Continuous annealing method of pure titanium roll

An annealing and titanium coil technology, applied in furnaces, heat treatment equipment, heat treatment furnaces, etc., can solve the problems of large temperature range for titanium strip heating, long annealing time, and large total annealing time range, so as to ensure the smooth operation of production and improve Grain uniformity, the effect of ensuring annealing quality

Inactive Publication Date: 2014-09-24
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the patent application CN101748267A solves the problems of long annealing time and low production efficiency to a certain extent, it lacks specific technological means to improve the quality of titanium coils and improve the uniformity of annealing structure
In the annealing method of titanium coils mentioned in this patent application, the temperature range of the titanium strip heating is relatively large, and the total annealing time range is also relatively large, which is not conducive to the stable control of the annealing quality of the titanium strip; if the annealing time is too short, recrystallization Possibly incomplete; grain coarsening if annealed too long

Method used

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  • Continuous annealing method of pure titanium roll
  • Continuous annealing method of pure titanium roll
  • Continuous annealing method of pure titanium roll

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This example is used to illustrate the continuous annealing method of the pure titanium coil of the present invention.

[0034]The pure titanium coil to be annealed is uncoiled on the uncoiler, and the head of the last titanium coil unrolled on the uncoiler is welded to the tail of the previous titanium coil, and each titanium coil is repeated in this way; the titanium strip is applied by a tension roller. The tension of 500kg makes the titanium belt pass through the preheating section, heating section and soaking section of the annealing furnace continuously at a speed of 3m / min. Pass between the flames of the upper and lower rows of burners; and by adjusting the gas flow, combustion-supporting air flow and burner opening, the titanium belt is preheated to 320°C in the preheating section, and the titanium belt passes through at a constant temperature of 720°C Heating section, and make the titanium strip pass through the soaking section at a constant temperature of 720°...

Embodiment 2

[0037] This example is used to illustrate the continuous annealing method of the pure titanium coil of the present invention.

[0038] The pure titanium coil to be annealed is uncoiled on the uncoiler, and the head of the last titanium coil unrolled on the uncoiler is welded to the tail of the previous titanium coil, and each titanium coil is repeated in this way; the titanium strip is applied by a tension roller. The tension of 800kg makes the titanium belt pass through the preheating section, heating section and soaking section of the annealing furnace continuously at a speed of 2m / min. Pass between the flames of the upper and lower rows of burners; and by adjusting the gas flow, combustion-supporting air flow and burner opening, the titanium belt is preheated to 250°C in the preheating section, and the titanium belt passes through at a constant temperature of 700°C Heating section, and make the titanium strip pass through the soaking section at a constant temperature of 700...

Embodiment 3

[0041] This example is used to illustrate the continuous annealing method of the pure titanium coil of the present invention.

[0042] The pure titanium coil to be annealed is uncoiled on the uncoiler, and the head of the last titanium coil unrolled on the uncoiler is welded to the tail of the previous titanium coil, and each titanium coil is repeated in this way; the titanium strip is applied by a tension roller. With a tension of 200kg, the titanium strip continuously passes through the preheating section, heating section and soaking section of the annealing furnace at a speed of 5m / min. Pass between the flames of the upper and lower rows of burners; and by adjusting the gas flow, combustion-supporting air flow and burner opening, the titanium belt is preheated to 350°C in the preheating section, and the titanium belt passes through at a constant temperature of 750°C Heating section, and make the titanium strip pass through the soaking section at a constant temperature of 75...

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Abstract

The invention discloses a continuous annealing method of a pure titanium roll, and the method comprises the following steps: (1) a to-be-annealed titanium roll continuously, from head to tail, passes through a preheating section, a heating section and a soaking section of an annealing furnace in a speed of 2-5m / min in a form of a titanium belt, the titanium belt passes through the preheating section at the temperature of 250 to 350 DEG C, the titanium belt passes through the heating section at the temperature of 700 to 750 DEG C, and the total time for the titanium belt to pass through the annealing furnace is 4-10min; and (2) the titanium belt annealed by the annealing furnace is cooled in a manner of mist cooling. The continuous annealing method can significantly shorten the production cycle, improve production efficiency, and ensure the annealing quality of the titanium roll, improve annealed structure grain uniformity of the titanium roll, and ensure continuous production of a continuous titanium roll annealing-shot blasting-pickling process.

Description

technical field [0001] The invention belongs to the field of heat treatment of nonferrous metals, and in particular relates to a continuous annealing method for pure titanium coils. Background technique [0002] At present, the annealing methods of pure titanium coils mainly include vacuum annealing and continuous annealing. Among them, vacuum annealing is usually used for annealing of semi-finished coils and finished coils, and continuous annealing of titanium coils is mainly used for recrystallization annealing of hot-rolled coils before rolling. . The vacuum annealing of titanium coil is to put the whole titanium coil into the annealing furnace. During the heating process in a vacuum state, the heat is transmitted from the outer ring to the inner ring of the titanium coil, and the heat is transferred from the inner ring to the outer ring during the cooling process. Due to the The thermal conductivity of the titanium strip is poor, and the annealing temperature of the inn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/18C21D9/52
Inventor 彭琳李军肖聪郭华许震
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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