JPS60148688A - Production of composite material - Google Patents

Abstract

PURPOSE:To produce a composite material combined with plate materials having a large difference in deformation resistance by hot pressure welding by superposing respectively outside materials on both top and bottom surfaces of an intermediate material, disposing frame materials over the entire part of the circumferential edge to form a working material and subjecting said material to hot pressure welding then removing the frame materials. CONSTITUTION:Frame materials 4 consisting of a carbon steel are respectively disposed to both side edges and both end edges of superposed plate materials 1-3. The respective joint edges between the materials 1-3 and the materials 4 are subjected to electron beam welding in a vacuum to form weld zones 5 thereby fixing the materials 4 to the materials 1, 3. The intermediate plate material 2 is therefore enclosed over the entire part of the circumferential edge by the materials 4 and is thus retained. The working material constituted in such a way is passed through press welding rolls so that the materials 1-3 are united by hot pressure welding. The elongation of the material 2 is suppressed by the materials 4 by which said intermediate material is surely pressure-welded to the materials 1, 3. The materials 4 are disconnected thereafter by machining and the composite material is thus obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for manufacturing a composite material formed by polymerizing and press-bonding plate materials.

[Technical background of the invention and its problems]

BACKGROUND ART Composite materials, which are made by polymerizing and press-welding a plurality of plates made of different metals, are widely used in various fields because they have a predetermined function due to a combination of the properties of each metal. For example, a bimetal is a typical composite material made by polymerizing multiple plates made of metals with different coefficients of thermal expansion, and a plate made of a metal with spring properties and a plate made of a conductive metal. Composite materials that combine these are used in electrical contact springs, etc.

Generally, when manufacturing these composite materials, a cold pressure welding method is used to polymerize a plurality of strip-shaped plates, or a plurality of billet-shaped plates are polymerized, such as explosion welding, friction welding, etc.
There is a hot pressure welding method that involves hot pressure welding through welding or the like.

However, in cold pressure welding, processing must be performed at a large processing rate of 40 to 70 inches in order to pressure-weld the plates, so heavy processing is required in proportion to the finished plate thickness and width. Requires processing equipment. Furthermore, because of this, the processing equipment has a special structure and cannot be used for normal paste/rolling, so it is not versatile and has the drawback of being extremely uneconomical in terms of equipment. On the other hand, in hot pressure welding, the plates are heated and softened, so it is relatively easy to press the plates together, and it is possible to repeat the process at a small processing rate, so the processing equipment can be used as usual regardless of the finished plate thickness. Good for rolling mill scale. Moreover, from this, processing with a small processing rate can be repeatedly performed with one hot rolling mill. In addition, it has the advantage of being very economical in terms of equipment because it has versatility, such as being able to use normal rolling of a single material.

However, in composite materials, there may be large differences in deformation resistance among the metals forming each plate material. In this case, if a plate made of a metal with low deformation resistance and a plate made of a metal with high deformation resistance are stacked and pressure-welded, the former plate will elongate in the longitudinal and width directions depending on the difference in deformation resistance. becomes larger for the latter plate material. However, in the case of cold welding, there are many problems because the difference in elongation of the plate material can be adjusted by adjusting the rear tension, but in the case of hot welding,
If the elongation of a metal plate with low deformation resistance increases and a large shear occurs at the joint surface, the metal plate with low deformation resistance will have a convex warp in the rolling direction, making it difficult to pass the plate through a pressure roll. As a result, work efficiency is reduced, and pressure welding of the various plate materials becomes difficult due to effects such as temperature drop, resulting in a decrease in the yield of pressure welding processing. In particular, this tendency becomes more pronounced as the combinations have a larger difference in deformation resistance and as the workpiece becomes larger.

Therefore, when manufacturing a composite material that combines plates with large differences in deformation resistance, hot welding is difficult as described above, so cold welding is unavoidably disadvantageous in terms of equipment. is being carried out.

[Purpose of the invention]

The present invention has been made based on the above-mentioned circumstances, and provides a method for manufacturing a composite material that can easily manufacture a composite material that combines plate materials with large differences in deformation resistance by hot pressure welding processing. .

[Summary of the invention]

The method for producing a composite material of the present invention includes polymerizing outer materials on both upper and lower surfaces of an intermediate material, and arranging a frame material fixed to the outer material around the entire peripheral edge of the intermediate material to form a workpiece. The method is characterized in that the frame material is formed, hot pressure welding is performed on this workpiece, and then the frame material is removed.

The method for manufacturing a composite material of the present invention is to form a composite material as a product by using an intermediate plate made of a metal with relatively low deformation resistance and a metal with relatively low deformation resistance. A pair of outer plate materials are combined and hot rolled. The frame members made of metal are fixed to both outer side plates and arranged on both side edges and both end edges of the intermediate plate. The workpiece thus formed is passed through a pressure roller while being heated to press the intermediate plate material and both outer plate materials together. In this case, the frame material presses the peripheral edge of the intermediate plate material,
The elongation of the intermediate plate material in the longitudinal direction and the width direction is suppressed within the range of elongation of the outer plate material. For this reason, the intermediate plate does not stretch more than necessary and is securely pressed against the outer plate. Therefore, the intermediate plate material and both outer plate materials can be easily and reliably pressed together, and
Pressure welding can be performed by passing the workpiece material through the pressure roll without strain. After hot welding, the frame material is cut out from the workpiece. In this way, a composite material in which plate materials having different deformation resistances are combined is manufactured by hot welding.

In the manufacturing method of the present invention, the plate material of the intermediate layer is a single layer or multiple layers. In other words, if the intermediate plate is a single layer, three layers consisting of the intermediate plate and both outer plates
The composite material of the layers is manufactured in a single unit. When the intermediate plate material has multiple layers, it is manufactured by manufacturing a single composite material having four or more layers, or by polymerizing multiple sets of composite materials having two or more layers. Note that a material with low deformation resistance is placed in the portion that will become the intermediate plate material.

One form of the frame material is to form the frame material separately from the outer plate material, arrange it around the entire periphery of the intermediate plate material, and weld the frame material to both outer plate materials. . Another embodiment of the frame is to form the frame integrally with one or both of the outer plates and to surround the intermediate plate with the outer plates.

It should be noted that the frame material expands while being firmly fixed to the outer plate material during the hot-pressure welding process, and can suppress the elongation by pressing the intermediate layer plate material. The frame material used has a high or low deformation resistance depending on the metal of the intermediate and outer plate materials.

In addition, when welding the frame material to the outer plate material, the frame material has good weldability with the outer plate material, and the formed bead (
Use a metal with good hot workability (alloy).

[Embodiments of the invention]

1 and 2 show one embodiment of the invention.

FIG. 1 shows a three-layer Rimetal used as a product, such as a composite material, for example, in an overcurrent breaker. This bimetal is made by polymerizing plate material 1 made of an alloy of 20% nickel and manganese, 6 chi and balance iron, plate 2 made of copper, and plate 3 made of an alloy of 42% nickel and balance iron. . Note that the copper forming the intermediate plate 2 has a lower deformation resistance than the alloy forming the outer plates 1 and 3.

When manufacturing this bimetal, plate materials 1 to 3 are arranged as shown in FIG. 4 respectively.

The carbon steel forming the frame material 4 has good weldability with respect to the alloy of the plate material 1.3, and has a lower deformation resistance than these alloys. Electron beam welding is then performed in a vacuum between the joining edges of the plates 1 and 3 and the frame material 4 to form a welded portion 5, and the frame material 4 is fixed to the plates 1 and 3 by this welded portion 5. . Therefore, the entire peripheral edge of the intermediate plate 2 is surrounded and held down by the frame 4. The thus constituted workpieces are passed through a pressure roll and subjected to hot pressure welding, thereby welding each of the plate materials 1 to 3 together. In this case, the plate material 2 is restrained from elongating by the frame material 4, and is securely pressed against the plate material 1.3. After the pressure welding process, each frame member 4 is separated from the entire peripheral edge of the plate members 1 to 3 by machining, resulting in the state shown in FIG. 1. In this case, since the frame material 4 is placed in contact with the peripheral surface of the plate materials 1 to 30, by cutting the frame material 4 along the welded portion 5, only the frame material 4 can be separated. I can do it.

Therefore, when separating the frame material 4, it is not necessary to separate the plate materials 1 to 3, which is very economical.

3 and 4 show other embodiments. The composite material shown in Figure 3 is an electrical contact spring. This electrical contact spring consists of a plate 6 made of springy stainless steel and a plate 7 made of conductive nickel or copper.
It is a polymerization of When manufacturing this electrical contact spring, as shown in FIG. 4, two plates 7, 7 are overlapped in the middle, and one plate 6 is placed on each outer side to form four layers. Note that a release agent 8 is applied between the overlapping surfaces of the plate materials 7 and 7. And the polymerized plate material 7.6
, 6.7 is made of carbon steel (8841) around the entire periphery.
A frame material 4 consisting of the following is placed, and the plate materials 6, 6 and the frame material 4 are fixed together by a welded portion 5 formed by multiple electron beam welding. Next, hot pressure welding is applied to the workpiece constructed in this way,
After that, the frame material 4 is separated. Finally, the parts of the plates 6 and 7 that are in pressure contact at the upper part of the workpiece and the parts of the plates 6 and 7 that are in pressure contact with the lower part of the workpiece are separated to obtain two sets of electric contact springs. That is, two sets of electrical contact springs are manufactured together.

FIGS. 5 and 6 show other different embodiments. The composite material shown in FIG. 5 is a semiconductor paste used in semiconductor devices. This semiconductor paste is made by polymerizing a plate material 9 made of molybdenum and a thin plate material 10 made of nickel for bonding the semiconductor. When manufacturing this semiconductor paste, as shown in FIG. 6, two plates 9.9 are polymerized and the entire periphery thereof is surrounded by one plate 11 made of nickel. This is because molybdenum is very easily oxidized. The joint edges of this plate material 11 are welded at a welding part 5 by electron beam welding. The plate material 11 is a combination of the plate material 10 and the frame material, and the part that overlaps with the plate materials 9 and 9 corresponds to the plate material 10.10, and the part surrounding the periphery of the plate material 9.9 corresponds to the frame material. . The workpiece constructed in this way is subjected to hot pressure welding, and then a portion of the plate material 1 corresponding to the frame material is cut away. After that, the upper plate material 9 and the plate material 10 (plate material 1) superposed and pressure-welded thereto)
, the lower plate material 9 and the plate material 10 superimposed and pressure welded thereto (
Separate the plates into 1)) and 1). Note that a release agent 8 is applied between the overlapping surfaces of the plates 9, 9.

Note that the frame material is not limited to the arrangement shown in the embodiment, but may be sandwiched between the edges of both outer plate materials.

The present invention is applicable not only to composite materials in which plates made of metals having a large difference in deformation resistance are combined, but also to manufacturing composite materials in which plates made of metals having mutually poor weldability are combined.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to easily manufacture a composite material in which plate materials having a large difference in deformation resistance are combined by hot welding, which has been difficult in the past.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention,
Fig. 1 is a perspective view showing a composite material, Fig. 2 is a partially cutaway perspective view showing a workpiece, Figs. 3 and 4 show other embodiments, and Fig. 3 shows a composite material. 4 is a partially cutaway perspective view showing a workpiece, FIGS. 5 and 6 show other different embodiments, FIG. 5 is a perspective view showing a composite material, and FIG. 6 is a perspective view showing a composite material. The figure is a partially cutaway perspective view showing the workpiece. 1.2.3, 6, 7.9.10... Plate material, 4... Frame material, 5... Welded part, 8... Release agent. Applicant's agent Patent attorney Takehiko Suzue 13- Figure 1 Figure 2 Figure 3

Claims (8)

[Claims] (1) A workpiece is formed by polymerizing outer materials on both upper and lower surfaces of the intermediate material, and arranging a frame material fixed to the outer material on the entire peripheral edge side of the intermediate material, and forming a workpiece. A method for manufacturing a composite material, comprising subjecting the frame material to a hot pressure welding process, and then removing the frame material. (2) The method for manufacturing a composite material according to claim 1, wherein the outer material has higher deformation resistance than the intermediate material. (3) The method for manufacturing a composite material according to claim 1, wherein the frame material is a separate object from the outer material and is welded to the outer material. (4) The frame material is integral with the outer material. Claim 1
The method for manufacturing the composite material described in Section 1. (5) The method for manufacturing a composite material according to claim 1, wherein the intermediate material is a single layer. (6) The method for manufacturing a composite material according to claim 1, wherein the intermediate material has multiple layers. (7) The method for manufacturing a composite material according to claim 6, wherein the workpiece is separated into upper and lower parts using a polymerization surface of a plurality of layers of intermediate material as a separation surface. (8) The method for producing a composite material according to claim 7, wherein a release agent is interposed between the polymerized surfaces of the intermediate material that serve as the dividing surfaces.