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Process solid solution system

A process-based, solution treatment technology, applied in furnaces, heat treatment equipment, heat treatment furnaces, etc., can solve the problems of unsuitability for duplex stainless steel 2205 and the large influence on the performance of heat exchange tubes, and achieves favorable quenching effect, simple structure, and avoidance of The effect of steam dead ends

Inactive Publication Date: 2017-03-08
黄鸣
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Compared with traditional pure ferritic or austenitic stainless steel, duplex stainless steel 2205 has obvious phase transformation during heat treatment, which has a great impact on the performance of heat exchange tubes welded with this material, such as occurring at about 450 ° C and The brittleness changes around 800°C, which makes traditional stainless steel post-weld heat treatment equipment not suitable for duplex stainless steel 2205

Method used

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  • Process solid solution system

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Embodiment 1

[0023] Such as figure 1 As shown, it is used for solution treatment of duplex stainless steel pipes after welding, including two sets of driving wheels 1 located on the same straight line, anti-oxidation pipe 11 between the two sets of driving wheels 1 and sleeved on the anti-oxidation pipe The cooling chamber 7 and the heat preservation chamber 10 on the 11, the anti-oxidation pipe 11 is a tubular structure with a sealing ring 2 at both ends, the driving wheel set 1 includes two driving wheels, and the two driving wheels There is a gap for accommodating stainless steel pipes between them, the gap is located on the axis of the anti-oxidation pipe 11, and the anti-oxidation pipe 11 is also provided with an air outlet 3 and an air outlet, and the cooling chamber 7 and the heat preservation chamber 10 are located at the air outlet 3 Between the air outlet and the anti-oxidation tube 11 between the heat preservation chamber 10 and the adjacent driving wheel set 1, an intermediate ...

Embodiment 2

[0028] The present embodiment is further limited on the basis of embodiment 1, as figure 1 As shown, in order to control the transmission speed of the duplex stainless steel pipe in the anti-oxidation pipe 11 and control the movement state of the duplex stainless steel pipe, the two sets of driving wheels 1 are located on the same horizontal plane.

[0029] In order to facilitate the process parameter control of the heat preservation chamber 10 and the cooling chamber 7, temperature sensors are arranged in the heat preservation chamber 10 and the cooling chamber 7.

[0030] In order to facilitate the safety of the cooling chamber 7, a safety valve 4 is also provided on the cooling chamber 7.

[0031] In order to enable the protective gas to be used as a heat carrier to facilitate the rapid cooling of the duplex stainless steel tube in the cooling chamber 7, the gas outlet 3 is located at one end of the anti-oxidation tube 11 provided with the intermediate frequency heating coi...

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Abstract

The invention discloses a process solid solution system for solid solution treatment of a welded double-phase stainless steel pipe. The process solid solution system comprises two driving wheel sets, an oxidation prevention pipe, a cooling chamber, an insulation chamber and a medium-frequency heating coil; the oxidation prevention pipe is a pipe-shaped structure provided with sealing rings at two ends; the driving wheel sets respectively include two driving wheels; an intake port and an exhaust port are respectively arranged different ends of the oxidation preventing pipe; and the cooling chamber is a water storage container provided with a water inlet and a water outlet. The process solid solution system is simple in structure, is convenient to realize the process of all steps of the solid solution treatment of the double-phase stainless steel pipe, and realizes sudden heating and sudden cooling within short time in the solid solution treatment process.

Description

technical field [0001] The invention relates to the field of mechanical engineering heat treatment equipment, in particular to a streamlined solid solution system. Background technique [0002] At present, the domestic 2205 stainless steel products include 2205 stainless steel pipes, 2205 duplex stainless steel seamless pipes; 2205 duplex stainless steel plates, 2205 stainless steel bars, forgings, pipe fittings, strips, etc. Early duplex stainless steels were resistant to moderate-strength uniform corrosion and chlorine stress corrosion cracking, but their performance was greatly reduced when used in welded situations. In order to improve this situation, nitrogen is added to duplex stainless steel 2205, which not only improves the corrosion resistance, but also improves the welding performance. Due to the special performance characteristics of 2205 dual-phase steel, it has a wide range of applications, and it is a grade that has been widely used so far. Duplex stainless s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/08C21D9/50
Inventor 黄鸣
Owner 黄鸣
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