium or the magnesium alloys into a product shape, and a step of forming a magnesium vapor-deposited layer on the surface of the workpiece manufactured in the working step, with a vapor deposition method employing magnesium or the magnesium alloy as a vapor depositing metal, in a vacuum condition with an atmospheric pressure of 1 or lower and at 650 deg.C or lower.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for producing magnesium and magnesium alloy products.

[0002]

2. Description of the Related Art Conventionally, magnesium and magnesium alloy products are processed into product shapes and then subjected to surface treatments such as chemical conversion treatment, plating and painting.

[0003]

SUMMARY OF THE INVENTION Conventional magnesium,
The surface treatments such as chemical conversion treatment, plating and painting of magnesium alloy products are troublesome and costly, and have the drawback that sufficient corrosion resistance cannot be improved.

The present invention has been made in view of the above-mentioned conventional drawbacks,
Magnesium and magnesium alloy products that can improve corrosion resistance equivalent to the case of using 99.9999% high-purity magnesium at low cost, and can use magnesium or magnesium alloy containing inexpensive impurities. The purpose of the present invention is to provide a manufacturing method.

The above and other objects and novel features of the present invention will become more completely apparent when the following description is read in conjunction with the accompanying drawings. However, the drawings are merely for explanation and do not limit the technical scope of the present invention.

[0006]

In order to achieve the above-mentioned object, the present invention provides a processing step of processing a product shape using magnesium or a magnesium alloy, and a pressure of 1 atm for the processed product processed in the processing step. Hereinafter, a method of manufacturing a magnesium or magnesium alloy product is constituted by a magnesium deposition step of forming a magnesium deposition layer on a surface by vapor deposition using a magnesium or magnesium alloy as a deposition metal in a vacuum at a temperature of 650 ° C. or less. .

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings.

In the first embodiment of the present invention shown in FIGS. 1 to 5, reference numeral 1 denotes a processing step of manufacturing a processed product 2 by processing into a product shape using magnesium or a magnesium alloy. In this method, the metal is processed into a product shape by a conventionally used processing operation such as die casting or machining.

Reference numeral 3 denotes a magnesium vapor deposition step in which the processed product 2 processed in the processing step 1 is formed of magnesium and a magnesium alloy as a vapor deposition metal 4 to form a magnesium vapor deposition layer 5 on the surface by vapor deposition. As shown in FIG. 4, the vapor deposition of magnesium is carried out according to the relationship between the atmospheric pressure and the temperature of the vapor-deposited metal 4 obtained by the present inventor based on the experimental results. The vapor deposition is performed in a vacuum at a pressure of 1 atm or less, preferably 10-3 to 10-7 mmHg, and at a temperature of 650 ° C or less.

As shown in FIG. 5, a vacuum evaporation furnace main body 9 in which a vacuum evaporation chamber 8 having an opening / closing door 7 which can be evacuated by a vacuum pump 6 is formed, as shown in FIG. The deposited metal 4 provided in
Using a vapor deposition device 12 composed of an electric furnace 10 for heating to about 50 ° C. and a processed product support 11 for supporting the processed product 2 so that pure magnesium 4a evaporated from the electric furnace 10 is deposited. Do it.

In the magnesium and magnesium alloy product 13 manufactured by the above-described method for manufacturing a magnesium and magnesium alloy product, since the magnesium deposition layer 5 of pure magnesium is formed on the surface of the processed product 2, 9
Corrosion resistance equivalent to 9.9999% magnesium is obtained. Therefore, the processed product 2 can be made of inexpensive magnesium or magnesium alloy containing impurities, and can be manufactured at low cost.

[0012]

Next, different embodiments of the present invention shown in FIGS. 6 to 10 will be described. In addition,
In the description of the different embodiments of the present invention, the same components as those in the first embodiment of the present invention are denoted by the same reference numerals, and redundant description will be omitted.

In the second embodiment of the present invention shown in FIGS. 6 to 10, the main difference from the first embodiment of the present invention is that the processed product 2A formed by die casting is in a vacuum state. It is housed in the deburring chamber 14, and a projection material 15 formed of magnesium or a magnesium alloy is projected on the processed product 2 </ b> A by a projector 17 using an impeller 16,
Removal of burrs and generation of vaporized magnesium 4a by heat due to impact and friction between the projectile 15 and the impeller 16,
The method of manufacturing a magnesium or magnesium alloy product using the magnesium vapor deposition step 3A is different from the magnesium vapor deposition step 3A in which the vaporized magnesium 4a is vapor-deposited on the surface of the processed product 2A to form the magnesium vapor deposition layer 5. By using this, the removal of burrs of the processed product 2A and the formation of the magnesium vapor deposition layer 5 can be performed simultaneously.

The magnesium vapor deposition step 3A is performed using a deburring vapor deposition apparatus 18 shown in FIGS. This deburring vapor deposition step 18 includes a case body 20 having an opening / closing door 19 capable of evacuating the deburring chamber 14 by the vacuum pump 6 and a mesh-like body through which the blast material 15 provided in the case body 20 passes. And a projector 17 using an impeller 16 provided in the case body 20 so that the projectile 15 can be projected onto the processed product 2A supported by the processed product support 21.
And a projecting material supply device 22 for supplying the projecting material 15 to the projector 17.

In each of the embodiments of the present invention, the description has been given of the vacuum deposition. However, the present invention is not limited to this, and a pure magnesium vapor deposition layer may be formed on the surfaces of the processed products 2 and 2A by electron beam vapor deposition. Good.

[0016]

As apparent from the above description, the following effects can be obtained in the present invention.

(1) A processing step of processing into a product shape using magnesium or a magnesium alloy, and the processed product processed in this processing step has a pressure of 1 atm or less and a temperature of 65 atm.
Magnesium in a vacuum of 0 ° C. or less, a magnesium vapor deposition step of forming a magnesium vapor deposition layer on the surface by vapor deposition using a magnesium alloy as a vapor deposition metal, so that the magnesium vapor deposition layer becomes pure magnesium,
Corrosion resistance equivalent to high-purity 99.9999% magnesium is obtained. Therefore, it can be sufficiently used for metal products in fields where corrosion resistance was not used due to a problem.

(2) According to the above (1), it is not necessary to use high-purity magnesium or magnesium alloy as a processed product, and it is possible to manufacture a magnesium or magnesium alloy product with an inexpensive material.

(3) According to the above (1), a pure magnesium vapor-deposited layer is formed on the surface of a processed product processed with magnesium or a magnesium alloy. Therefore, when recycled, it does not contain impurities and can be easily recycled. It can be used.

(4) Claim 2 has the same effect as (1) to (3).

[Brief description of the drawings]

FIG. 1 is a process chart of a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the processed product according to the first embodiment of the present invention.

FIG. 3 is a cross-sectional view of a product having a magnesium vapor-deposited layer formed thereon.

FIG. 4 is an explanatory diagram showing the relationship between the atmospheric pressure and the temperature of magnesium.

FIG. 5 is an explanatory diagram of a vapor deposition device according to the first embodiment of the present invention.

FIG. 6 is a process chart of a second embodiment of the present invention.

FIG. 7 is an explanatory view of a processed product according to a second embodiment of the present invention.

FIG. 8 is a cross-sectional view of a product having a magnesium vapor-deposited layer formed thereon.

FIG. 9 is a sectional view of a deburring deposition apparatus according to a second embodiment of the present invention.

FIG. 10 is a front view of a deburring deposition apparatus according to a second embodiment of the present invention.

[Explanation of symbols]

1: processing step, 2A: processed product, 3: magnesium deposition step, 4: metal deposition, 5: magnesium deposition layer, 6: vacuum pump, 7: door, 8: vacuum deposition chamber, 9: vacuum deposition furnace Body, 1
0: electric furnace, 11: processed product support, 12:
Vapor deposition device, 13: magnesium, magnesium alloy product, 14: deburring room, 15: projectile material, 16: impeller, 17: projector, 18: deburring vapor deposition device, 19: opening / closing door, 20: case body, 21: Processed product support 22: Projectile material supply device.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4K029 AA02 BA01 BA21 BC01 CA01 CA17 DB03 DB04 DB17 JA01

Claims (2)

[Claims] 1. A processing step of processing a product shape using magnesium or a magnesium alloy, and a pressure of a pressure of 1 atm or less and a temperature of 650 ° C. of a processed product processed in the processing step.
A magnesium vapor deposition step of forming a magnesium vapor deposition layer on the surface by vapor deposition using magnesium or a magnesium alloy as a vapor deposition metal in a vacuum as described below. 2. A processing step of processing into a product shape by die casting using magnesium and a magnesium alloy, and the processed product processed in this processing step is housed in a deburring chamber in a vacuum state. The formed blasting material is projected onto the processed product with a projector using an impeller to remove burrs and generate magnesium vaporized by heat due to the impact and friction of the projected material and the impeller, and the vaporized magnesium is deposited on the surface of the processed product A magnesium vapor deposition step of forming a magnesium vapor deposited layer.