The design of copper alloy is based on the quantitative relationship between the composition, microstructure, properties and technology of copper alloy, and the expected properties are obtained through strict control and reasonable cooperation of the composition and microstructure of copper alloy. In the design, the following three aspects need to be considered comprehensively: First, fully understand the service properties of copper alloys (such as mechanical properties, physical properties, chemical properties, etc. ); Second, it is necessary to understand the technological properties of copper alloys from production to finished products (such as casting, forging, welding, cutting, adding I, etc.). ); Third, very important economic factors (such as raw materials, prices, markets, etc. ) should be considered.

Copper alloy design should consider the following factors:

(1) has good performance. Mechanical properties are the important basis and goal of copper alloy design. The value of metal materials in engineering materials first comes from the good combination of strength and toughness. For structural materials, first of all, we should meet the strength requirements and give full play to the strength function to reduce the weight of objects and save metal; Secondly, it should have enough plasticity and toughness to ensure the safety of use. Under special circumstances, in addition to conventional mechanical indexes, it should also have excellent high-temperature stability, fatigue strength, high-temperature creep strength, fracture toughness and so on. In addition, for materials in some application scenarios, the requirements of various media for electrical conductivity, thermal conductivity, magnetism and corrosion resistance should be specifically considered.

(2) Good processability. Machinability has two meanings, one is hot working into materials, and the other is cold working into parts. Obviously, the better the formability, the higher the product quality, the lower the cost and the less energy consumption.

(3) Low cost and economy. When designing copper alloys, use less rare and precious metals. In terms of the number of people added, the performance shall prevail. In the process design, we should not only give full play to the potential of copper alloy, but also strive to be simple and reasonable.

(4) Rational use of resources. First of all, we should make full use of our own resources and establish our own copper alloy series. Secondly, we should make rational use of * * * mineral deposits and effectively use the residual elements in raw materials. Third, we should make rational use of rare and precious metals.

(5) Environmental protection. When designing copper alloy, we should fully consider its impact on the environment in the process of preparation and use and its easy recycling after service.

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