JPS6056228B2 - Manufacturing method of anti-vibration metal material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a method of manufacturing a vibration-proof metal material used in general electrical equipment and mechanical devices.

[Background of the invention]

Conventionally, various anti-vibration alloys have been used as anti-vibration metal materials, such as M
Although n-Cu and Mg-Zr are known, these materials are not only expensive, but also require consideration of molding of the material when applied to pipes, shapes, and the like.

As a countermeasure to this problem, we have previously proposed a vibration-proofing alloy that has been subjected to intergranular corrosion, but this vibration-proofing alloy has the advantage of being inexpensive and having very few restrictions on shape, since commercially available materials can be used.

On the other hand, since the damping ability of the above-mentioned vibration isolating alloy mainly depends on friction between crystal grains or collision of crystal grains, there is a disadvantage that the damping ability decreases under low strain amplitude.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for manufacturing a vibration-proof metal material that can eliminate the above-mentioned drawbacks and improve vibration-proof properties.

[Summary of the invention]

The present invention provides a method for producing a vibration-proof metal material in which a metal material is subjected to intergranular corrosion treatment, which includes filling a granular elastic material into the corroded voids generated by the corrosion treatment, and further processing such as rolling and drawing. This is a characteristic feature.

[Embodiments of the invention]

The basic idea and examples of the present invention will be explained in detail below.

Corrosion cavities in metal materials subjected to intergranular corrosion have continuous three-dimensionally extremely complex surfaces, and the thickness of these surfaces, that is, the distance between grains and adjacent grains, The distance is generally a few microns or less and extremely small.

For this reason, it is desirable that the organic damping material filled into the corrosion voids has a low viscosity, and after filling, the viscosity increases appropriately to improve the damping ability. Therefore, as the organic damping material, it is preferable to use resins having thermoplasticity, thermosetting properties, and two-component curing properties, but are not limited to these. May be used.

In addition, by applying plastic working such as rolling and drawing while the material filled in the corroded void is partially unhardened, the filling material is sufficiently filled to the inside, which improves the anti-vibration properties. It is possible to improve.

Next, an embodiment based on the above basic idea will be described.

(1) Commercially available 2024A1 plate material (thickness 2.
A material was prepared by holding at 150°C for 1 hour, quenching in water, and aging at 150°C for 3 hours.

A 2 x 20 x 26-sized specimen was processed using this material. This sample was subjected to corrosion treatment for 3 hours in an aqueous solution (90° C.) of chromic acid, potassium chromate and sodium chloride to form a corrosion layer of about 150 pm. Two such samples were impregnated with vinyl acrylic acid paint under reduced pressure of 0.5 atm. Immediately after the surface layer of one of these was hardened using a rolling mill, it was rolled using rolls maintained at a spacing of 1.8 Tgt. The above four types of samples were fixed to a cantilever beam with an effective length of 20''.

A 20 x 20 x 0.5 steel plate is attached to the tip of these samples, and it is electromagnetically driven to produce self-oscillation at the primary resonance point, and the amplitude can be adjusted by changing the excitation force. 10-
The logarithmic attenuation rate was measured by changing to 5×10−4 and 5×10−4. The measurement results are shown in the table below.
3 From the table above, it can be seen that the damping ability of the vinyl saccharide-impregnated material and the vinyl saccharide-impregnated rolled material is superior to that of the intergranular corrosion material.

Although the mechanism by which the damping capacity increases due to rolling is unknown, it is presumed that the infiltration of resin into the interior and the reduction in the thickness of the resin layer are contributing factors. 2) SB in the same manner as in the previous example
Prepare specimens with intergranular corrosion applied to the material, and test these two specimens for 6
After immersing one powder in a lead bath maintained at 00°C, it was taken out and cooled in the air.

One of these was rolled at 300° C. using cold rolls maintained at a spacing of 1.8 wgn. The logarithmic attenuation rate of the lead-impregnated material and the lead-impregnated rolled material was set to 10 as described above.
-4 strain amplitude was measured. The results are as follows. Lead-impregnated material 14×10-2 Lead-impregnated rolled material 19
×10−2 From these results, it was confirmed that the lead-impregnated material and the lead-impregnated rolled material had better damping characteristics than the intergranular corrosion material.

Note that the vibration-proof metal material obtained in this example has good surface stability because the filler material does not peel off.

Effects of the Invention] As explained above, according to the present invention, the vibration characteristics can be improved by improving the damping ability under low distortion vibration.

Claims (1)

[Claims] 1. A method for producing a vibration-proof metal material in which a metal material is subjected to intergranular corrosion treatment, characterized in that the corrosion voids generated by the corrosion treatment are filled with a monoviscous substance, and further processing such as rolling and drawing is performed. A method for manufacturing anti-vibration metal materials.