JPS6313683A - Particle dispersion composite metal - Google Patents

Abstract

PURPOSE:To improve the high temp. strength and wear resistance of a member by forming the metal plated layer dispersing particles between adjoining metal substrates and joining with diffusion the space between the metal substrate and metal plated layer. CONSTITUTION:The metal plated layer 2 subjecting the particle 3 of a ceramic particle, etc. to a dispersion eutectoid is formed by metal plating of an electric Ni plating, etc. on both faces of the metal substrate 1 of an iron foil, etc. This particle dispersion plate is pressed and heated in a vacuum or inert gas, etc. after overlapping it in plural sheets to cause the diffusion reaction of the plated layer 2 each other. In this way, the laminated plate provided with a metal substrate 1, plated layer 2 and diffused joining boundary is formed. The fine particle of a ceramic particle, etc. is uniformly dispersed in the metal and a particle disperse metal plate is laminated, so the high temp. strength, wear resistance, corrosion resistance, etc. of the member are improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a particle-dispersed composite metal used for parts requiring high-temperature strength, wear resistance, and corrosion resistance, vibration-proof materials, etc.

[Conventional technology]

Conventionally manufactured particle-dispersed composite metals include: (1) particle-dispersed composite metals obtained by adding particles to molten metal and dispersing them; (2) particle-dispersed composite metals obtained by adding particles to molten metal and dispersing them during weld build-up. There are particle-dispersed composite metals obtained by this process.

[Problem that the invention seeks to solve]

The particle-dispersed composite metal described above has the following problems.

(a) The density of the particles is different from that of the molten metal, and segregation of particles occurs after solidification. That is, when the density of the particles is smaller than that of the molten metal, the particles simultaneously float to the top and are not dispersed in the bottom and center.

(10) Molten metal and ceramic particles generally have poor wettability. Therefore, the bonding force between the metal and the particles is weak.

el A gap is created at the boundary between the particle and the metal due to volumetric contraction when the molten metal solidifies.

2) Products in which particles with a low melting point such as organic polymer materials are dispersed have not been manufactured.

Furthermore, the above-mentioned particle-dispersed composite metal (2) has the following problems. In addition to the above-mentioned problems with particle-dispersed composite metals, there is another problem. Namely, the temperature during welding becomes even higher than the temperature of the molten metal in (1) K above. Decomposition of the ceramic particles occurs and the original properties of the particles are lost.

As mentioned above, the conventional particle dispersion composite metal layer particle dispersion has almost no effect, and therefore, it is currently not put into practical use.

[Means for solving all the problems] The present invention provides a plurality of metal substrates whose surfaces face each other, a metal plating layer deposited on the surface of the metal substrates and optically filled between the metal substrates, and a metal plating layer in the metal plating layer. This is a particle-dispersed composite metal complete with particles dispersed in the metal substrate and a diffusion bonding boundary provided between one metal substrate and the metal plated layer to the other metal substrate.

The particle-dispersed composite metal of the present invention uses a metal plate as a base material, and performs dispersion plating of ceramic powder on the surface to create a composite metal sheet (th).The sheets are laminated and pressurized in the atmosphere of each building. This can be obtained by forming a laminated material by producing a diffusion reaction sound due to the matrix comrades in the heated plating layer.

The present invention will be explained based on FIG.

FIG. 1 is a diagram showing a single dispersion plating material in which a plating layer 2 is formed on the surface of a metal plate 1 serving as a substrate, in this case both surfaces, and at the same time particles 5 are dispersed and co-deposited. The sheet tubular shape obtained in this way, q! Pressure and heating are performed in an RI atmosphere (atmospheric air, vacuum, reducing gas, or 8 inert gas) to cause a diffusion reaction between the plated layers 2 and form a laminate.

The substrate metal may be any desired metal or alloy, including iron-based metals, and the thickness of the substrate metal is free. For example, iron foil (minimum thickness of about 20 .mu.wL), which is currently commercially available as a new material, is used as the starting point, and the upper limit can be selected depending on the thickness.

Next, ceramic particles can be selected from many materials such as oxides, nitrides, carbides, borides, and organic polymer materials, and the size and shape of the particles are also selected depending on the purpose.

In addition, regarding the plating method, both electroplating and electroless plating (chemical plating) are possible, and the material of the plating layer is Ou.
, Fe.

You can freely select Ni, Or, etc. depending on the purpose. Furthermore, the atmosphere during pressurization and heating should be selected to be optimal depending on the type of material, and the pressure and temperature should also be selected based on the material composition.

It is set according to the purpose.

One of the features of the present invention is a composite metal in which particles with a low melting point, such as an organic polymer material, are completely dispersed, since particles can be easily dispersed at low TFC temperatures.

〔Example〕

Example 1 FIG. 2 shows a microscopic structure photograph (150x magnification) of a cross section of a particle-dispersed composite metal according to an example of the present invention, where 1 is a metal substrate and 2 is a plating layer. That is, the thickness is about 20μ
After stacking 4 particle dispersion plates (plating thickness 5, approximately 50μ5 on one side) on which fine alumina particles with an average particle size of 17μm were dispersion-co-deposited by electrolytic N1 plating on both sides of iron foil 1 of size 1, This shows the microscopic structure of the cut cross section after heat treatment for 9000.1 hours at 2Kg bar pressure (Torr), and the black parts on both sides indicate the resin for fixing the sample, the iron foil 1 and the plating layer. It can be seen that No. 2 was completely adhered, and a diffusion phenomenon occurred at each boundary. Furthermore, the alumina particles are also uniformly dispersed.

Furthermore, a high-temperature tensile test was conducted on a non-particle-dispersed composite metal prepared in the same manner as this particle-dispersed composite metal. As a result, compared to non-particle-dispersed composite metal, particle-dispersed composite metal has 3
It showed an improvement in strength of 0 to Sa*.

Example 2 The present invention was applied for the purpose of preventing wear and seizing of members used in a temperature range of 500° C. to 400° C. without lubrication. That is, a particle dispersion plate (with a thickness of about 20 μm) on which fluorinated graphite particles with an average particle size of 3 μm were dispersed and co-deposited on both sides of Ni foil by electroless N1-p plating method (plating thickness, one side 1
After stacking 7 sheets of 00μm), inert gas (Mr)
After heat treatment at 800°C for 1 hour at a pressure of 2K97 m thick, the film was finished to a thickness of 500 μm and given the desired shape.
Torr), structural members used without lubrication were fabricated.

The contact pressure of this member was 100 Kg/ly*".

As a result of using it in a case with a sliding speed of 11/BθC, N1-P
Due to the hardening of the film upon heating at 350° C. and the low JII friction coefficient due to the inclusion of fluorinated graphite, no seizure or JII wear phenomenon was observed and it exhibited excellent properties.

Note that this type of part is difficult to manufacture using other lubricating materials or surface treatments because it requires ultra-precision in terms of shape and size. Therefore, the product of the present invention is a new material with special functions.

[Effects of the Invention] The particle-dispersed composite metal of the present invention has fine particles such as oxides, carbides, silicides, borides, or organic polymer materials uniformly dispersed in the metal, and the particle-dispersed metal plate has Because it is a laminated material, it has excellent high-temperature strength, abrasion resistance, corrosion resistance, etc., and has great value as a new material.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing a part of the structure of the particle-dispersed composite metal material of the present invention, and FIG. 2 is a photograph showing a cross-sectional microscopic assembly of the particle-dispersed composite metal material of the embodiment of the present invention. . 1... Metal substrate 2... Metal plating layer 3...
Particle Sub-Agent 1) Meifuku Agent Ryo Hagiwara − Sub-Agent Atsuo Anzai

Claims (1)

[Claims] 1. A plurality of metal substrates whose surfaces face each other, a metal plating layer deposited on the surface of the metal substrates and filled between the metal substrates, particles dispersed in the metal plating layer, and metal plating from one metal substrate. A particle-dispersed composite metal comprising a diffusion bonding boundary provided between the layers and another metal substrate.