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Vertical-type continuous annealing furnace for titanium plate and steel strip

A continuous annealing furnace and annealing furnace technology, applied in the field of heat treatment, can solve the problems of excess production capacity, uneven structure and performance, surface quality defects, etc., to achieve the effect of improving efficiency

Active Publication Date: 2015-04-22
WISDRI WUHAN WIS IND FURNACE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of uneven microstructure and properties and surface quality defects of titanium strips in vacuum coil annealing, and to avoid the huge investment and excess production capacity caused by the construction of a new vertical continuous annealing furnace for titanium strips, the present invention proposes a Vertical continuous annealing furnace for annealing titanium strips and steel strips can be used for continuous annealing of titanium strips and steel strips to obtain annealed titanium strips and steel strips with uniform structure and properties and good surface quality

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  • Vertical-type continuous annealing furnace for titanium plate and steel strip
  • Vertical-type continuous annealing furnace for titanium plate and steel strip

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Embodiment 1

[0019] This embodiment is a vertical continuous annealing furnace, comprising an inlet seal 1, a heating section 2, a transition section 3, a cooling section 9, a turning device 6 and a channel 7, an outlet seal 8, a gas replacement system 4 arranged on the cooling section 9 and The protective atmosphere circulation system 5 installed on the heating section 2.

[0020] When the vertical continuous annealing furnace produces steel strips, the furnace uses a mixture of hydrogen and nitrogen (hydrogen gas volume ratio 99.99%) as the protective atmosphere; Furnace temperature, when the furnace temperature in each zone of the annealing furnace drops to 800°C, use the gas replacement system 4 to carry out nitrogen purge to gradually replace the hydrogen and nitrogen mixed gas protective atmosphere in the furnace with nitrogen, and then use high-purity (volume fraction 99.99%) Argon purging, gradually replacing the nitrogen protective atmosphere in the furnace with the required argon...

Embodiment 2

[0025] This embodiment is a vertical continuous annealing furnace, including an inlet seal 1, a heating section 2, a transition section 3, a cooling section 9, a steering device and a channel 7, and an outlet seal 8. The heating section is a muffle furnace, and there is a muffle in the heating section Pipe 10, gas displacement system 4 and protective atmosphere circulation system 5 arranged on cooling section 9.

[0026] When the vertical continuous annealing furnace produces steel strips, the furnace uses a mixture of hydrogen and nitrogen (80% hydrogen by volume) as a protective atmosphere; Furnace temperature, when the furnace temperature in each zone of the annealing furnace drops to 800°C, use nitrogen purge to gradually replace the hydrogen-nitrogen mixture protective atmosphere in the furnace with nitrogen, and then purge with high-purity (volume fraction 99.99%) argon, Gradually replace the protective atmosphere in the furnace with the required argon gas. During the re...

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Abstract

The invention relates to a vertical-type continuous annealing furnace for a titanium plate and a steel strip. The vertical-type continuous annealing furnace comprises a heating section, a transitional section and a cooling section, wherein sealing systems are respectively arranged in front of the heating section and behind the cooling section, and the protection atmosphere inside each section of the annealing furnace is communicated with each other; and the vertical-type continuous annealing furnace is characterized by comprising a protection atmosphere replacing system and a protection atmosphere cycling system; the protection atmosphere replacing system is communicated with an external protection gas supply system and used for rapidly replacing the protection atmosphere of different areas inside the annealing furnace by utilizing the protection atmosphere needed by the process according to the process requirement when the steel strip or a titanium strip is produced by the vertical-type continuous annealing furnace so as to complete the adjustment and replacement of the protection atmosphere inside the furnace; the protection atmosphere cycling system is used for spoiling the protection atmosphere in different areas of the vertical-type continuous annealing furnace so as to enhance the circulation of the atmosphere inside the furnace in the adjustment and replacement processes of the protection atmosphere in the furnace. The vertical-type continuous annealing furnace can be used for continuously annealing the titanium strip and the steel strip, and the annealed titanium strip and steel strip with uniform tissue and property and good surface quality can be obtained.

Description

technical field [0001] The invention belongs to the field of heat treatment, in particular to a vertical continuous annealing furnace suitable for annealing titanium strips and steel strips. Background technique [0002] Due to the active chemical properties of titanium, it is easy to chemically react with elements such as O, N, and H at high temperatures, resulting in poor performance of titanium plates and titanium alloys, reduced strength and plasticity, and increased hardness, which is not conducive to subsequent processing and use. Therefore, vacuum annealing or argon atmosphere protection annealing is generally used for titanium plate annealing. The annealing treatment in the existing titanium plate production process mostly adopts vacuum roll annealing, vacuum roll annealing is periodic annealing, and the annealing cycle is long, because in the process of vacuum annealing, the outer, middle and center parts of the titanium plate are heated unevenly, making the plate ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D9/56
Inventor 杨谦李卫杰杨进
Owner WISDRI WUHAN WIS IND FURNACE