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High-strength copper alloy

A copper alloy, high-strength technology, applied in the field of high-strength copper alloy

Inactive Publication Date: 2012-02-22
SAN ETSU METALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with the general brass alloy manufacturing process, it is necessary to form solid copper alloy powder in a short time in order to prepare a blank for extrusion processing.

Method used

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  • High-strength copper alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Copper alloy ingots containing the elements described in Table 1 and Table 2 were prepared, and hot extrusion was performed immediately after heating and holding each ingot at 700°C. The extrusion ratio of extrusion processing was 37. Extract tensile test pieces from each copper extrusion material, at a strain rate of 5×10 -4 / s, the tensile test was carried out at room temperature. The results are described in Table 1 and Table 2. The examples of the present invention are sample numbers 1-16, and the comparative examples are sample numbers 17-19.

[0042] [Table 1]

[0043]

[0044] TS; tensile strength (MPa), ε; elongation at break (%)

[0045] [Table 2]

[0046]

[0047] TS; tensile strength (MPa), ε; elongation at break (%)

[0048] Sample Nos. 1 to 5, which are examples of the present invention, contain predetermined amounts of iron and chromium, and the tensile strength (TS) of the extruded material is about 130 to 210 MPa higher than that of sample No...

Embodiment 2

[0053] In the same manner as in Example 1, copper alloy ingots containing the elements described in Table 3 and Table 4 were prepared, and each ingot was heated and held at 700° C., and then hot extrusion was performed immediately. The extrusion ratio of extrusion processing was 37. Extract tensile test pieces from each copper extrusion material, at a strain rate of 5×10 -4 / s, the tensile test was carried out at room temperature. The results are described in Table 3 and Table 4. The examples of the present invention are sample numbers 20-24, 28-33, and the comparative examples are sample numbers 25-27, 34, and 35.

[0054] [table 3]

[0055]

[0056] [Table 4]

[0057]

[0058] Sample Nos. 21, 22, 23, and 24 of the present invention contained lanthanide elements, and the tensile strength was further increased to 640 to 680 MPa compared with sample No. 20 of the present invention example not containing them. In addition, experiment numbers 29 and 30 of the examples ...

Embodiment 3

[0062] Tensile test pieces were extracted from the brass alloy extruded materials of Sample No. 3 and Sample No. 5 in the example of the present invention, and the brass extruded material of Sample No. 19 in the comparative example, and subjected to a tensile test. The stress-strain diagram for this tensile test is shown in figure 1 middle. Compared with sample number 19 of the comparative example, it can be seen that sample numbers 3 and 5 of the examples of the present invention have higher tensile strength and yield point (yield strength).

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Abstract

A high-strength copper alloy which contains, in terms of % by weight, 20-45% zinc, 0.3-1.5% iron, and 0.3-1.5% chromium, with the remainder being copper.

Description

technical field [0001] The present invention relates to a high-strength copper alloy having excellent mechanical properties, in particular to a high-strength copper alloy produced by casting. More preferably, the invention provides a high-strength copper alloy with further improved strength characteristics by subjecting a cast copper alloy to thermoplastic working. Background technique [0002] Copper alloys are widely used in automobile parts, home appliance parts, electrical / electronic / optical parts, piping components (plumbing metal fittings, valves), and the like. Considering recent global warming prevention measures, there is a strong demand for products and components to be smaller, lighter, and thinner, and copper alloys, which have a higher specific gravity than iron, need to be strengthened to meet the above requirements. [0003] Among copper alloys, brass alloys containing zinc are often used for the above-mentioned parts from the viewpoint of corrosion resistanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/04C22F1/08C22F1/00
CPCC22C9/04C22F1/08
Inventor 上坂美治小岛明伦近藤胜义
Owner SAN ETSU METALS