JPS5814311B2 - Laminated material of zinc alloy and aluminum and its manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a metal material suitable as a wear-resistant material, and the object thereof is to create a new material that is low in cost and weight, and has properties superior to conventional wear-resistant materials. It is on offer.

Conventionally, this type of wear-resistant material has aluminum 4 parts in zinc.
Alloys containing 1% or more of copper (manufactured by Mitsubishi Metals Corporation: trade names ZAS and ZAM) are known.

However, these alloys are relatively expensive and heavy, making them inconvenient to handle.

Further, although the properties of conventional alloys are improved compared to bronze, they are still not sufficient.

The present invention has been achieved as a result of research to improve the above-mentioned conventional drawbacks, and the manufacturing method thereof is described in detail. Zinc, aluminum, and copper are charged into a crucible melting furnace so as to have a standard composition. Melt by heating in the range of 500'C to 550C.

Then, after sufficiently stirring and dissolving the solution, it is poured into a mold to form a zinc alloy plate.

Next, the above-mentioned plate material is placed in a cladding mold, and its surface is coated with flux.

The flux used here is mainly composed of ammonium chloride and calcium chloride, and the amount used is not particularly limited, as long as it coats the surface of the plate material.

By coating the surface of the plate with flux, oxidation of the surface of the plate can be prevented and the surface can be cleaned.

In this case, it is desirable to maintain the mold, the plate material, etc. at 150°C to 200°C.

Next, a predetermined amount of molten aluminum or cast aluminum alloy (hereinafter simply referred to as aluminum) is injected into the flux coated material.

As aluminum is injected, the flux melts and the covering of the plate material collapses, causing molten aluminum to come into contact with the plate material instead.

When the aluminum injection is completed, the flux floats onto the surface of the molten aluminum, which can also contribute to preventing oxidation of the aluminum surface.

Since the contact surface between the zinc alloy plate and the molten aluminum is not oxidized, it is immediately alloyed with the molten aluminum and integrated to form a laminate of the two.

Therefore, there is no fear that it will peel off from the laminated surface during use.

In this case, when the surface of the molten aluminum starts to solidify, when the surface is pressurized at about 3 to 5 kg/cyyt and solidified, the gas intervening in the molten aluminum is discharged, and after solidification, the gas causes In addition to eliminating the porosity caused by the molding process, the adhesion between the zinc alloy and aluminum becomes stronger, making it possible to form a perfect laminated material.

The volume ratio of zinc alloy to aluminum can be changed as appropriate depending on the purpose, use, etc., but is preferably in the range of 1:3 to 5.

The zinc alloy and aluminum laminate manufactured as described above are laminates in which both are completely adhered by the alloy layer and formed as one body, and the surface of the zinc alloy is the wear-resistant material surface, and the aluminum is used as the backing metal. used.

Now, the zinc alloy used in the present invention (Zn65, A120
, Cu15) and ZAM No. A comparison of the physical and mechanical properties with No. 2 is shown in the following table.

As is clear from the above table, the zinc alloy used in the present invention is ZAM No. The specific gravity is smaller than that of 2.

Therefore, by using aluminum as a backing metal, the specific gravity of the laminated material of the present invention can be halved to about 3, and the weight can be reduced.

In addition, in terms of thermal conductivity and thermal expansion coefficient, the influence of heat can be reduced compared to conventional products.

Furthermore, the mechanical properties such as tensile strength, anti-pressure, elongation and hardness are all improved and can be used particularly in parts where a high degree of wear resistance is required.

Furthermore, the laminated material of the present invention can be used as a slide plate material of a press machine, and can also be processed and formed to be used as various wear-resistant materials such as sliding parts of bearings and the like.

In this case, it goes without saying that a solid lubricant such as molybdenum disulfide, graphite, or metal oxide may be embedded in the wear-resistant surface by a conventional method.

As described above, the method of the present invention allows laminated materials of zinc alloy and aluminum to be obtained with simple operations, and the resulting laminated materials are lightweight, inexpensive, and can be used as wear-resistant materials with superior mechanical strength. can do.

Example These metal plates or lumps were placed in a crucible melting furnace and heated at 500°C to 65% zinc, 20% aluminum, and 15% copper.
Dissolve by heating at a temperature of 550°C.

Next, this is poured into a flat mold and solidified to form a plate material.

The plate material is taken out from the mold and placed in a cladding mold, and its surface is coated with a flux mainly composed of ammonium chloride and calcium chloride. (volume ratio 1:5) was gradually injected.

When the aluminum injection is completed, a molten coating of the flux is formed on the aluminum surface.

By leaving it for a while, the surface of the aluminum coated with the flux begins to solidify, and at this time a press pressure of 3 kg/cm2 is applied from the top surface to solidify the aluminum.

The material obtained as described above is a laminated material of zinc alloy on the lower side and aluminum on the upper side, and the contact surface between the two is partly alloyed and integrated, and furthermore, there is a layer of aluminum in the aluminum metal. Obtained as a high-quality laminated material with almost no cavities.

This product can be used as is as a slide plate material for pressed materials, or it can also be pressure molded and used as a bearing with a zinc alloy surface as the sliding surface.

Furthermore, by embedding a solid lubricant such as molybdenum disulfide in an area ratio of 25% to 30% in the sliding surface of the zinc alloy, not only can the sliding surface be oil-free, but its wear resistance can be doubled. It can also be made into an ideal wear-resistant material.

Claims (1)

[Claims] 1. 61.5 to 68.5 parts of zinc, 18 to 2 parts of aluminum
2 parts of zinc alloy and 13 to 17 parts of copper by volume ratio of 1 to 3 to 3 parts of aluminum or aluminum casting alloy.
5 Laminated material of zinc alloy and aluminum. 2 Zinc 61.5-68.5 parts, aluminum 18-2
Aluminum and copper are added to zinc and heated to melt so that the ratio of aluminum and copper becomes 2 parts and 13 to 17 parts of copper, and the mixture is injected into a mold and solidified as a plate.The upper surface of the plate is coated with black, and from this upper surface A method for producing a laminated material of zinc alloy and aluminum, characterized by injecting molten aluminum or aluminum casting alloy.