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Manufacturing method of titanium sheet

A production method and sheet technology, applied in the direction of rolling force/roll gap control, etc., can solve the problems of discoloration on the surface of titanium plate, high production cost, long production time, etc. The effect of avoiding the deformation of the titanium coil

Inactive Publication Date: 2017-01-11
CHINA STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Disadvantages: (1) Use a vacuum furnace for heat treatment, the processing time of each batch of titanium coils is about 20 to 30 hours, and the production time is long; (2) The titanium coils are held at high temperature for too long, and the grains of titanium coils are relatively coarse, about 100 ~150 microns; and (3) rolling oil is likely to remain on the surface of the titanium coil after cold rolling, and react with the titanium coil to form titanium carbide (TiC) in a vacuum and high temperature environment, which is likely to cause discoloration on the surface of the titanium plate in an acid rain environment, affecting Exterior
[0009] Disadvantages: The length of the bright annealing furnace is 10-20 meters, and the continuous annealing of titanium coils in the bright annealing furnace protected by argon requires a large amount of high-purity argon gas, and the production cost is high

Method used

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  • Manufacturing method of titanium sheet
  • Manufacturing method of titanium sheet
  • Manufacturing method of titanium sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Titanium coils with a thickness of 1.2 mm are cold-rolled with a rolling rate of 50%. After the cold rolling, the thickness of the titanium coils reaches 0.6 mm. The annealing operation is carried out in an atmospheric environment in a continuous manner. The annealing temperature is set at about 800°C. The speed is set at 13 m / min, and then the titanium coil is subjected to continuous slow-speed, low-angle sandblasting operation. The particle size of the sandblasting steel ball is 0.5 mm. The blast current was set at 30 m / s and 60 amps. After the titanium coil is sandblasted at a slow speed, there is no serious deformation, and only 5-10 mm edge waves appear. Titanium coils in hydrofluoric acid (HF) and nitric acid (HNO 3 ) mixed pickling tank for continuous pickling, the concentration of hydrofluoric acid (HF) is 10 ml / liter, nitric acid (HNO 3 ) concentration was 120 ml / liter, the coiling speed of the titanium coil was set at 13 m / min, and excessive pickling did not...

Embodiment 2

[0067] Titanium coils with a thickness of 2.0mm are cold-rolled at a rolling rate of 50%. The speed is set at 7 m / min, and then the titanium coil is subjected to continuous slow-speed, low-angle sandblasting operation. The particle size of the sandblasting steel ball is 0.3 mm. Set at 20 m / s, blasting current at 50 amps. After the titanium coil is sandblasted at a slow speed, there is no serious deformation, and only 1-5 mm edge waves appear. Titanium coils in hydrofluoric acid (HF) and nitric acid (HNO 3 ) mixed pickling tank for continuous pickling, the concentration of hydrofluoric acid (HF) is 8 ml / liter, nitric acid (HNO 3 ) concentration was 80 ml / liter, the coiling speed of the titanium coil was set at 7 m / min, and the surface of the titanium coil after pickling did not appear excessive pickling.

[0068] After the pickled titanium coil is tempered by 0.5% rolling and 0.4% tension leveling, the ripples and side waves in the titanium coil will be completely eliminated...

Embodiment 3

[0073] The titanium coil with a thickness of 1.6 mm is cold-rolled with a rolling rate of 50%. After the cold rolling, the thickness of the titanium coil reaches 0.8 mm. The annealing operation is carried out in an atmospheric environment in a continuous manner. The annealing temperature is set at about 850 ° C, and the titanium coil is coiled. The speed is set at 20 m / min, and then the titanium coil is subjected to continuous slow-speed, low-angle sandblasting operation. The particle size of the sandblasting steel ball is 0.8 mm. is 40 m / s, and the blasting current is 70 amps. After the titanium coil is sandblasted at a slow speed, no serious deformation occurs, and only 10-15 mm edge waves appear. Titanium coils in hydrofluoric acid (HF) and nitric acid (HNO 3 ) mixed pickling tank for continuous pickling, the concentration of hydrofluoric acid (HF) is 12 ml / liter, nitric acid (HNO 3 ) concentration was 150 ml / liter, the coiling speed of the titanium coil was set at 20 m / m...

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Abstract

The invention relates to a titanium thin plate production method. The method comprises the steps of: (a) providing a titanium volume; (b) cold rolling the titanium roll; (c) continuous annealing process after cold rolling to titanium roll; (d) low-angle blasting to be slow after annealing the titanium roll, its jet hit rate is 20-40 m / sec, spray attack angle is 5-25 degrees; (e) for pickling of titanium roll after blasting; (f) perform temper rolling after pickling the titanium roll; and (g) flat rolled titanium coil by tension leveling. In this way, the method can improve production efficiency of titanium sheet, can refine the grains of the titanium roll and can reduce production costs.

Description

technical field [0001] The invention relates to a manufacturing method of a thin metal plate, in particular to a manufacturing method of a titanium thin plate. Background technique [0002] It is known that after cold rolling, due to work hardening, annealing treatment is usually required, so that its mechanical properties can meet the specification requirements. However, after the titanium coil is annealed at high temperature in the atmosphere, black scale will form on the surface, which will affect the formability of subsequent processing, so it must be removed through post-processing. [0003] The known annealing method after cold rolling of titanium coils is analyzed as follows in the prior art patent documents. [0004] 1.CN102002658 [0005] Method: After the titanium coil is cold-rolled, it is washed with alkali to remove the cold-rolled oil, and then it is annealed for a long time in a vacuum furnace. [0006] Disadvantages: (1) Use a vacuum furnace for heat treat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/18B21B37/58
Inventor 洪胤庭许登发张孝慈
Owner CHINA STEEL