Short-flow efficient production method of pure copper tube

Abstract

The invention belongs to the metal material field and relates to a short-flow efficient production method of a pure copper tube. The technical scheme of the invention is as follows: the hot-cold combined moulding and continuous casting technology is adopted to efficiently produce the pure copper tube blank with an axial orientation structure and good inner surface quality and outer surface quality; subsequent shape processing is performed to the tube blank without adopting surface planing treatment; and intermediate annealing is not required in the processing process or little low-temperatureannealing is only required, so as to efficiently produce the pure copper tube. The hot-cold combined moulding and continuous casting technology is characterized in that a continuous casting crystallizer is combined by a heated hot moulding section and a cold moulding section which is forced to be cooled by the circulating water, and the solidification interface position of the tube is controlled to be near the borderline of the hot moulding section and the cold moulding section to efficiently prepare the tube blank with high surface quality and an axial orientation structure. The method has the advantages of short production process, low energy consumption, low cost, high yield and high production efficiency.

Description

technical field [0001] The invention belongs to the field of metal materials and relates to a short-flow and high-efficiency production method of pure copper straight tubes / coiled tubes. Background technique [0002] Pure copper tube has the characteristics of high strength at low temperature, good thermal conductivity and corrosion resistance. The pressure resistance of pure copper pipes is several times or even dozens of times that of plastic pipes and aluminum-plastic pipes. It can withstand the highest water pressure in today's buildings and has a bactericidal effect. Therefore, pure copper straight pipes are the best water supply pipes. It has become the first choice for the installation of tap water pipes, heating and cooling pipes in all high-end residential commercial houses. The pure copper coils with large coil weight are almost all used in refrigeration and air conditioning, mainly as heat exchanger tubes for evaporators and condensers in air conditioners. With...

AI Technical Summary

Problems solved by technology

[0006] However, there are problems in the production of tube blanks by hot continuous casting technology: ① only the continuous casting of small diameter (≤Ф50mm) and thin wall (≤3mm) tubes can be realized, and the casting speed is slow and the production efficiency is low. It is more suitable for the production of high-quality, precise and small pipes; ②Since the solid-liquid interface is near the outlet of the mold, the process control is difficult, and leakage accidents are prone to occur

But this invention also has the following problems: one, due to the high melting point of the white copper alloy, in order to obtain the required heat type temperature, the heat type adopts high-frequency induction heating, but the useful power factor of high-frequency induction heating is low, resulting in heat The energy consumption is larger when the type is heated, which increases the production cost; the second is that due to the large difference in the chemical composition of pure copper and cupronickel, the process parameters of continuous casting, forming processing and heat treatment are quite different

Due to the above reasons, the range of process parameters such as continuous casting, forming and heat treatment provided by the invention is only suitable for the production of white copper pipes, and cannot be applied to the production of pure copper pipes