Low stove pressure convection continuous roller bottom type annealing furnace and annealing technique

Abstract

The invention relates to a low furnace pressure convective continuous roller hearth type annealing furnace, which comprises a charging magazine, a heating chamber, a strong cooling chamber and a roller way driving system, wherein an internal circulation draught fan and a plurality of heating elements are arranged in the heating chamber, both an air inlet and an air outlet of the internal circulation draught fan are located in a furnace body of the heating chamber, the air inlet is vertical to the plane of a roller way, the air outlet is parallel to the plane of the roller way, an external circulation draught fan, a heat exchanger and a baffle plate are arranged in the strong cooling chamber, the baffle plate is located in the middle portion of the furnace body of the strong cooling chamber, the roller way is located between the heat exchanger and the baffle plate, an upper opening and a lower opening are respectively opened on the top and the bottom of the furnace body of the strong cooling chamber, the air inlet of the external circulation draught fan is communicated with the upper opening, the air outlet of the external circulation draught fan is connected with the lower opening through a connecting pipe which is arranged outside the strong cooling chamber, the complex number of nozzles are evenly distributed on the baffle plate, and the upper portion and the lower portion of the furnace body of the strong cooling chamber are communicated only through a complex number of nozzles. The annealing furnace of the invention has the advantages of even heating, rapid cooling, high efficiency and the like.

Description

technical field [0001] The invention belongs to the technical field of heat treatment of non-ferrous metals, and in particular relates to an annealing process suitable for copper and copper alloy intermediate pipes, and a low furnace pressure convection continuous roller hearth bright annealing furnace. Background technique [0002] In recent years, with the rapid development of China's economy, China's non-ferrous metal copper processing industry has continued to grow, and its production volume has continued to expand. Among them, the processing and production of condensation pipes has become one of the leading products of major domestic copper processing enterprises. Condensation pipes are thermal power, An important material for heat exchange condensers in ships, seawater desalination, sugar, salt, chemical, nuclear power, etc. The reliability of the condensing tube directly affects the safe and economical operation of the entire generator set. Therefore, the processing a...

AI Technical Summary

Problems solved by technology

This process has the characteristics of short process, high degree of automation, and high yield. However, due to the continuous annealing process, the internal stress of the workpiece cannot be completely eliminated. Usually, after annealing, it is easy to break during the cold drawing process.

In addition, most of the traditional technical equipment is a periodic tank furnace or a continuous chain muffle furnace, which cannot meet the annealing requirements of the ultra-long condensation pipe (intermediate and finished pipe), which is also the technical problem that the present invention strives to overcome

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