A wear-resistant high-elastic copper alloy socket material and its preparation method

Abstract

The invention belongs to the technical field of copper alloy materials, and relates to a wear-resistant elastic copper alloy socket material and a preparation method thereof. The material comprises 2.0-5.0% by mass of Zn, 0.6-1.4% by mass of Sn, 1.2-2.5% by mass of Ni, 0.4-0.8% by mass of Si, 0.2-0.4% by mass of Al, 0.2-0.4% by mass of Mn, 0.03-0.10% by mass of P, 89.0-95.4% by mass of copper; may also include Mg and / or Cr in a total amount not exceeding 0.3% by mass. The preparation method includes: smelting, milling, hot rolling process, rough rolling-first annealing process, intermediate rolling-second annealing process, finish rolling-third annealing process. The copper alloy socket material prepared by composition regulation and process control has excellent high elasticity and high wear resistance.

Description

technical field [0001] The invention belongs to the technical field of copper alloy materials, and relates to a wear-resistant elastic copper alloy socket material and a preparation method thereof. Background technique [0002] Socket refers to the insertable seat of one or more circuit connections, can insert various wiring by it, is convenient to connect with other circuits like this. The connection and disconnection of this part of the circuit is achieved through the connection and disconnection between the line and the copper parts. With the development of society and the improvement of people's living standards, the types of sockets are more diverse, and the usage scenarios and environments are becoming more and more complex and changeable. It is widely used in different environments such as airports, stations, shopping malls, offices and other places with heavy traffic, dry north, humid south, and salty coastal areas. [0003] The socket is the core current-carrying ...

AI Technical Summary

Problems solved by technology

The tin phosphor bronze socket has a certain degree of elastic deformation while carrying current during use. After tens of thousands of plugging and unplugging, the surface of the socket will have serious wear and deformation.

On the one hand, the effective contact area between the socket and the pin will become smaller, causing the contact resistance to rise, resulting in problems such as excessive temperature rise of the socket during use, and there are potential safety hazards

On the other hand, the sleeve is constantly worn during the insertion and extraction process of the pin, resulting in an excessively large opening size of the sleeve, and the pull-off force of the pin will decline rapidly, which cannot meet the requirements for safe use.

There are also some sockets made of brass (such as H62) and copper (such as T2), but brass and copper have poor stress relaxation resistance and low fatigue life

[0006] A large number of existing technologies have been reported for improving the performance of copper alloys, such as Chinese patent CN106987738B, which discloses a Cu-Ni-Si-Co-Ti-RE copper alloy, including the following components in weight percentage: 0.5% ~2.0% Ni, 0.2%~0.9% Si, 0.5%~2.0% Co, 0.1%~0.5% Ti, 0.05%~0.2% RE, the rest is Cu, where RE is Ce, La and Y One or more of them, the tensile strength σ b It can reach 800-1000MPa, the plastic elongation δ is 3-10%, the electrical conductivity is 45-55% IACS, the stress relaxation resistance (working at 200°C for 1000h) is ≥80%, the tensile strength and dimension of the copper alloy material The hardness is too high, the elongation is low, and the bending and forming of the strip is difficult, so it is not suitable for stamping parts with complex shapes.

Chinese patent application CN 110629070A discloses a Cu-Ni-Sn alloy composition, including Ni 15-17%, Sn 8.5-10.5%, Mn 0.3-1.0%, Cr 0.03%-0.3%, Nb 0.03%- 0.3%, Si 0.03% ~ 0.3%, Zr 0.03% ~ 0.3%, Ti 0.03% ~ 0.3, the balance is Cu, the content of Ni and Sn in this patent is too high, and the electromagnetic stirring link is added in the preparation process. However, the comprehensive production cost of raw materials will increase, and the alloy composition cannot fully form a hard phase with high microhardness, so it cannot effectively improve the wear resistance.

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