The role of high-strength copper tubes in copper alloys: The research status of high-strength and high-conductivity copper alloys was reviewed, and the preparation methods and mechanisms of high-strength copper alloys were systematically exposed. strength and high conductivity by alloy method and composite material method. The critical research points and key problems in the field of high-strength and high-conductivity copper alloys, that is, the application of microalloy elements such as high-strength and high-conductivity copper alloys and rare earth alloys, were introduced. of high strength and high conductivity copper by rapid solidification method, and the development trend of high strength and high conductivity copper alloys was analyzed. It is noted that precipitation strengthening and composite strengthening are effective ways to improve the strength of materials and maintain their good electrical conductivity. Combined with the characteristics of China's resources, the direction of promoting the industrial application of the material is proposed. Copper alloy has a series of good comprehensive properties: high electrical conductivity, good corrosion resistance, high modulus of elasticity, high strength, good process performance, high resistance of copper pipes to marine pollution. Some also have good cutting performance and wear resistance, so they are widely used in many industries, such as ship accessories, valve stems and underwater pipelines, railway transit contact lines, lead frames, etc. This paper mainly studies the corrosion resistance of copper-zinc alloy and the wear resistance of copper alloy for contact wire. It is well known that copper-zinc alloys containing 27-30% Zn by weight are widely used in many countries of the world due to their good corrosion resistance and high strength. In general, when the zinc content of the produced copper-zinc alloys is in the range of 27-30% by weight, it is considered industrially qualified. In fact, changes in zinc in this range can have a significant impact on the corrosion properties of copper-zinc alloys. At present, most researchers focus on adding or reducing some trace alloy elements such as A1, Fe, B, Re and high-strength copper tubes to improve the corrosion resistance of copper-zinc alloys. Until now, little has been reported on the effect of small changes in zinc content on the corrosion behavior of copper alloys. Therefore, the purpose of this experiment is to investigate the corrosion resistance of a series of copper-zinc alloys with a small amount of zinc content change, with the aim of studying the corrosion resistance of the optimal zinc content. zinc or relatively small changes in the range of 27-30 wt% Zn content. In this experiment, a series of copper-zinc alloys (CuZnSnAlNiAsBRE) with different zinc contents were designed and their corrosion behavior in a salt fog environment was studied. The corrosion behavior was characterized by mass loss, electrochemical impedance spectroscopy (EIS), polarization curve, and surface topography observation, and the exposure time was maintained up to 360 h. With the extension of exposure time, the mass loss of high-strength copper pipes increases, but the corrosion rate decreases. The development history of high-strength and high-conductivity copper alloy materials, their typical strengthening mechanisms, and the effects of different strengthening mechanisms on the strength and conductivity of the alloys are summarized. At present, several important methods for the preparation of high-strength and high-conductivity copper alloys are: copper-based in-situ composite method, high-density double strengthening method, rapid solidification method, Conform+ cold working method and large plastic deformation method. High strength copper tube looks forward to the development trend of high strength and high conductivity copper alloy and its preparation technology, and notes that the new large plastic deformation combined processing method is an effective method to prepare High-strength, high-conductivity copper-based ultra-fine crystalline conductive materials, and efforts should be made to realize their industrial production.
