JPS63130285A - Manufacture of high damping material - Google Patents

Abstract

PURPOSE:To obtain a high draft and a high damping material of high joining intensity by inserting the laminating plate of a super plastic alloy plate and the other alloy plate into a tubular bundling material, performing a cold rolling in the state of bundling and then performing a hot rolling. CONSTITUTION:The joining face of a super plastic alloy plate 4 performing the structure adjustment in advance and the other alloy plate 5 is mechanically subjected to a surface grinding and after removing the oxidized film the alloy plates 4, 5, 4 are piled up in three layers. On the other hand the bundling material 8 formed flatly by setting to the dimension of a laminating plate 6 in advance from a steel made pipe 7 is prepared, the laminating plate 6 is inserted into the bundling material 8 and the adhesion of the laminating plate is intended with cold rolling by a rolling mill 9 in the state of bundling. It is then heated in a heating furnace, etc., subjected to a hot rolling by a rolling mill 10 and a damping material is obtd. by removing the bundling material 8 which becomes an outer sheath after hot rolling.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a method for manufacturing a vibration damping material made by laminating a superplastic alloy plate and another alloy plate for use in vibration damping devices for equipment, piping, etc. .

[Conventional technology and its problems]

As a vibration damping material used for piping etc., for example, Japanese Patent Application Laid-Open No. 60-1
As shown in Japanese Unexamined Patent Publication No. 36639 or Japanese Utility Model Application Publication No. 108875/1987, a laminated structure of a superplastic alloy plate and another alloy plate is known.

When manufacturing vibration damping materials by face-to-face bonding of superplastic alloy plates and other alloys, conventionally the superplastic alloy plates and other alloy plates are subjected to the required surface treatment, and then each alloy plate is laminated. Next, hot rolling is performed, and after the hot rolling, necessary diffusion treatment is performed to produce a vibration damping material.

However, in the above-mentioned conventional method, the laminated material was insufficiently fixed, causing misalignment in the living room, and a high degree of processing could not be achieved.

Since hot rolling is performed immediately after lamination, an oxide film forms on the joint surfaces of the superplastic alloy sheets or other alloy sheets during heating for hot rolling, making it impossible to obtain a good joint interface. Ta.

Furthermore, although heating is performed for diffusion treatment after hot rolling, this heating generates fine holes called microvoids on the superplastic alloy side, which causes bonding failure.

This seems to be because in the case of a combination of a superplastic alloy and a superplastic alloy, an alloy with a large difference in diffusion coefficient between atoms in the metal structure is used. By the way, Zn is a superplastic alloy.
-22A alloy and Δ alloy, approximately 350
The diffusion coefficient (or atomic movement speed) at °C is several hundred times larger for Zn than for A, and microvoids are observed to occur at the bonding interface, especially on the superplastic alloy side, after diffusion treatment, which is the cause of peeling at the bonding surface. There is a possibility that it will become.

Furthermore, since the superplastic alloy is joined to other alloys without sufficient structural adjustment, there are other problems such as poor vibration damping effect.

[Purpose of the invention]

The present invention was made in view of the above-mentioned problems, and its purpose is to make it possible to obtain a good vibration damping material without bonding defects when manufacturing a damping material made of a superplastic alloy and other alloys. It is in.

[Means for solving problems]

The present invention involves stacking a superplastic alloy plate whose structure has been adjusted in advance and other alloy plates to form a laminate, inserting the laminate into a tubular restraining material, and cold-heating it in the restrained state. Rolled,
The gist is then hot rolling.

[For production]

For superplastic alloys, such as Zn-22A, the temperature is approximately 250°C.
It is a material that exhibits superplasticity at relatively low temperatures up to
If the alloy is produced by casting, many cavities will occur, and the desired characteristics cannot be expected. Therefore, the structure of the superplastic alloy plate is adjusted in advance to give it sufficient superplastic properties.

Next, a laminate consisting of the texture-adjusted superplastic alloy plate and other alloy plates is inserted into a tubular restraining material, and the plates are rolled while restraining mutual movement, so the laminate is processed. Since the laminate does not come into direct contact with the rolling rollers, it is possible to provide a high degree of processing without causing cracks. Further, since hot rolling is performed after applying a certain degree of working through cold rolling to bring the bonded surfaces into close contact, it is possible to prevent the formation of an oxide film on the bonded surfaces during heating. Furthermore, during hot rolling, a high working degree is applied to easily produce a new surface at the joint surface, so a vibration damping material with excellent joint strength can be obtained.

〔Example〕

Hereinafter, the method of the present invention will be explained based on the drawings.

Figure 1 shows the microstructural adjustment process of the superplastic alloy according to the present invention, and the second
The figure shows the manufacturing process of the damping material according to the present invention.

The structure adjustment of a superplastic alloy will be explained with reference to FIG.

A material 1 made of a superplastic alloy produced by casting is cold-rolled by a rolling mill 2 at a rolling reduction of about 10 to 30%, then heated in a heating furnace, etc., and then rolled by a rolling mill 3 to a rolling reduction of about 40 to 30%.
Hot rolling is performed at a reduction rate of 70% to eliminate voids present in the material 1. Next, it is heated in a heating furnace or the like to a temperature equal to or higher than the eutectoid point of the material 1, and then rapidly cooled by water cooling or the like.
A superplastic alloy plate 4 having characteristics as a superplastic alloy with improved material structure is obtained.

The superplastic alloy plate 4 whose structure has been adjusted as described above is used as a damping material. When the structure of the superplastic alloy is adjusted as described above, the results shown in Table 1 are obtained, and the desired characteristics are obtained. I was able to do that. In other words, it can be seen that Sample Material 2, which has undergone structure adjustment, has smaller variations in m value and is superior in elongation at break than Sample Material 1, which has not undergone structure adjustment.

Table 1 Example of change in tensile properties at room temperature Sample material 1 shown in Table 1 is z, n-2 produced by casting.
2A alloy heated to the eutectoid point temperature of 350°C and then rapidly cooled. Sample material 2 is Zn-22 produced by casting.
The alloy A was cold-rolled, then hot-rolled, heated to the eutectoid point temperature of 350° C., and rapidly cooled to perform Group II adjustment. Note that 5 pieces of each of sample materials 1 and 2 were used.

The manufacturing process of the damping material will be explained with reference to FIG.

Superplastic alloy plate 4 made of Zn-22A alloy whose structure has been adjusted in advance and AI! The joint surface of the alloy plate 5 made of an alloy is mechanically polished using a wire brush or the like to remove the oxide film, and the alloy plates 4 and 5.4 are stacked in three layers as shown in the figure. On the other hand, a restraining material 8 is prepared in advance, which is formed from a steel pipe 7 into a flat shape according to the dimensions of the laminate 6. If necessary, the tip of the pipe may be inclined by press working to facilitate introduction into the rolling mill, and the inner surface of the pipe may be cleaned of dirt by flushing or the like. The laminated plate 6 is inserted into the restraining material 8, and cold-rolled in a restrained state by a rolling mill 9, and the adhesion of the laminated plate 6 is measured by applying a rolling reduction of about 10 to 30%. Next, it is heated to about 250 to 300°C using a heating furnace or the like and hot rolled using a rolling mill 10. The rolling reduction ratio is preferably 70% or more in order to provide a high degree of workability. Repeat the number of passes multiple times as necessary. A damping material can be obtained by removing the restraining material 8 that has become the outer covering after hot rolling.

As the superplastic alloy used in the present invention, the above-mentioned Zn-2
2AJ! In addition to the alloy, A7-33Cu alloy, B1-44S
In addition to the Aff1 alloy, high yield materials such as high tensile strength steel and spring steel are used as alloys laminated thereon.

In addition, in the above embodiment, the method of manufacturing a vibration damping material laminated in three layers is described, but it may be two layers, four layers or more, and in short, the method of the present invention can be applied to a vibration damping material consisting of multiple layers. Of course, the invention may be applied and changes may be made without departing from the gist of the invention.

〔Effect of the invention〕

With the above configuration, the present invention exhibits the following effects.

(1) Superplastic alloys are used that have undergone structural adjustment, so excellent vibration damping effects can be measured.

(2) Since the laminated plates are rolled and joined within the tubular restraint material, a high degree of processing is achieved, and a vibration damping material with high joint strength can be obtained.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a process for adjusting the structure of a superplastic alloy according to the present invention, and FIG. 2 is an explanatory diagram of a manufacturing process of a damping material according to the present invention. In the figure, 1 is a material made of superplastic alloy, 2, 3, 9゜10
4 is a rolling machine, 4 is a superplastic alloy plate, 5 is an alloy plate, 6 is a laminate plate, 7 is a pipe, and 8 is a restraining material formed into a flat shape. Patent applicant Ishikawajima-Harima Heavy Industries Co., Ltd. Figure 1

Claims (1)

[Claims] A superplastic alloy plate whose structure has been adjusted in advance and other alloy plates are stacked to form a laminate, the laminate is inserted into a tubular restraint, cold rolled in the restrained state, and then heated. A method for manufacturing a damping material, which comprises rolling.