JPH0328985B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to a method for assembling materials and a method for rolling the same when manufacturing a clad plate by a rolling method. [Prior art] When manufacturing a clad plate by rolling, if the base material and the laminate material can be welded, for example, Japanese Patent Laid-Open No. 1983-
As in No. 95790, weld the area around the surfaces where both will be joined. However, when the base material and the mating material are difficult to weld, for example, in the case of titanium or zirconium and steel, aluminum and steel, or copper and steel, the assembly structure of the materials becomes complicated. In such cases, special public relations
The Sanderch structure shown in Japanese Patent Laid-open No. 15306 and the more complicated Sanderch structure shown in Japanese Patent Application Laid-Open No. 60-203378 are used. Such a sandwich structure is expensive, and the separation agent inserted into the position where separation is planned after rolling may infiltrate the surface to be joined, degrading the joining performance. Furthermore, the surface of the laminate remains uneven even after rolling, and a large amount of cutting is required to achieve a smooth finish. [Problems to be Solved by the Invention] An object of the present invention is to simplify the method of assembling a raw material for a rolled cladding in which the base material and the cladding material are a combination of materials that are difficult to weld directly. A second objective is to obtain a plate with a smooth surface of the laminated material as rolled. [Means for solving the problems] The present invention is configured as follows. (1) A base material as a cladding material and a laminate material that is difficult to weld with the base material are brought together at the surfaces to be joined, and the peripheries of the surfaces to be joined are welded to the base material and the laminate material, respectively. This is a manufacturing method for a clad plate in which the clad plate is surrounded by a ready-made clad material containing available materials, the base material and the cladding material are assembled by welding through the ready-made clad material, and this is heated and rolled. The method for producing a clad plate according to (1) above, characterized in that the clad plate is covered and reinforced with a reinforcing material so that it is not exposed to The height of the protrusion is more than 1.3 times the diameter of the intake hole that communicates the inside of the base material with the surface to be joined, and the amount of reduction in the first pass of rolling with the intake hole at the rear is This is the method for manufacturing a clad plate according to (2) above, characterized in that the protrusion height is greater than the protrusion height of the clad plate. [Function] The present invention will be explained in detail below. FIG. 1 is a plan view of a rolled clad material assembled according to the present invention, and FIG. 2 is a cross-sectional view taken along line A-A in FIG. The laminating material 2
is surrounded by a ready-made clad material 3 which is already clad and can be welded to both the base material and the laminate material, and the base material 3-1 of the ready-made clad material 3 is connected to the base material 1 and the ready-made clad material 3. The laminate material 3-2 is welded to the laminate material 2 at 4 and 4', respectively, to fix the laminate material 2 and the base material 1. FIG. 3 shows a longitudinal section of another example of the rolling cladding material of the present invention.
After assembling as shown in the figure, the surrounding ready-made cladding material 3 is surrounded and reinforced with a material 5 made of approximately the same material as the base material, for example. This reinforcing material 5 is joined to the base material 1 by a welded portion 6. This reinforcing material 5 prevents the bonding strength of the ready-made cladding from decreasing due to overheating during heating or reaction with the atmosphere, and allows the laminate material 2 to be firmly fixed to the base material 1.
FIG. 4 shows a longitudinal section of yet another example of the rolling cladding material of the present invention, and the surrounding ready-made cladding materials 3 (3-1, 3-2) are shown in FIGS. Although the direction is different from the example, the point that this base material 3-1 and the base material 1 of the raw material are welded, and this laminate material 3-2 and the laminate material 2 of the raw material are welded is shown in Figures 2 to 3.
It has the same functionality as the figure. In Fig. 4, the surrounding reinforcing material 5 protrudes from the surface of the laminate 2 by a height H, and the four circumferences of the laminate 2 are also fixed at the same time, and in the first rolling pass, the protruding portion is rolled onto the surface of the laminate. to,
Most preferably, the laminate is rolled until the surface is slightly rolled. At this time, the suction nozzle 7 and suction hole 7' used to reduce the pressure on the surface to be joined are placed at the rear during rolling. By doing this, the boundary 6' between the reinforcing material 5 and the base material 1 becomes even stronger, and the laminate material 2 undergoes rolling from the second pass onward while being firmly caught by the base material 1. Separation of the two can be prevented. Furthermore, at the beginning of rolling, especially during cross rolling, the suction pipe 7 is likely to break and air can easily enter the surface to be joined. After the reinforcing material 5 is compressed, the reinforcing material 5 is strongly compressed to close the intake hole 7' immediately below it, thereby preventing air from entering. In order to completely close the intake hole 7' in only the first pass, H should be 1.3 times or more the diameter of the intake hole 7'. In the method of the present invention, four-circumferential cladding material 3 and base material 1
Since the welding material 2 and the welding material 2 are made of the same material, no welding problems occur. The welded portions 4, 4' can isolate the surface to be joined from the outside, and at the same time, the laminate material 2 and base material 1 can be integrated. When welding the surrounding cladding materials together, welding defects may occur at the joints of the cladding materials, but it is best to mechanically seal these areas by drilling holes and driving in plugs. Assuming that the airtightness is insufficient, strong oxidizing metals such as titanium or aluminum should be placed close to the mechanical sealing position, or mechanical sealing should be performed using these strong oxidizing metals as plugs. It's good to do that. [Examples] Table 1 shows examples of the present invention. Example 1 is the material assembly structure shown in Figure 2, and the welded part is not damaged and the entire thickness is

[Table] 32mm material was rolled to 8.6mm. The bonding performance after rolling was tested according to the shear test method specified in JIS G3603 and was good. Example 2 has the material assembly structure shown in FIG. 4, and is reinforced with a reinforcing material.
In the first rolling pass, the reinforcing material portion was reduced by 8 mm, and the base material and laminate portions were reduced by a total of 1 mm. It is known from another test piece investigated after one pass rolling that the suction hole 7' having a diameter of 5 mm was closed in this one pass. Further, the bonding performance after rolling was performed in the same manner as in Example 1 and was good. Moreover, in each example, the surface of the laminated material was rolled with rolls and was smooth. [Effects of the Invention] As described above, a clad material in which the cladding material and the base material cannot be directly welded can be manufactured using the simple structure of the present invention without using a complicated and expensive sandwich structure. The method of the present invention can be applied not only to the clad plates of titanium and steel as exemplified, but also to clad plates of many other metals that can be rolled. Further, according to the present invention, it is possible not only to join a laminate material to one side of a base material, but also to join laminate materials to both sides of a base material by the same method.

[Brief explanation of the drawing]

1 to 4 are explanatory diagrams of embodiments of the present invention, in which FIG. 1 is a plan view of the clad assembly material, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIGS.
The figure is a cross-sectional view when a reinforcing material is used. 1: Base material, 2: Laminating material, 3: Ready-made clad material,
3-1: Base material of ready-made cladding material, 3-2: Laminating material of ready-made cladding material, 4: Welded part between base material and base material of cladding material, 4': Welding part of cladding material and cladding material Welded part, 5: Reinforcing material, 6: Welded part of base metal and reinforcing material, 7: Suction nozzle, 7': Suction hole, H: Projection height of reinforcing material from the surface of the laminated material.

Claims (1)

[Scope of Claims] 1. A base material as a clad material and a laminate material that is difficult to weld with the base material are brought together at the surfaces to be joined, and the periphery of the surface to be welded is surrounded by the base material and the laminate material. A method for producing a rolled clad plate, in which the base material and the cladding material are assembled by welding through the ready-made cladding materials, and then heated and rolled. 2. A base material as a cladding material and a laminate material that is difficult to weld with the base material are brought together at the surfaces to be joined, and the periphery of the surface to be joined can be welded to the base material and the laminate material, respectively. Surrounded by a ready-made cladding material containing material, assemble the base material and cladding material by welding through the ready-made cladding material, and cover and reinforce with a reinforcing material so that the ready-made cladding material is not exposed to the surface,
A method for producing rolled clad plates by heating and rolling them. 3 A base material as a cladding material and a laminate material that is difficult to weld to the base material are brought together at their joint surfaces, and the periphery of the surface to be joined can be welded to the base material and the laminate material, respectively. A rolling clad is surrounded by a ready-made clad material containing a material, the base material and a cladding material are assembled by welding via the ready-made clad material, the ready-made clad material is covered with a reinforcing material so that it is not exposed on the surface, and this is heated and rolled. When manufacturing plates, the reinforcing material around the surface to be joined protrudes from the surface position of the laminate, and the height of the protrusion is at least 1.3 times the diameter of the intake hole that leads inside the base material to the surface to be joined. ,
A method for manufacturing a rolled clad plate, characterized in that the amount of reduction in the first pass of rolling with the air intake hole facing backward is greater than the protruding height of the reinforcing material.