JPS5964157A - Joining method of al or al alloy sintered member - Google Patents

Abstract

PURPOSE:To join metallurgically and securely a fusing member consisting of Al or an Al alloy via a specific joining layer of Cu powder, etc. CONSTITUTION:A joining member consisting of a grean compact or a sintered body of Al or an Al alloy is pressed to the joining surface of a fusing member consisting of Al or Al alloy via a joining layer constituted of 1 or >=2 kinds of powder among Cu powder, Sn powder and Zn powder or the green compact thereof, then these members are joined by heating. The members are metallurgically and securely joined without variance in the joint strength.

Description

[Detailed Description of the Invention] This invention is an AI! Alternatively, the present invention relates to a method of metallurgically joining a sintered part made of Ae or AA gold alloy to a melted part made of Ag alloy.

Usually, AC also I''iAi! iAi!
It's Ai! When joining sintered parts made of alloys, it is common to use either an adhesive or mechanical joining.

However, in the former method of joining using adhesives,
Due to the presence of pores on the surface and inside of the sintered part, the contact area at the bonding surface is relatively small, and furthermore, the bonding strength is relatively low because the applied (and adhesive) is absorbed into the pores. However, since the adhesive is organic, there are problems in that the thermal properties of the joint surfaces are poor.

In addition, in the latter mechanical joining method, since screws are usually used, screw holes must be drilled in the sintered part, and as a result, the strength of the sintered part does not deteriorate, but As a result, it is necessary to increase the thickness of the entire sintered part, which increases the cost of sintering and imposes restrictions on design, as well as complicating the work.

Therefore, from the above-mentioned viewpoint, the present inventors have made several efforts to solve the problems of the conventional joining method by using a metallurgical joining method. When joining the sintered parts made of the sintered AC alloy, one or more of Cu powder, Sn powder, and Zn powder or a compacted powder is interposed on the joint surface. They came to the knowledge that when heated, the two parts become firmly bonded.

The present invention has been made based on the above findings, and the present invention is based on the above-mentioned findings. A bonding layer made of an AC or JV gold alloy compact or a sintered body is brought into contact with a bonding layer made of powder or a green compact of at least 100% of the powder or green compact.
The present invention is characterized by a method of joining a sintered part made of AC or AQ alloy to a molten part made of AQ or Aft alloy.

Next, the joining method of the present invention will be specifically explained using examples.

Examples Each of the melted part sets made of Δ [or Yashi alloy] having the composition shown in Table 1 (JIS standard) and dimensions of width: 12 mm x length: 40 + n + n x thickness: 3 mm was prepared, and the joint phase was Prepare a compacted powder body or a sintered body having the composition shown in Table 1 and having the dimensions of 12 mm wide x 1 inch wide x 5 mm thick, and also as shown in Table 1. Then, on the upper surface of the melting section assembly, ii
1) The bonded portions are coated in the combinations shown in Table 1 and through the bonding layers also shown in Table 1 (preferably brushed in the case of powders and mixed powders), and in this state, Bonding methods 1 to 20 of the present invention were carried out by applying heat for 11 hours under the conditions shown in Table 1, respectively.

Next, the shear strength of the bonded parts of the resulting bonded composite parts was measured, and the measurement results are shown in Table 1. For comparison purposes, Table 1 shows the shear strength of the joints of the composite joints joined using a commercially available organic adhesive.

From the results shown in Table 1, in the composite parts joined by the joining methods 1 to 20 of the present invention.

It is clear that both methods have superior bonding strength compared to conventional bonding methods using adhesives.

As described above, according to the method of the present invention, a sintered part made of AC or AC alloy is metallurgically strong and there is no variation in bonding strength at the mouth of the melted part made of A (! or Ai! alloy). It is possible to join them.

Applicant: Mitsubishi Metals Corporation Agent Tomi 1) Kazuo and 1 other person

Claims (1)

[Claims] For a joint surface of a molten part made of AP or Ag alloy. Bonding made of green compacts or sintered bodies of At or Ag alloys via a bonding layer made of one or more powders or compacts of Cu powder, Sn powder, and Zn powder. Ag or Ai! A method of joining sintered parts made of alloys.