JPS5910491A - Joining method of metallic base material - Google Patents

Abstract

PURPOSE:To join simply and easily both metallic base materials to be joined, by sandwiching a sheetlike packing material consisting of particulate metals and a binder between the joint surfaces of both materials and heating the same to a high temp. in a protective gaseous atmosphere. CONSTITUTION:>=1 Kinds among particulate metals of <=100 meshes such as B, Si, Cr, Ni, W, Co, Fe, Cu, Ag or the like or >=1 kinds among finely powdered metallic alloys are molded with a ceramic or thermoplastic resin as a binder to a thin sheet of 0.2mm.- several mm.. The sheet is cut to a suitable size and is sandwiched between the joint surfaces of the metals to be joined, whereafter the assembly in put in a heating furnace wherein a protective gaseous atmosphere of H, He, N or their gaseous mixture is maintained, and the assembly is heated for several minutes - several tens minutes at 1,000-1,600 deg.C. The two metals are simply and easily joined without the aid of gas welding, arc welding or the like.

Description

[Detailed description of the invention] The present invention relates to a method for joining metal substrates.

Traditionally, there are gas welding methods, arc welding methods, electric pressure welding methods, seam welding methods, etc. to join two metal profiteers, but all of them involve heating the joint to a high temperature locally and simultaneously supplying a filler. It is also possible to heat and melt it and fill the feeding part;

Since these require local heating and filler is supplied during heating, it is difficult to automate these bonding processes, causing a decrease in productivity.

The present invention has been made in view of the above points, and provides a method in which metal substrates can be joined continuously in a high-temperature furnace by supplying a filler prior to the heating process without using local heating. This is a proposal.

The fine particulate metals used in the method of the present invention include B, Si, O
At least one of r, O, Ni, W, co, Fθ, p, Ou, and Ag, and alloys thereof may also be used. For these metals, -8 gold has a particle size of 60 mesh or more, preferably 100 mesh or more, and is coated with shellac and thickened using a bonding material such as thermoplastic resin. Form into a thin, uniform notebook shape with a thickness of 2 mm to several mm. The filler formed in this way is cut to an appropriate size, and if desired, is pasted and sandwiched between the joining surfaces of the two metal bodies to be joined using an adhesive such as epoxy/resin. Make it into a sandwich shape. These are then introduced into a furnace surrounded by a protective gas such as hydrogen gas, helium gas, chiron gas, carbon dioxide gas, or a mixture thereof.

It is desirable that this protective gas be dry and contain as little moisture as possible. Then, the sheet filler and the metal profiteer are melted by heating at a temperature of 1100° C. to 1600° C. for several minutes to several tens of minutes, and then taken out of the furnace and cooled.

The filler and the metal substrate near it are melted by heating, and an alloy layer is formed in this portion, thereby firmly joining the two metal substrates.

The method of the present invention is useful for manufacturing metal articles consisting of a combination of several metal products having a total weight of several six grams to several tens of kilograms from the viewpoint of workability, furnace thermal efficiency, etc. Therefore, this method is suitable for manufacturing articles that are mass-produced from various metal parts of industrial machinery, such as mounting fittings for hydraulic and pneumatic cylinders. Hydraulic and pneumatic cylinders are used in all industrial fields as a drive source for linear motion, and even for cylinders of the same size, different mounting brackets are required depending on the mounting location.Therefore, mounting brackets of various shapes are required. needs to be mass-produced. For example, a trunnion metal fitting, which is one of them, has a shape that has cylindrical protrusions pointing outward at two opposite positions on the circumferential surface of a metal ring. There are two methods: to create the original shape by casting or forging and then cutting it, or to manufacture the metal ring and the two cylindrical protrusions separately (this is easy to do), or to join them together by arc welding. These methods have drawbacks in terms of workability during manufacturing and the strength of the manufactured trunnion fittings.
It's been a long time since I've been satisfied. When applying the method of the present invention to the manufacture of this trunnion fitting, the metal ring and the two cylindrical protrusions are manufactured by appropriate cutting, and the metal-straddle alloy and Sorted fillers made of a binder with a thickness of 0.0 gm were pasted with adhesive and held in the shape of sandpaper, and heated at a temperature of 1350° C. for 15 minutes in an atmosphere of hydrogen gas. This is done by allowing it to cool down naturally afterwards. The shear stress of the joint of the trunnion fitting manufactured in this manner was measured to reach 88,000 PSi, which is sufficient strength as a mounting fitting for a hydraulic/pneumatic cylinder.

The method of the present invention heats and melts the metal base material to be joined and the sheet-like filler made of particulate metal or an alloy thereof and a binder at a high temperature.

The bond between the alloy metals is strong and great strength can be obtained. Since the filling material is still formed in the form of a sheet, by producing a large quantity of the sheet-like filling material in advance, the work becomes easier and more reliable, and the work efficiency is improved. Furthermore, since the sheet-shaped filler material is pasted between the joint surfaces and heated at a temperature of 110,000 to 1,600°C in an atmosphere of 1 mm gas, metal profiteering can be performed continuously and automation is easy. This is the ability to improve productivity.

Next, the present invention will be explained by examples.

Example 1 2% Cr, 8.5% B, 0.6% C, 8% Si by weight
A 0.8 mm thick sheet-like filling system consisting of 100% N and the remainder N was pasted between the joint surfaces of steel and metal using an epoxy resin adhesive. This was heated to 1350°C while flowing hydrogen gas.
The mixture was heated for 15 minutes and then allowed to cool naturally.

The shear stress of this joint was 88,000 PSi.

Example 2 30%Or, 10%B, 0.6%0.2%W by weight
A sheet-like filler having a thickness of 008 mm consisting of , and the remainder being CO was attached in the same manner as in Example 1. This was heated at 1250°C for 30 minutes while flowing hydrogen gas, and then allowed to cool naturally. The shear stress of this joint was 86,000 PSi.

Example 8 Helium gas is used instead of hydrogen gas as captured gas.

Example 4 0PS1 at/ko.

[Brief explanation of drawings]

FIG. 1rii is an explanatory diagram of the metal profiteering joining method of the present invention. 1...Trunion fitting 2.8.4...0...
Metal base material 5.6... Note-like filling. Special ¥ [Applicant: Toshihiro Aono-7-461-

Claims (1)

[Claims] (]) Between the joint surfaces of two metal profiteers to be joined, a filler formed into a sheet made of fine particulate metal or an alloy thereof and a binder is applied, if desired, with an adhesive. 1. A method for joining metal substrates, the method comprising: adhering and sandwiching the metal substrates together, and then heating them at a temperature of 1100° C. to 16000° C. in a protective gas atmosphere. (2) The method for joining metal profiteers according to claim 1, wherein the protective gas is hydrogen gas. (3) The method for joining metal substrates according to claim 1, wherein the protective gas is helium gas. (4) Claim 1 in which the protective gas is nitrogen gas
The method for joining metal substrates described in Section 1. (5) The method for joining metal substrates according to claim 1, wherein the protective gas is a mixed gas of hydrogen gas, helium gas, and chiron gas.