JPS5949295B2 - Copper alloy and its manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a copper alloy containing Fe and Co that has good weldability and brazing properties, and a method for producing the same.

Copper alloys containing Fe and Co are generally subjected to aging precipitation treatment to produce desired products.

This is because the above-mentioned copper alloy was originally developed as a copper alloy with high strength, and until now, it has been thought by those skilled in the art that it is natural to perform an aging precipitation treatment in order to make it into a product.

However, this type of alloy has insufficient workability, weldability, and brazing properties, and it is difficult to perform brazing or welding after deep drawing the material of this type of alloy. In addition, it was sometimes difficult to obtain the quality required for the product.

The present inventor has completed the present invention by considering the above-mentioned conventional technology and conducting research with the aim of creating a copper alloy that is easy to process and can ultimately produce products with high strength and excellent properties. .

Therefore, an object of the present invention is to obtain a copper alloy that is easy to process.

Another object of the present invention is to obtain a copper alloy with good weldability and brazing properties.

A further object of the present invention is to obtain a copper alloy from which a copper alloy product can be formed which can have sufficient strength in end-use conditions.

Another object of the present invention is to obtain a copper alloy that has sufficient strength to handle operations such as processing, welding, and brazing.

The copper alloy according to the present invention is different from the prior art in that it is not a non-precipitated solid solution consisting of Fe, Co, and effective trace amounts of additional elements and the remainder is substantially copper, but is a mere solid solution with no precipitates. It is.

The composition of the non-precipitating solid solution constituting the copper alloy of the present invention will be described below.

(1) Fe0.1-4.0% (shown in weight%).

(same below), Co 0.1-4.0%, remainder substantially C
u0 preferably Fe0.8~2.0, Co0.5~
A range of 1.5% is preferable.

(2) Fe0.1-4.0%, CoO, 1-4.0% and Si.

At least one selected from the group consisting of Mg, Ge, B, etc. is added to 0.005 to 0.1%, and the remainder is substantially Cu, preferably Fe, 0.8 to 2.0%, coo, 5 to 5%. 1.5
%, at least one kind such as Si added in a trace amount 0.01 to 0
．． A range of 0.05% is preferable.

The reasons for restricting the composition of these copper alloys are described below.

The addition of Fe and Co can contribute to improving the strength, and when Fe is higher than the above component range, it increases magnetism and reduces thermal conductivity, and when it is lower than the above component range, Fe increases magnetism and decreases thermal conductivity. When the content of Co is greater than the above-mentioned range, it reduces the thermal conductivity, and when it is less than the above-mentioned range, there is no effect of improving the strength.

When added in small amounts, Si, Mg, Ge, and B each improve strength and heat resistance, and suppress coarsening of crystal grains to prevent surface roughness during processing. However, if the amount is more than the above range of ingredients, the thermal conductivity will be lowered, and if it is less than the above range of ingredients, the above effect will not be obtained.

The copper alloy of the present invention is produced by melting an ingot of the alloy having the above-mentioned composition and hot working it into a desired bar or plate.
Solution treatment is carried out at 50°C, preferably 850° to 930°C, and this is processed to obtain various desired copper alloy products.

If this solution treatment is carried out at a too high temperature, the precipitates will aggregate at the grain boundaries and the crystal grains will become coarse.

These phenomena must be avoided because they cause roughness during processing and cracks during bending.

Furthermore, if the solution treatment temperature is low, ductility may be insufficient and cracks may occur during press working, making drawing forming impossible, which is not preferable.

The copper alloy of the present invention obtained by the above manufacturing method is a non-precipitating solid solution.

Table 1 shows the properties of the copper alloy of the present invention.

Table-1 Bending workability Drawing workability that does not break in adhesion test Hardness that does not break in Cambutist
65~80HV Proof strength 10~18 positive/ll1i Tensile strength 30~40 kf/rtuA elongation 3
0 to 40% Welding properties Good edge arc properties Good brazing properties Good silver brazing properties The copper alloy of the present invention with crystal grains finer than 45 can be processed and treated at high temperatures to be finished into a desired shape and structure.

In this case, processing refers to mechanical processing such as rolling, press forming, drawing, or bending, and high-temperature treatment refers to not only simple heat treatment but also work performed while heating, such as welding, brazing, and exhaust treatment. .

Processing is not necessarily essential in the process of using the copper alloy of the present invention, and is merely a process for finishing the sash and other shapes and structures.

Regarding high-temperature processing, for example, when brazing in a continuous furnace, even though the brazing work is performed at around 850°C, the brazing process is then heated at 450° to 650°C in the furnace. There is.

Such use is a preferred use of the present invention.

Next, an example of the use of the present invention will be described with reference to the drawings.

FIG. 1 shows a vacuum sealing member 1, which is one of the members for a vacuum container, and is obtained by solution treatment at 900° C. and press molding.

Figure 2 shows a vacuum container member 2 sealed with this vacuum sealing material 1.
It is.

The vacuum sealing member 1 is applied to the sealing part 3 of the vacuum container member 2 at 830°C.
After soldering with silver, it becomes as shown in Figure 3.

The vacuum container 4 assembled in this way is subjected to exhaust treatment at 500° C. for 1 hour.

The workability of such work and the properties of the final vacuum container members are shown in Table 2 for various components of the present invention.

6 is a reference example.

Furthermore, if the difference between the value of the distance expressed by h of the recess in Figure 3 before exhaust treatment and the value when the internal pressure reaches 10-wnHg is expressed as the amount of deformation, the following table 3 shows the difference. It became.

The outer diameter of the vacuum container at this time was 45 mm, and the internal pressure was maintained as described above while heating at 500° C. for 1 hour.

Table 3 Deformation amount (simplified) J161~ya 50~0.1 ya6 0.8~2.0 As described above, the copper alloy of the present invention can be used not only as a member for vacuum containers but also for various other applications, and is extremely easy to process. It has excellent properties such as easy weldability, good brazing properties, sufficient strength during these operations, and sufficient strength as a final product. be.

[Brief explanation of the drawing]

FIG. 1, FIG. 2, and FIG. 3 all show examples of use of the copper alloy of the present invention. 1... Vacuum sealing member, 2... Vacuum container member.

Claims (1)

[Claims] 0.1 to 4.0% by weight of IFe, 0.1 to 4% of CO
．． A copper alloy with good weldability and brazing properties since it is a non-precipitated solid solution and is substantially composed of Cu. 2 0.1 to 4.0% by weight of Fe, 0.1 to 4% of Co
．． 0 weight balance An alloy consisting essentially of Cu at 800° to 9
A method for producing a copper alloy that is not a precipitated solid solution and has good weldability and brazing properties, the method comprising solution treatment at 50°C. 3 Fe: 0.1-4.0% by weight, CO: 0.1-4%
．． 0% by weight, and 0.005 to 0.1 of at least one species selected from the group S iy M g + G e and B Yoshi group.
A copper alloy with good weldability and brazing properties since it is a non-precipitated solid solution, with the balance being substantially Cu by weight.