JPH05171316A - Flexing member for damper - Google Patents

Abstract

PURPOSE:To provide a flexing member for damper which is excellent in the strength, vibration proof and environmental resistance. CONSTITUTION:Copper alloy having a composition consisting of, by weight, 0.5-6.0% of one or two or more elements selected from the element group consisting of 0.5-4.5% Fe, 0.5-5.5% Ni, and 0.5-4.5% Sn, and the balance copper with inevitable impurities, is formed. This copper alloy is characterized in that its grain size is 15mum or less.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a vibration absorbing ability for fixing a duct or the like placed under severe environmental factors such as temperature, pressure and humidity to a building wall or fixing the ducts to each other. The present invention relates to a bending member for a damper.

[0002]

2. Description of the Related Art A fixing device for fixing a duct or the like placed under severe environmental factors such as temperature, pressure and humidity to a building wall or the like has a damper having a vibration absorbing ability to prevent vibration noise. A member for a damper is used, and an elastic-plastic damper member utilizing the elastic-plastic deformation of the metal itself has been put into practical use as the damper member. However, in this elasto-plastic damper member, the frequency range of vibration that can be absorbed is limited depending on the material of the metal material used, so it is necessary to use various damper members properly according to the application, It was also disadvantageous in terms of cost. For this reason, as the damper member, a damper bending member formed by corrugating a metal material has been used. This bending member for damper absorbs vibration by elasto-plastic deformation of its corrugated portion, and its vibration absorption ability is not influenced by the material of the metal material, and therefore the metal material can be selected from a wide field of view. was there.

[0003]

By the way, conventional metal materials such as ordinary steel (for example, SS-490) and phosphor bronze alloys have been conventionally used for the bending member for the damper. In both cases, the strength and vibration fatigue resistance (hereinafter abbreviated as vibration resistance) required of the bending member for the damper are all.
Or it was inferior in environmental resistance.

[0004]

The present invention has been made as a result of intensive studies in view of such a situation, and an object of the present invention is to provide a damper excellent in strength, vibration resistance and environment resistance. To provide a bending member. That is, the invention of claim 1 includes Ti 0.5 to 4.5 wt% and further Fe 0.5 to 4.
5 wt%, Ni 0.5-5.5 wt%, Sn 0.5-4.5 wt% One or more elements in total 0.5-6.0 wt
%, The balance is made of a copper alloy composed of Cu and unavoidable impurities, and the crystal grain size of the copper alloy is 15 μm or less.

Further, the invention of claim 2 is Ti 0.5 to 4.5 wt%
In addition, Fe 0.5-4.5 wt%, Ni 0.5-5.5 wt%
%, Sn 0.5 to 4.5 wt%, one or more elements from 0.5 to 6.0 wt% in total, and Zr0.005 to
0.3 wt%, Cr 0.005 to 0.35 wt%, Y 0.005 to 0.05 wt
%, La 0.005 to 0.05 wt%, V 0.005 to 0.1 wt%, Nb
It is composed of a copper alloy containing 0.005 to 0.5 wt% of one or more elements in total from the 0.005 to 0.05 wt% element group and the balance Cu and unavoidable impurities, and the grain size of the copper alloy is 10 μm or less. It is a bending member for a damper, which is characterized in that

The invention according to claim 3 is such that Ti 0.5 to 4.5 wt%
In addition, Fe 0.5-4.5 wt%, Ni 0.5-5.5 wt%
%, Sn 0.5-4.5 wt% element group, one or more elements in total 0.5-6.0 wt% is included, and Mg 0.005
~ 0.50 wt%, Mn 0.01 ~ 1.0 wt%, Zn 0.05 ~ 2.0 wt%
0.005〜 in total of one or more elements from the element group
A bending member for a damper, which is made of a copper alloy containing 3.5 wt% and the balance of Cu and inevitable impurities, and the crystal grain size of the copper alloy is 15 μm or less.

The invention of claim 4 is such that Ti 0.5 to 4.5 wt%
In addition, Fe 0.5-4.5 wt%, Ni 0.5-5.5 wt%
%, Sn 0.5 to 4.5 wt% element group, or one or more elements in total, containing 0.5 to 6.0 wt%, and Mg 0.005
~ 0.50 wt%, Mn 0.01 ~ 1.0 wt%, Zn 0.05 ~ 2.0 wt%
0.005〜 in total of one or more elements from the element group
Includes 3.5 wt% Zr 0.005-0.3 wt%, Cr 0.005
~ 0.35wt%, Y 0.005 ~ 0.05wt%, La 0.005 ~ 0.05wt
%, V 0.005 to 0.1 wt%, Nb 0.005 to 0.05 wt%, and a total of one or more elements 0.005 to 0.5 wt%
%, The balance is made of a copper alloy composed of Cu and unavoidable impurities, and the crystal grain size of the copper alloy is 10 μm or less.

[0008]

The function of Ti, which is the main component of the alloy constituting the invention member of claim 1, reacts with Cu to form a Cu—Ti compound at a high density and finely, thereby improving strength and vibration resistance. To fulfill. The composition range is 0.5 to 4.
The reason why the content is limited to 5 wt% is that if the amount is less than the above limit value, the amount of the compound is insufficient and sufficient performance for strength and vibration resistance cannot be obtained. This is because the properties that are generated and are important for the bending member for the damper, such as environment resistance, are deteriorated. Next, the reason why the Cu-Ti alloy further contains at least one element from the element group of Fe, Ni, and Sn is that Cu-Ti-based compounds, Cu-Ti-Fe-based compounds, and Cu- A Ti-Ni-based compound, a Cu-Ti-Sn-based compound, or a composite compound of these compounds is formed in high density and finely to form the Cu-
The reason is that the effect obtained by the Ti-based compound is further increased, and the reason why each element of Fe, Ni, Sn and the total amount of the elements are limited as described above is the same as in the case of Ti.

According to the invention member of claim 2, the alloy constituting the invention member of claim 1 further contains at least one of the above-mentioned element groups such as Zr as an auxiliary component, and has a crystal grain size.
It is composed of an alloy adjusted to 10 μm or less. Thus, the auxiliary component is Cu containing Ti as a main alloying component.
This serves to further reduce the grain size of the alloy material, which significantly enhances the vibration resistance of the bending member for a damper. Further, the above-mentioned sub-components form a dense surface oxide film with good adhesion in the environment of use, and serve to prevent the strength and vibration resistance of the bending member for damper from being deteriorated due to peeling of the oxide film on the surface. Is. The reason why the content of each element of the subcomponents or the total thereof is limited as described above is that when the content is less than the above-mentioned limit value, the above-mentioned grain refinement and the formation action of a dense oxide film are sufficient. If the above-mentioned limit value is not exhibited, the flowability of the molten metal at the time of casting is lowered, and a large amount of gas is contained in the molten metal, so that casting defects and rolling defects are likely to occur. is there.

The invention member according to claim 3 is constituted by an alloy in which at least one element of Mg, Mn and Zn is further added to the constituent alloy of the invention member according to claim 1. As already known (Japanese Patent Laid-Open No. 60-158650), each element of Mg, Mn, and Zn has a function of trapping an S element that inhibits hot workability and improving hot workability. In addition to this, Cu-T by suppressing the oxidation of Ti element
It serves to more efficiently form compounds such as i-based compounds and Cu-Ti-Fe-based compounds. Also, in the environment of use, it forms a dense oxide film with good adhesion on the surface of the bending member for damper, prevents the expansion of oxidation due to peeling of the oxide film, and prevents the deterioration of strength and vibration resistance.
Further, each element of Mg, Mn, and Zn also has a function of maintaining the soundness of the joint between the bending member for damper and the dissimilar metal material. The reason why the contents of each element of Mg, Mn, and Zn and the total content thereof are limited as described above is that the effect is not sufficiently exerted when the content is less than the above-mentioned limit value, and the content at the time of casting is exceeded when the above-mentioned limit value is exceeded. This is because the flowability of the molten metal is lowered and a large amount of gas is contained in the molten metal, so that casting defects and rolling defects are likely to occur.

The invention member according to claim 4 is constituted by an alloy which constitutes the invention member according to claim 3 and further contains the subcomponent used in claim 2 to adjust the grain size to 10 μm or less. Is. The action of this subcomponent and the reason for limiting the composition range are the same as in the case of the invention member of claim 2. The reason why the grain sizes of the constituent alloys of the invention members of claims 1 and 3 are limited to 15 μm or less, and the grain sizes of the invention members of claims 2 and 4 are limited to 10 μm or less, respectively. This is because if it exceeds the above-mentioned limit value, the vibration resistance, stress relaxation resistance and the like are sharply lowered. still,
The crystal grain size of the above alloy is naturally adjusted to 15 μm or 10 μm or less, respectively, by the usual production method.

[0012]

EXAMPLES The present invention will be described in detail below with reference to examples. Example 1 Of the alloys having the compositions shown in Table 1, alloys No. A to N were melted and cast into ingots, and the ingots were hot-rolled at 950 ° C. to obtain rolled materials having a thickness of 10 mm. Done Next, after surface-grinding the rolled material, it was cold-rolled into a plate having a thickness of 0.8 mm. After that, this plate material is subjected to intermediate heat treatment at 850 ° C x 60 seconds, quenched from the heat treatment temperature, pickled and polished, and then cold rolled to a plate thickness of 0.5 mm. The plate material was heat-treated at 450 ° C. for 2 hours to prepare a test material. Comparative Example 1 In Example 1, NoB among the alloys shown in Table 1,
For the D, G, and K alloys, test materials were prepared by the same method as in Example 1 except that the intermediate heat treatment of 0.8 mm thick plate material was performed at 930 ° C. for 0.5 hours at a higher temperature than usual for a long time. did. Comparative Example 2 In Example 1, NoO to R of the alloys shown in Table 1 were used.
A test material was produced by the same method as in Example 1 except that the alloy of No. 1 was used. Conventional Example 1 In Example 1, among the alloys shown in Table 1, NoS, T
A test material was produced by the same method as in Example 1 except that the alloy of No. 1 was used. The tensile strength, vibration resistance, and environment resistance of each of the test materials thus obtained were investigated. The results are shown in Table 2 together with the grain size. The tensile test is
It was performed according to JIS-Z2241. For vibration resistance, a strip of 10 mm in width and 100 mm in length was cut out from the test material, the center part was bent 90 degrees with a curvature of 5 mm, one end was fixed, and the other end was subjected to bending vibration with an amplitude of 30 mm and a cycle of 0.1 seconds. It was repeatedly given and tested. The maximum test time was 24 hours, and the time until breakage was shown. The environmental resistance was evaluated by a stress relaxation test and a corrosion resistance test. For the stress relaxation test, a strip of 10 mm in width and 200 mm in length was cut out from the test material, and the strip was bent at a load stress of 500 N / mm ² and held at 150 ° C for 500 hours, and then loaded. The amount of bending remaining after the stress was released was calculated as a percentage. Corrosion resistance test was carried out on the same strip as used in the vibration test, “Keep it in salt water spray of 10% NaCl for 15 minutes → in 100% RH atmosphere at 40 ° C.
A corrosion cycle of "hold for 30 minutes → hold for 60 minutes in a 30% RH atmosphere at 80 ° C" was repeated 30 times, and then a vibration test was performed under the same conditions as described above for evaluation.

[0013]

[Table 1]

[0014]

[Table 2]

As is clear from Table 2, the bending member for a damper (Sample Nos. 1 to 14) of the present invention has tensile strength, vibration resistance, and
Good results were shown in all test items of stress relaxation characteristics and corrosion resistance. On the other hand, the comparative example products No. 15-18
Since the heat treatment of the 0.8 mm-thick plate material was carried out at a higher temperature than usual for a long time, the grain size exceeded 15 or 10 μm, and as a result, the vibration resistance and the stress relaxation resistance were particularly deteriorated. In addition, since the content of Ti was less than the limited value in No. 19 of the comparative example product, the properties were generally low. Further, No. 20 had a high tensile strength because the content of Ti exceeded the limit value, but a large amount of Cu-Ti compound was formed and the vibration resistance, stress relaxation resistance, and corrosion resistance deteriorated. In addition, No21 had Mn and Mg contents exceeding the limits, and No22 had V and Nb contents exceeding the limits, which deteriorated the flowability of the molten metal and caused no gas in the molten metal. A large amount was absorbed and the castability deteriorated, and in both cases, cracking occurred during casting or hot working, and the test material could not be obtained. Further, the conventional materials No. 23 and 24 had extremely low vibration resistance, stress relaxation resistance and corrosion resistance as compared with the bending member for a damper of the present invention, and also had insufficient tensile strength.

[0016]

[Effect] As described above, the bending member for a damper of the present invention is excellent in strength, vibration resistance, and environment resistance, and can absorb various vibrations having different frequencies, and has a remarkable industrial effect. Play.

Claims (4)

[Claims] 1. Including 0.5 to 4.5 wt% of Ti and further Fe
0.5-4.5 wt%, Ni 0.5-5.5 wt%, Sn 0.5-4.5 wt%
% Or more of one or more elements in total from 0.5%
A bending member for a damper, comprising a copper alloy containing 6.0 wt% and a balance of Cu and unavoidable impurities, wherein the crystal grain size of the copper alloy is 15 μm or less. 2. Ti 0.5-4.5 wt% is included, and further Fe
0.5-4.5 wt%, Ni 0.5-5.5 wt%, Sn 0.5-4.5 wt%
% Or more of one or more elements in total from 0.5%
6.0 wt% included, Zr 0.005 to 0.3 wt%, Cr 0.005
~ 0.35wt%, Y 0.005 ~ 0.05wt%, La 0.005 ~ 0.05wt%
%, V 0.005 to 0.1 wt%, Nb 0.005 to 0.05 wt%, and 0.005 to 0.5 wt in total of one or more elements.
%, The balance is made of a copper alloy consisting of Cu and unavoidable impurities, and the grain size of the copper alloy is 10 μm or less. 3. Fe containing Ti 0.5-4.5 wt%, and Fe
0.5-4.5 wt%, Ni 0.5-5.5 wt%, Sn 0.5-4.5 wt%
% Or more of one or more elements in total from 0.5%
Including 6.0 wt%, Mg0.005-0.50 wt%, Mn0.01
〜1.0 wt%, Zn 0.05-2.0 wt%, 0.005 to 3.5 wt% total of one or more elements from the element group, balance C
A bending member for a damper, which is composed of a copper alloy containing u and unavoidable impurities and has a crystal grain size of 15 μm or less. 4. Ti 0.5 to 4.5 wt% is included, and Fe is further included.
0.5-4.5 wt%, Ni 0.5-5.5 wt%, Sn 0.5-4.5 wt%
% Or more of one or more elements in total from 0.5%
Including 6.0 wt%, Mg 0.005-0.50 wt%, Mn0.01
-1.0 wt%, Zn 0.05-2.0 wt%, and one or more elements in total 0.005-3.5 wt%, and further Z
r 0.005 to 0.3 wt%, Cr 0.005 to 0.35 wt%, Y 0.005
~ 0.05wt%, La 0.005-0.05wt%, V 0.005-0.1wt%
%, Nb 0.005 to 0.05 wt%, a total of 0.005 to 0.5 wt% of one or more elements from the element group, and the balance Cu and inevitable impurities. A bending member for a damper, which is 10 μm or less.