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Method and device for performing inert gas protective cover type annealing on cold-rolled titanium strip coils

A bell-type annealing and bell-type annealing furnace technology, which is applied in the direction of furnaces, heat treatment equipment, heat treatment furnaces, etc., can solve problems such as the unclear way of supplying argon, achieve remote real-time display and automatic control, facilitate transformation, and process The effect of stable performance

Active Publication Date: 2015-02-04
WUKUN STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the existing full-hydrogen or nitrogen-hydrogen bell-type annealing furnace equipment for steel coils cannot directly supply argon, and the way of supplying argon is not clear, so it is necessary to design and manufacture a new one according to the annealing process requirements of titanium coils. The auxiliary device supplies argon gas to the full hydrogen or nitrogen-hydrogen bell annealing furnace as a protective atmosphere to meet the process requirements for annealing titanium strip coils.

Method used

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  • Method and device for performing inert gas protective cover type annealing on cold-rolled titanium strip coils
  • Method and device for performing inert gas protective cover type annealing on cold-rolled titanium strip coils

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A, close the argon valve 34, open and adjust the connection regulating valve 33 between the liquid argon bottle 31 and the argon buffer device 32, so that the gas pressure in the argon buffer device 32 reaches 220mbar;

[0046]B. Put 2077kg of titanium strip coils into the furnace according to the furnace loading plan, press the inner cover of the annealing furnace and pass the cold seal test, open the nitrogen valve 22, the intake valve 6 and the exhaust valve 7, and use nitrogen to safely purge and replace the air 20 minutes;

[0047] C. After exhausting the air, close the nitrogen valve 22 and quickly open the argon valve 34, connect the argon gas in the bell annealing furnace, carry out argon purge and replace the nitrogen gas before ignition until the argon gas purity in the furnace atmosphere is 99.9%;

[0048] D. After replacing the nitrogen gas, adjust the argon gas valve 34 and the exhaust valve 7 and continue to feed argon gas and keep the pressure in the mate...

Embodiment 2

[0051] A, close the argon valve 34, open and adjust the connection regulating valve 33 between the liquid argon bottle 31 and the argon buffer device 32, so that the gas pressure in the argon buffer device 32 reaches 400mbar;

[0052] B. According to the furnace loading plan, stack 2342kg of titanium strip coils into the furnace, press the inner cover of the annealing furnace and pass the cold seal test, open the nitrogen valve 22, the intake valve 6 and the exhaust valve 7, and use nitrogen to safely purge and replace the air 30 minutes;

[0053] C. After exhausting the air, close the nitrogen valve 22 and quickly open the argon valve 34, connect the argon gas in the bell annealing furnace, carry out argon purge and replace the nitrogen gas before ignition until the argon gas purity in the furnace atmosphere is 99%;

[0054] D. After replacing the nitrogen gas, adjust the argon gas valve 34 and the exhaust valve 7 and continue to feed argon gas and keep the pressure of the ma...

Embodiment 3

[0057] A, close the argon valve 34, open and adjust the connection regulating valve 33 between the liquid argon bottle 31 and the argon buffer device 32, so that the gas pressure in the argon buffer device 32 reaches 300mbar;

[0058] B. According to the furnace loading plan, stack 1835kg of titanium strip coils into the furnace, press the inner cover of the annealing furnace and pass the cold seal test, open the nitrogen valve 22, the intake valve 6 and the exhaust valve 7, and use nitrogen to safely purge and replace the air 25 minutes;

[0059] C. After exhausting the air, close the nitrogen valve 22 and quickly open the argon valve 34, connect the argon gas in the bell annealing furnace, carry out argon purge and replace the nitrogen gas before ignition until the argon gas purity in the furnace atmosphere is 99.99%;

[0060] D. After replacing the nitrogen, adjust the argon valve 34 and the exhaust valve 7 and continue to feed argon and keep the annealing furnace table mat...

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Abstract

The invention discloses a method and a device for performing inert gas protective cover type annealing on cold-rolled titanium strip coils, and belongs to the technical field of nonferrous metallurgy. The annealing method comprises the following steps of: pressure adjustment, feeding and exhausting, nitrogen displacement, heating and annealing, cooling and discharging. The device comprises a cover type annealing furnace (1), a nitrogen supply device (2) and an argon supply device (3), wherein the nitrogen supply device (2) is communicated with the inner cover of the cover type annealing furnace (1); and the argon supply device (3) is communicated with the inner cover of the cover type annealing furnace (1). Based on the common full hydrogen or nitrogen-hydrogen annealing furnace, the argon supply device is additionally arranged, so that different annealing requirements of the common full hydrogen or nitrogen-hydrogen annealing furnace for cold-rolled steel strips and titanium strip coils are met; and the device has the advantages of high efficiency, process stability, convenience for transformation, multiple purposes and high reliability.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metallurgy, and specifically relates to a cold-rolled titanium strip coil inert gas shield type annealing method and a device thereof with high efficiency, stable process, convenient transformation, multiple functions of one machine and high reliability. Background technique [0002] Because titanium and its alloys have many excellent characteristics such as low density, high strength, high temperature resistance, and corrosion resistance, they are called the third metal and are the most promising new structural materials. Cold-rolled titanium strips and coils are made of sponge titanium as raw materials, and are produced by smelting, hot rolling, cold rolling and cold rolling annealing processes. They are widely used in high-tech fields such as aerospace, aviation, submarines, and nuclear power. [0003] Titanium has a close-packed hexagonal structure below 882°C, and is a material with signi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D9/67
Inventor 秦光林史亚鸣陈育生志云昆杨勇黎俊聂志文熊鉴童军邢鹏涛
Owner WUKUN STEEL
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