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Bell type full-argon protective annealing method of titanium coil rod wire

A technology for wire rods and wires, applied in the field of heat treatment of titanium metal materials, can solve the problems of annealing without inert gas and protective atmosphere for titanium wire rods and wires, and achieve the effect of solving the problem of annealing heat treatment

Inactive Publication Date: 2013-02-27
YUNNAN TITANIUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no precedent for annealing titanium wire rod in an inert gas protective atmosphere in China.

Method used

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  • Bell type full-argon protective annealing method of titanium coil rod wire
  • Bell type full-argon protective annealing method of titanium coil rod wire

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Experimental program
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Effect test

Embodiment 1

[0019] Titanium wire rod cover type full argon protection annealing method, the present invention adopts the following process steps:

[0020] A. Put 2235kg titanium wire rod into the bell furnace;

[0021] B. Purging and replacing the furnace with argon with a purity of 99.999%. The time for purging and replacing is 60 minutes. After the replacement, the purity of the argon atmosphere in the bell-type furnace is 98.95%. 3 / Hour;

[0022] C. Use a heating mantle to ignite and heat up and keep warm, and use argon gas with a purity of 99.999% to purge and maintain pressure during the heating up and keeping warm; the purity of the argon atmosphere in the furnace during the heating up and keeping warm is 99.98%. Argon purge flow rate is 45 m 3 / hour, the time is 2.5 hours, and the argon pressure holding flow rate is 3 m 3 / hour, the time is 4.5 hours, and the purity of the argon atmosphere in the furnace is 99.91%;

[0023] D. After heating, use a heating hood to cool with a...

Embodiment 2

[0027] A. Put 1587kg titanium wire rod into the bell furnace;

[0028] B. Purging and replacing the furnace with argon with a purity of 99.999%. The time for purging and replacing is 62 minutes. After the replacement, the purity of the argon atmosphere in the bell-type furnace is 98.99%. m 3 / Hour;

[0029] C. Use a heating mantle to ignite and heat up and keep warm, and use argon gas with a purity of 99.999% to purge and maintain pressure during the heating up and keeping warm; the purity of the argon atmosphere in the furnace during the heating up and keeping warm is 99.98%. Argon purge flow rate is 45 m 3 / hour, the time is 2.0 hours, the argon pressure holding flow is 4 m 3 / hour, the time is 4.0 hours, and the purity of the argon atmosphere in the furnace is 99.85%;

[0030] D. After heating, use a heating hood to cool with a heating hood. During the cooling process with a heating hood, use argon gas with a purity of 99.999% for supplementary pressure maintenance. I...

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Abstract

The invention relates to a bell type full-argon protective annealing method of titanium coil rod wire. The method adopts the following process steps of A. placing the titanium coil rod wire which is hot forged and cold processed on a furnace stage of a bell type furnace; B. blowing the interior of an inner bell of the bell type furnace by argon with a purity of 95%-99.99999%; C. performing full-argon protective heating and keeping warm for the titanium coil by using an argon atmosphere with a purity of 95%-99.99999%; D. performing full-argon protective cooling with a heating mantle on the titanium coil rod wire; E. performing full-argon protective cooling on the titanium coil rod wire; and F. suspension opening the inner bell, drawing the titanium coil rod wire out of the furnace and sending to the following process after the cooling step is finished. The method has the following advantages and effects that the above solution can prevent the annealed titanium coil rod wire from newly increased oxidation phenomenon, makes the annealed titanium coil rod wire enter the following process directly, and solves the difficult problem of annealing heat treatment of the titanium coil rod wire.

Description

technical field [0001] The invention relates to an annealing method for industrial pure titanium hot-rolled (cold-processed) disc elements and wire rods, and belongs to the technical field of heat treatment methods for titanium metal materials. Background technique [0002] Pure titanium has some characteristics different from steel, such as: cooling crystal has an allotropic structure, below 882 ° C is a close-packed hexagonal structure, and there are few slip systems; rapid cooling after hot rolling, the overall performance is quite different; cold processing The deformation strengthening effect is remarkable, and the anisotropy is obvious; the chemical properties of titanium are lively, and it is easy to react with elements such as O, H, and N in the air at high temperatures, thereby forming a surface pollution layer on the surface, which deteriorates the physical and chemical properties and increases the hardness. The plasticity and elasticity decrease, and the brittlene...

Claims

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Application Information

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IPC IPC(8): C22F1/18
Inventor 苏鹤洲刘昆曹占元李志敏周健
Owner YUNNAN TITANIUM IND
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