JPS5949292B2 - Copper parts and their manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in metal products made of copper alloys containing chromium and zirconium.

Generally, copper alloys containing chromium and zirconium are aged and precipitated to produce metal products.

This is because copper alloys containing chromium and zirconium were originally developed as copper alloys with high strength, and it has been common knowledge for those skilled in the art to carry out aging precipitation treatment until now.

However, this type of copper alloy has insufficient workability, weldability, brazing properties, etc., and for example, it is difficult to perform brazing or welding after deep drawing, or it is difficult to achieve the final quality required. It's difficult.

The present inventor has studied the above-mentioned conventional techniques, conducted research with the aim of obtaining a product that is easy to process, and ultimately has high strength and high conductivity, and has completed the present invention.

Therefore, one of the objects of the present invention is to obtain a copper member that is easy to process. Another object of the present invention is to obtain a copper member with good weldability and brazeability.

Another object of the present invention is to obtain a copper member that can have sufficient strength in the final use state.

A further object of the present invention is to obtain a copper member that can have sufficient electrical conductivity in its final use state.

Still another object of the present invention is to obtain a copper member having sufficient strength for handling even in operations such as processing, welding and brazing.

Still other objects of the invention will be appreciated from the following description.

The copper member according to the present invention contains chromium and zirconium alone or in a combination of 0.3 to 2% by weight, carbon, magnesium,
It consists of a non-precipitating solid solution containing 0.005 to 0.1% by weight of at least one selected from the group consisting of germanium and boron, and the remainder being substantially copper.

The copper member of the present invention is distinguished from the prior art in that it is a mere solid solution without precipitates. The composition of the solid solid material constituting the copper member of the present invention is listed below.

In the following description, all "%" indicates weight percentage.

1 0.005 to 0.1% (preferably 0.01 to 0.05%) of at least one selected from silicon, magnesium, germanium, and boron, and 0.3 to 291% of chromium.
)8f or preferably 0.5 to 1q6), and the remainder is substantially copper.

2 silicon, magnesium, germanium, boron) and 0.005-0.1%01 or 0.01-0.05%) and zirconium α3-296
(preferably 0.3 to 1%), and the remainder substantially copper.

0.005 to 0.19110 or 0.01 to 0.051 f6) of at least one selected silicon, magnesium, germanium, boron) and 0.3 to 0.3 to 0.05 of chromium and zirconium. 2% (preferably 0.4-1.
5%) and the remainder is essentially copper.

The numerical values described in 1 and 2 above were set for the following reasons.
Chromium and zirconium contribute to improved strength and heat resistance, but degrade electrical and thermal conductivity.

Therefore, the above numerical values are determined based on the balance of these characteristics. In addition, when using the copper member of the present invention, when welding, 0.0% zirconium is added to prevent weld cracking.
Silicon, magnesium, germanium, and boron 1, which are preferably contained in amounts of 196 or more, improve strength and heat resistance when added in small amounts, and also function to suppress coarsening of crystals and prevent roughness during processing.

However, if the amount is too large, the thermal conductivity deteriorates, so the above value is set. The copper member of the present invention is prepared by melting an alloy having the above-mentioned composition and then heating the copper member at a temperature of 800 to 950°C, preferably 850 to 930°C.
It is obtained by solution treatment by heating to ℃.

The desired Q plate is subjected to the usual hot processing before solution treatment,
It is permissible to process the material into various shapes such as rods. In this case, the hot working temperature is preferably 700 to 800°C.
If solution treatment is performed at too high a temperature, precipitates will aggregate at grain boundaries and crystal grains will become coarse. These phenomena must be avoided because they cause roughness during processing and cracking during bending. If the solution treatment temperature is low, ductility may be insufficient or cracks may occur during press working. The copper member of the present invention obtained by the above manufacturing method is a non-precipitating solid solution.

Table 1 shows the characteristics of the copper member of the present invention.

The copper member of the present invention can be finished into a desired shape and structure by processing and high temperature treatment.

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

Processing is not necessarily essential in the process of using the copper member of the present invention. In other words, this is merely a means of finishing the copper member of the present invention into other shapes and structures. High temperature treatment is essential when high conductivity is required. In other words, the conductivity of the copper member of the present invention is improved by high-temperature treatment.
From the viewpoint of conductivity, high temperature treatment is most preferably carried out at 450 to 650°C, but there is no restriction on temporarily treating at a temperature higher than 650°C, for example around 850°C, and then processing at 450 to 650°C. It's not a thing.

For example, when brazing in a continuous furnace, the brazing work is
Even if it is done at about 50℃, it will be heated to 450~6℃ in the furnace after brazing.
It may be heated at 50°C.

Such uses are preferred for the metal products of the present invention. Next, a member for a vacuum container will be described as an example of the use of the copper member of the present invention.

FIG. 1 shows a vacuum sealing member 1, which is one of vacuum container members, and is obtained by press-molding a copper member of the present invention that has been solution-treated at 900°C.

FIG. 2 shows a vacuum container member 2 sealed with this vacuum sealing member 1. The vacuum sealing member 1 is silver-soldered to the sealing portion 3 of the vacuum container member 2 at 830° C., resulting in the state shown in FIG. 3.

Furthermore, the vacuum container 4 assembled in this way is 50
Evacuate for 1 hour at 0°C. The workability of such work and the properties of the final vacuum sealing member are shown in Table 2 for various copper members of the present invention.

For comparison, Table 2 also shows the case where an oxygen-free copper product was used as the vacuum fall prevention member. Oxygen-free copper products have traditionally been used as vacuum sealing members, but when treated in a high-temperature atmosphere, the hardness becomes 30-40 (Hv) and the yield strength is 4-5 kg/i, softening and deformation during exhaust treatment. is large.

On the other hand, the copper member of the present invention has excellent various properties.

Further, the amount of deformation Δh shown in Table 2 indicates the difference between the value before the exhaust treatment (h) shown in FIG. 4 and the value when the internal pressure reaches 10 -7 WllHg.

The outer diameter 8 of the vacuum container in this case is 4511! And so. Nah}
The copper member of the present invention can be used not only as a vacuum member for electron tubes, but also as a vacuum member for electron tubes.
Lead frame, lead pin Also effective as lead wire.

[Brief explanation of the drawing]

FIGS. 1, 2, 3, and 4 all show examples of how the metal product of the present invention is used. 1... Vacuum sealing member.

Claims (1)

[Claims] 1 Chromium and zirconium alone or in combination from 0.3 to
2% by weight and 0.00% of at least one selected from the group consisting of silicon, magnesium, germanium and boron.
A copper member having good brazeability and weldability, consisting of 5 to 0.1% by weight, the remainder being substantially copper, and being a non-precipitating solid solution. 2. The copper member according to claim 1, which is a sealing member for a vacuum container. 3 Chromium and zirconium alone or in combination from 0.3 to
2% by weight and 0.00% of at least one selected from the group consisting of silicon, magnesium, germanium and boron.
800% alloy consisting of 5 to 0.1% by weight and the remainder substantially copper.
A method for manufacturing a copper member having good brazeability and weldability, which is made of a non-precipitating solid solution and is characterized by solution treatment at ~950°C.