JPS5821588A - Manufacture of bimetal - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a bimetal in which an intermediate metal material is interposed between metal materials on a high expansion side and a low expansion side. A three-layer/f image is used in which an intermediate metal material consisting of a low melting point metal such as copper (CtI) and a copper alloy is interposed between a metal material on the high expansion side and a metal material on the low expansion side. It is being

However, in the method of manufacturing this kind of bimetal,
When a bimetallic material is formed by pressure-welding strip-shaped metal materials, each metal material is individually hot-rolled (by cold rolling) to a predetermined thickness. There is a problem that the number of factories increases because pre-processing is required to roll the metal material to a certain thickness, and for this reason, hot rolling processing, which can perform rolling and pressure welding of metal materials at the same time, is often used.

However, steel and steel alloys, which are often used as intermediate metal materials, have high deformability and are soft.
When hot rolling is performed to round a bimetallic material, the copper (steel alloy) is heated and softens significantly, deforming it more than necessary and leaking out through the gap between the metal materials on the high expansion side and the low expansion side. Because of this, the bimetal material has an uneven wall thickness, and the bimetal obtained from this bimetal material often has an uneven bonding ratio, resulting in poor processing yields and The present invention has been made in view of the above-mentioned circumstances, and it is possible to easily and favorably produce a bimetal in which an intermediate metal material is interposed between the metal materials on the high expansion side and the low expansion side. In other words, the manufacturing method of the present invention is to provide a manufacturing method in which a metal frame material surrounding an intermediate metal material is placed between a high expansion side metal material and a low expansion side metal material and hot rolling is performed. This is to prevent unnecessary deformation of the intermediate metal material and prevent it from extruding.

The present invention will be explained below.0 First, in the ninth stage of manufacturing the bimetal material, as shown in FIGS. These metal materials 1 to 3 are arranged one on top of the other, with an intermediate metal material 1 forming a band-like plate interposed between them. A metal frame 4.4 in the form of a square bar is arranged along the circumferential edges on both sides in the longitudinal direction of the intermediate metal material 1, and metal frames 5, 5 are arranged along the circumferential edges on both ends of the intermediate metal material S, respectively.

That is, these metal frame materials 4, 4.5.5 are metal materials 1,
20 are overlapped to surround the intermediate metal plate 3. Here, the metal material 1 on the high expansion side is, for example, nickel (N
l)-manganese (Mu)-iron (?・) alloy or nickel-chromium (Cr)-iron alloy), the metal material 2 on the low expansion side is made of a 36-50% weight-metal-iron alloy. A certain @intermediate metal material 1 is made of a low melting point metal, mainly copper (Ca) and a copper alloy, which in combination with the metal materials 1 and 2 can provide a predetermined low volume resistivity as a bimetal as a whole. The intermediate metal material 3 is smaller in size than the metal material 1.2. The metal frame materials 4, 4.5, and 5 are made of copper. A metal that has a melting point close to IK, has good weldability with metal material 1.1, and increases its strength by rolling,
For example, it is made of mild steel or stainless steel.

In this way, each metal member 1.1 and the metal frame member 414.5.
In the combined state of Ii, as shown in FIG. 2 and FIG. Weld and join around the entire circumference. In this case, welding is performed by electron beam welding, Rede welding, or MIG welding. By this welding, metal material 1.2 and intermediate metal material 1
are fixed to each other, each of the metal members 1 to 3 and the metal frame members 4, 4.
5.5 is assembled and temporarily fixed in the 9 state. However, the mild steel to stainless steel that forms the metal frame 4.4.5゜5 has good weldability and securely joins the alloy that forms the metal body 1゜2. Next, the metal bodies 1 to J and the metal The combination of frame materials 4, 4.5゜5 is subjected to hot arc processing, and the combination 4.4, II, Ii is passed between rolling rollers while being heated. The material 1 and the intermediate metal material 1 and the metal material 2 and the intermediate metal material 3 are pressed together. In this case, the intermediate metal material 3 made of steel or copper alloy, which has a large deformability, is heated and gradually softened.The metal frame material 4.4.5.5 joined to the metal material 1. Because it surrounds the intermediate metal material 'S, even if the intermediate metal material 3 becomes soft, it prevents the metal frame materials 4, 4, B, and MK from protruding outside from between the metal materials 1 and 1. The material is then rolled to maintain its original shape and have a uniform thickness. For this reason, intermediate metal material 1 safety metal frame material 4
．． 4.5.8 prevents unnecessary deformation such as protrusion to the outside, and ensures uniform pressure contact with the metal bodies 1 and 2, respectively. In addition, the metal frame material 4.4.5.5 has a Myoko melting point and a lower deformability than the intermediate metal material 3, so the softening is significantly smaller than that of the intermediate metal material 3.
．． 5 is reliably joined to the metal materials 1 and 2 by welding, so the rolled metal materials 1 to 1, metal frame materials 4, 4, B, 15
does not peel off. Next, the entire peripheral edge of the metal materials 1 and 20 and each metal frame material 4.4.5.5 that is connected to the entire peripheral edge are cut and removed together using force ψ or a press. As shown in Fig. 5, a bimetal material is obtained by overlapping only the metal material 1.2 and the intermediate metal material 3 and pressing them together.This bimetal material has a uniform thickness (the intermediate metal material 1 covers the entire surface). Material I.

JK junction, and the thickness is uniform as a whole with no variation.

Then, the bimetal material is cold-rolled to a predetermined thickness.

Furthermore, one bimetal material is cut along the length direction to obtain a plurality of elongated materials, and the elongated strip-like materials are cut to a predetermined length to form a metal material shown in FIG. 6.

However, the formed bimetal is metal material Z,! Since the entire structure including the intermediate metal material 3 has a uniform wall thickness, each bimetal can be easily obtained with standard dimensions, and each bimetal is homogeneous and has small variations in bimetallic properties.

Example.

Metal materials 1 and 36 made of nickel-manganese-iron alloy
Metal frame material 4, 4.5., consisting of a metal material 2 made of a ts2V Kel-iron alloy, an intermediate metal material 1 made of copper, and a soft key.
S were combined to form a combination body having a wall thickness of 5 os, a width of 120 s, and a length of 600 s as a whole. The metal material 1.2 and the metal frame material 1 were joined by KfIII welding between their peripheral edges. Next, hot rolling is performed to press each metal material 1 to 3 and form a coil material with a wall thickness of 3 cm and a width of 130 pieces.90 In this rolling process li, the intermediate metal material 3 protrudes from the metal materials Z and j. No phenomenon was observed. Next, the peripheral part of the metal material 1.2 and the metal frame material 4.4.5.5 are cut with a pickpocket or a tar) to obtain a bimetal material having a uniform thickness throughout including the intermediate metal material 3. I was able to do that.

As explained above, the method for producing bimetal of the present invention is as follows:
By interposing an intermediate metal material between the high-expansion side and low-expansion side metal materials to prevent unnecessary deformation of the intermediate metal material during hot rolling, the yield of homogeneous tortoise-bimetal material can be improved. It can be easily manufactured.

FIG. 3 is a perspective view showing the bimetal material with the material removed.

1... Metal material on the high expansion side, 2. - Metal material on the low expansion side.

3...Intermediate metal material, 4, j--...Metal frame material.

Claims (2)

[Claims] (1) A combination of a high expansion metal material, a low expansion metal material, an intermediate metal material interposed between these two metal materials, and a metal frame placed around the intermediate metal material. hand,
A method for manufacturing a bimetal, characterized in that after bonding the peripheral edges of both the high-expansion side and low-expansion side metal materials and the metal frame material, pressure abrasion processing is performed. (2) The method for manufacturing a bimetal according to claim 1, wherein the metal frame material is made of mild steel.