JPS61163250A - Production of wear resisting aluminium composite material - Google Patents

Abstract

PURPOSE:To improve wear resistance by heat-treating the pressure-molded material of the mixture of powder mainly composed of Al and of powder or fibers mainly composed of Ni so as to disperse the above Ni in the Al (alloy). CONSTITUTION:The powder mainly composed of Al and the powder or fibers mainly composed of Ni are mixed, and the mixture is pressure-molded and heat-treated. The particles and fibers mainly composed of Ni are dispersed in the Al or Al alloy, so that a part of the particles or fibers forms intermetallic compounds mainly composed of Al and Ni.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to improvements in a lightweight, wear-resistant composite material whose main component is aluminum and a method for manufacturing the same.

[Conventional technology 1 Aluminum is lightweight, but has relatively low hardness, so the gods proposed a wear-resistant aluminum material that improves strength by adding various elements, thereby making it lightweight. has been done. As this type of wear-resistant aluminum material, aluminum alloys to which a large amount of 3i is added in a eutectic or hypereutectic composition, and aluminum alloys to which Cu, Mo, etc. are added are known. These aluminum alloys are e.g.
(July 984 issue, page 25).

On the other hand, aluminum composite materials made of carbides such as SiC are also used in [Automotive Technology] (Vol. 37).

No. 8, 1983, p. 884).

[Problems that will be solved by the invention J] However, in the case of aluminum alloys to which f, C", Mg, etc. are added, the wear resistance is improved by 1 min. There is a problem A:
.

In aluminum composite materials that do not include carbide fibers such as Matoko and SIC, the wetting between the fibers and fulminium is not good, so the surface of the fibers to be mixed is pretreated and treated. If it is kana (), there will be no 4r.

In addition, this type of reinforced fiber eaves are relatively expensive, and as a result, aluminum composite materials made of carbide fibers such as SIC have hardly been used in industrial applications.

Therefore, an object of the present invention is to provide a method for producing a wear-resistant aluminum composite material that solves the above-mentioned problems, has sufficient wear resistance, and can be manufactured at low cost. It's about doing.

``Means for solving the problem'' The inventor of Wood M., as a result of considering the above-mentioned problem in the C51 opinion, designed a particle with 11 blades of Ni or an aluminum layer of dark blue. If an intermetallic compound is formed on the surface of dispersed particles or dispersed [1] in an aluminum alloy, an aluminum composite material that has sufficient wear resistance and is lightweight can be obtained. I discovered that. That is, the present invention has the following advantages: △Anal: 1-component powder and 1) powder or mechanical abrasion mainly composed of Ni are mixed in advance, and then pressure molded, and simultaneously or simultaneously with the silicon molding. This is a method for producing a wear-resistant T'l aluminum composite material, which is characterized by performing heat treatment after pressure molding.

When pre-mixing powder containing Au as the main component and powder b+ containing Ni as the main component, the pressure molding after mixing can be carried out, for example, by hot extrusion. Extended aluminum composite 4/J 1 to carry out continuous hot extrusion! l can be easily obtained.

Drawing C3 shows an enlarged cross-sectional view of the wear-resistant aluminum composite material obtained according to the present invention, where 1 shows the Δ alloy 71~lix, 2 shows the Ni particles, and 3 shows the intermetallic compound.

"Effect 1 In this invention, an intermetallic compound is formed between the Ni particles or fibers dispersed in the aluminum matrix and ΔU, so that the Ni particles or [1 is prefix 1!
(1) Even when (1) is applied, the intermetallic compound has high hardness and the presence of finely distributed intermetallic compounds improves the wear resistance.

[Description of Examples
; After mixing with 2, the mixed powder is hot-pressed under hydrostatic pressure 7
1 Sushi was processed into the shape of a bearing. Furthermore, the processed member was sintered in a 611 tube at 500°C. The composition of Miku[1 of the obtained member is Δm-20%3i, Δm and N
It was observed that the intermetallic compounds and unreacted Ni had a composition with a low loss distribution. For comparison, N'
A member treated in the same manner with △u-20% S1 powder without powder mixture was prepared and tested using it as a bearing together with the member of the example. The amount of wear of the bearing part of this example was as follows. It was confirmed that the amount of wear was about '115 compared to the member of the comparative example.

Example 2 FC aluminum powder, Ni powder, etc., #¥weight ratio 9
: 1 is mixed in advance, and then the mixture is mixed in advance using a so-called conform machine, which has a grooved rotating drum and a fixed end with holes formed therein, and obtains extrusion pressure by the frictional force generated when the rotating drum is full. Continuously extruded in a sieve at 300°C, A (and Ni
A long wire rod with a diameter of 10111111 was obtained.

The obtained wire rod was heated at 500°C for 2 hours to react with △fu and 3i, thereby converting Au and Ni into main components and 4
The intermetallic compound was distributed as a long material.

The hardness of the intermetallic compound layer formed inside the obtained long material is micro Vickers hardness '00-70.
It can be seen that the hardness is approximately 0, and therefore exhibits an extremely high hardness compared to the long material consisting only of EC-A holes.

A long material of this example was cut out and subjected to a II tag test using an Okoshi type abrasion tester 6. It was found that it was about 1/10.

[Effect of the Invention 1 According to the present invention, fibers, which are like particles consisting mainly of Ni and M, are dispersed in an alloy mainly composed of helion or liΔfu, and the particles Alternatively, it is possible to obtain an aluminum composite material in which at least a part of mH is an intermetallic compound mainly composed of △Ni, and the intermetallic compound itself has high hardness and also has 71 to Since it is firmly bonded to the △ bracket, it is possible to obtain an aluminum composite material with sufficient wear resistance. In addition, by adding a small amount of Ni to the △fu alloy matrix, the wear resistance can be greatly improved. Therefore, it is possible to prepare a wear-resistant bamboo-aluminum composite +A material that also has good electrical conductivity and thermal conductivity.

Further, in the manufacturing method of the present invention, since the intermetallic compound of Ni and Δ is formed by heat treatment, no special pretreatment is required for Ni particles or W4 as a reinforcing substance. Therefore, it becomes possible to manufacture the aluminum composite material 1 having sufficient wear resistance at low cost.

The present invention can be used not only for the bearings and vanes of one assembly as exemplified in the embodiment section, but also for various members in general that require wear resistance, such as rotating sliding members and gears. I would like to point out something.

[Brief explanation of drawings]

The drawing is an enlarged sectional view for explaining the state of formation of an intermetallic compound according to the present invention. In Figure 2, 1 is Ap-alloy matrix, 2 is N
i particle, 3 indicates an intermetallic compound.

Claims (3)

[Claims] (1) By mixing powder containing Al as a main component and powder or fiber containing Ni as a main component, then press-molding, and heat-treating at the same time or after the pressure-molding, Al Alternatively, particles or fibers containing Ni as a main component are dispersed in an alloy containing Al as a main component, and at least a portion of the particles or fibers contain Al.
A method for producing a wear-resistant aluminum composite material, which is an intermetallic compound mainly composed of and Ni. (2) The pressure molding is performed by hot extrusion.
A method for producing a wear-resistant aluminum composite material according to claim 1. (3) The method for manufacturing a wear-resistant aluminum composite material according to claim 2, wherein the hot extrusion is performed continuously.