Unlock instant, AI-driven research and patent intelligence for your innovation.

Corrosion-resistant copper alloy for electrical connector and preparation method thereof

A technology for electrical connectors and copper alloys, applied in the field of corrosion-resistant copper alloys and their preparation, can solve problems such as corrosion, increased contact resistance, adverse environmental effects, etc., to solve serious tissue segregation, improve corrosion resistance, and reduce production. cost effect

Active Publication Date: 2021-12-03
NINGBO XINGYE SHENGTAI GROUP
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most basic performance requirement of electrical connectors is the reliability of electrical contact. At present, the most widely used copper alloy materials for electrical connectors in China are tin-phosphorus bronze series. Because ordinary tin-phosphorus bronze alloys are not corrosion-resistant, they are easy to Oxidation, discoloration, corrosion, etc., not only increase the contact resistance, but also easily cause corrosion failure, affecting the life of the electrical connector
At present, the method of tin plating on the surface of copper alloy materials is widely used to prevent corrosion. On the one hand, it increases the production cost of materials.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Corrosion-resistant copper alloy for electrical connector and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] The present invention also provides a method for preparing the above-mentioned corrosion-resistant copper alloy for electrical connectors, the processing method of which is drawing casting using a horizontal continuous casting process, including the following process flow: a. batching, feeding, and smelting according to weight percentage; b. horizontal Continuous casting; c. Milling; d. Rough rolling; e. Trimming; f. One-time intermediate annealing; g. Pickling; h. Finish rolling; .

[0027] The technical solutions of the present invention will be further described below through specific examples, but this does not mean limiting the protection scope of the present invention.

Embodiment 1

[0029] The composition of the alloy is shown in Example 1 of Table 1.

[0030] 1, smelting: the specific order of described feed intake is: first add copper (Cu), nickel-boron master alloy, aluminum (Al), phosphor-bronze master alloy, then add manganese (Mn), boron (B), finally add tin ( Sn), the melting temperature is 1200°C.

[0031] 2. Horizontal continuous casting: the casting speed is 140mm / min, and the strip outlet temperature is controlled at 380°C to 390°C.

[0032] 3. Face milling: the upper and lower face milling is 0.6±0.05mm.

[0033] 4. Rough rolling: the total deformation is 75%.

[0034] 5. One-time intermediate annealing: the heat treatment temperature is 500°C, and the holding time is 6h.

[0035] 6. Finish rolling: the total deformation is 55%.

[0036] 7. Finished product annealing: the finished product annealing temperature is 420°C, and the annealing time is 2 hours.

[0037] After the above process, the performance test results of the copper alloy ar...

Embodiment 2

[0039] The composition of the alloy is shown in Example 2 of Table 1.

[0040] 1, smelting: the specific order of described feed intake is: first add copper (Cu), nickel-boron master alloy, aluminum (Al), phosphor-bronze master alloy, then add manganese (Mn), boron (B), finally add tin ( Sn), the melting temperature is 1220°C.

[0041] 2. Horizontal continuous casting: the casting speed is 125mm / min, and the strip outlet temperature is controlled at 380°C to 390°C.

[0042] 3. Face milling: the amount of upper and lower face milling is 0.6±0.05mm.

[0043] 4. Rough rolling: the total deformation is 70%.

[0044] 5. One intermediate annealing: the heat treatment temperature is 510°C, and the holding time is 5h.

[0045] 6. Finish rolling: the total deformation is 62%.

[0046]7. Finished product annealing: the finished product annealing temperature is 430°C, and the annealing time is 2 hours.

[0047] After the above process, the performance test results of the copper allo...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
tensile strengthaaaaaaaaaa
Vickers hardnessaaaaaaaaaa
elongationaaaaaaaaaa
Login to View More

Abstract

The invention relates to a corrosion-resistant copper alloy for an electrical connector and a preparation method thereof, belonging to the field of nonferrous metal processing. The weight percent composition of the alloy is: Ni 0.3%~1.0%, Sn 2.0%~3.5%, P 0.05%~0.3%, Mn 0.05%~0.5%, B 0.001%~0.01%, Al 0.05~0.3%, the remaining Partly composed of Cu and unavoidable impurities. The element content of the copper alloy components needs to satisfy 2.5%≤Ni+Sn≤4.0%, 3≤Ni / Al≤15. The material is obtained after processing such as smelting, horizontal continuous casting, rough rolling, primary intermediate annealing, pickling, finishing rolling, and finished product annealing. The tensile strength of the corrosion-resistant copper alloy for electrical connectors of the present invention can reach 480-530 MPa, the Vickers hardness HV150-175, the elongation rate 11-20%, the electrical conductivity 25-38% IACS, and the 24-hour salt spray test weight loss ratio is 0.01 ~0.02%, 48-hour salt spray test weight loss ratio is 0.03~0.06%.

Description

technical field [0001] The invention relates to a corrosion-resistant copper alloy for an electrical connector and a preparation method thereof, belonging to the field of nonferrous metal processing. Background technique [0002] In recent years, my country's electrical connector market has developed rapidly, and has become the fourth largest electrical connector market leading the world's rapid growth. With the continuous development of electronic technology in recent years, electrical connectors are widely used in microelectronics, automotive industries and 5G communications. The application is becoming more and more attractive, the components are getting smaller and smaller, the current density is getting higher and higher, and the transmission speed is getting faster and faster. Electrical connectors are developing in the direction of high density, miniaturization, thinning, combination and high speed. . This puts higher requirements on copper alloy, the key material of t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/02C22C1/03B22D11/00C22F1/08C21D9/54H01B1/02H01B13/00H01R13/03
CPCB22D11/004C21D9/54C22C1/03C22C9/02C22F1/08H01B1/026H01B13/00H01B13/0016H01R13/03
Inventor 刘峰杨振马吉苗彭丽军雷伏庆蒋志晶陈军胡健肖芳郑芸
Owner NINGBO XINGYE SHENGTAI GROUP