JPS6086255A - Preparation of high-strength conductive copper alloy - Google Patents

Abstract

PURPOSE:To prepare an inexpensive high-strength conductive copper alloy excellent in strength, springiness and corrosion resistance, by applying heat treatment to a copper alloy having a specific composition containing Zn, Sn and Al, and further containing As, Sb or B under a proper condition after final cold rolling. CONSTITUTION:An alloy containing, on a wt. basis, 10-40% Zn, 0.05-1.0% Sn and 0.05-1.0% Al and further containing one or more of 0.005-0.1% As and 0.005-0.1% Sb in the sum total of 0.005-0.2% and, further 0.005-0.1% B, 0.005-0.3% Pb and one or more of Ni, Si, Fe, Co, Cr, Mn, Te, In, Ti, Zr, Hf, Be, Mg, Ag, Cd and Ge in the sum total of 0.005-2.0% and comprising the remainder of Cu and inevitable impurities is heat treated at 150-700 deg.C for 30sec- 20hr after final cold rolling to obtain a high-strength conductive copper alloy enhanced in strength, especially, tensile strength, elongation and springiness simultaneously and also excellent in corrosion resistance.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a silver alloy to be heated at 150°C to 700°C for 30°C.
The present invention relates to a manufacturing method that simultaneously improves strength, especially tensile strength, elongation, and springiness by heat treatment for 20 seconds to 20 hours.

Traditionally, red copper and brass have been widely used as materials for electronic and electrical components because of their excellent workability and low cost. However, in recent years, the miniaturization of two-device devices, @
There is a strong demand for further increase in strength through quantification;
! ! Since the corrosion resistance is poor, there is a strong desire to improve the corrosion resistance.

The present invention takes advantage of this point in that it is inexpensive and strong.

The present invention relates to a method of manufacturing a stopper that maximizes the properties of an alloy that has excellent spring properties and excellent corrosion resistance, and it has been discovered that the best properties can only be exhibited under the heat treatment conditions specified in the present invention. Ta.

And the present invention uses zinc 10 to 40 wt%, 005
~1. Owt, aluminum 0.05~1.0wt
%, and further contains any one or two of arsenic α005-0.1 wt%, antimony 0.005-0,1 wt% in a total amount of 0005-0.2 wt%, and further boron 0.005-0.2 wt%.
0G5~0.1 wt%, nickel 0.005~1.
Owt%, silicon 0.005-1. OwttIb, iron 0.005-1.0 wt%, lead 0.005-0.3
wt%, cobalt 0.005-1.0 wt%, chromium 0005-1.0 wt%, manganese 0.005-1.0
wt%, tellurium 0005-1.0wt%, indium 0
．． 005-1.0wt titanium 0.005-1. O
Section, zirconium o, o o s~1. OwttI
), hafnium 0.005-1.0 wt%, beryllium 0.005-1. Owt%, magnesium 0
．． 005-1. Owt section, silver 0005~1.0wt%
, cadmium 0, [lO5~to wt%, germanium 0.005~1. After the final cold rolling, an alloy containing one or more of Owt% of 0.005 to 2.0wt1 in total and the balance consisting of copper and unavoidable impurities is
Heat treated at 50°C to 700°C for 30 seconds to 20 hours to obtain 1 strength.
The present invention relates to a method for manufacturing a high-strength conductive saw alloy that improves spring properties.

As a result, when 9 was manufactured using the method of the present invention, as shown in FIG. 1, it was possible to significantly improve the tensile strength, elongation, and spring limit value at the same time.

Next, the reason for limiting the alloy components will be explained. The reason why the zinc content d° is set to 10 to 40 wt% is that the zinc content is 10 wt%.
If the zinc content is less than 40 wt%, the strength will be low, and if the zinc content exceeds 40 wt%, a large amount of β phase will precipitate, making the material properties unstable.

The tin content is 0.05 to 1. The reason for setting it as Owt% is.

If the 6 content is less than 0.05 wt, the strength is low; When it exceeds Owt%, workability decreases.

This is because the conductivity is also significantly reduced.

The reason for setting the aluminum content to 105 to 1.0 wt4 is that if the aluminum content is less than 0.05 wt4, the strength will be low, and if the aluminum content exceeds 1.0 wd, the workability will decrease and the conductivity will decrease. This is because the decrease in

This is because if the predetermined amount of either arsenic or antimony exceeds either one, the workability decreases and the conductivity decreases significantly.

The predetermined amounts of boron and nickel as subcomponents.

'y Ilt= + Iron* Lead r Cobalt, chromium,
Manganese, tellurium, indium, titanium, zirconium.

hafnium, berylli, um, magnesium, silver.

If the total amount of one or more of the selected elements is less than 0.005 wt%, a high-strength alloy cannot be obtained, and if it exceeds 0.005 wt%, conductivity decreases and soldering occurs. This is because the decline in sex becomes significant.

150 limited the heat treatment temperature to 150℃ to 700℃
Below ℃, the heat treatment effect does not appear.

This is also because at temperatures exceeding 700°C, it softens in a short period of time. And the most preferable heat treatment temperature is 200℃
~6oo°C.

The reason why the heat treatment time is limited to 30 seconds to 20 hours is because if it is less than 60 seconds, the material properties will not be stable, and if it exceeds 20 hours, it will lose its economic value.

FIG. 1 is a graph showing the relationship between the tensile strength and the spring limit value before and after heat treatment.2 After the heat treatment of the present invention, both the tensile strength and the spring limit value are significantly improved.

Next, the present invention will be explained in detail.

Example An alloy having the composition shown in Table 1 was melted to obtain an ingot having a thickness of 30 legs. Next, the ingot was hot rolled at about 700℃ to a thickness of 80℃.
After listening, perform the jodutsu.

The final layer is made to a thickness of 0.5 mm and heat treated at 20 mC for 1 hour. This sample was pickled with about 10% sulfuric acid, and its tensile strength, elongation, and spring limit were measured.

As shown in Table 1, after heat treatment, tensile strength, elongation, and spring limit value were improved at the same time.

From the above examples and FIG. 1, the manufacturing method of the present invention has a
It has improved spring properties, making it an excellent alloy for electrical and electronic component materials, especially as a conductive spring material.

[Brief explanation of drawings]

FIG. 1 is a graph showing the relationship between the tensile strength and spring limit value of Alloy 5 before and after heat treatment. Patent applicant Nippon Mining Co., Ltd. Agent Patent attorney (7569) Keishi Junyo Figure 1 Tensile strength (Kg/mm2)

Claims (1)

[Claims] (1) Zinc 10~40wt, 0.05~1. O
wt person. Aluminum 0.05~1. Contains Owt96, and further arsenic [1005~0.1wt width, antimony 0.00
A total of 0, 0 of any one or two of 5 to α1wt%
Contains O5~0.2wt, plus 0.2wt boron. O05~
11wt%,=kke #0.005-1. Owtdb
, silicon 0.005-1. Owte, iron O4OO5-
1.0wt4, lead 0005~0.3wtqb, cobalt 0.0O5~1.0wt%. Chromium O, OO5~1.0wttl), manganese 0.0
05-1, o wt4, tellurium 0.005-1. Ow
14, indium 0005~1.0wt%, titanium 0
．． 005-1.0wt%. Zirconium 0005~twt%, Hafnium 0, O
D5-1. Owt%, beryllium 0.005-1.
Owt%. Magnesium 0.005-1.0wt%, silver 0.005
~1, Owt96, cadmium 0.005~1.
Owt%, germanium 0005 to 1.0Wt4, total Q of any one or two or more of germanium 0005 to 1.0Wt4, 005 to 2. Owt%
1. A method for producing a high-strength conductive copper alloy, which improves strength and springiness by heat-treating an alloy consisting of copper and unavoidable impurities at 150° C. to 700° C. for 30 seconds to 20 hours after final cold rolling.