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A process for improving the surface quality of cold-rolled titanium coils

A technology of surface quality and process method, which is applied in the direction of workpiece surface treatment equipment, manufacturing tools, metal rolling, etc., can solve the problems of large surface roughness of shot blasting, less than 80% yield rate, and no defect grinding method, etc. Achieve the effect of improving the surface quality of finished products and excellent surface quality

Active Publication Date: 2019-10-25
LUOYANG SUNRUI TI PRECISION CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, affected by many factors, the surface quality of domestic cold-rolled titanium coils generally needs to be improved, and the average yield rate is less than 80%.
Through this grinding method, the serious defects with large size on the surface of the titanium coil can be reduced to a certain extent (such as the attached Figure 5 , attached Image 6 shown), but because the oxide layer on the surface of the hot-rolled titanium coil is not completely removed after shot blasting and before pickling, it appears gray-black (as shown in the attached Figure 7 shown), and the surface roughness of the shot blasting is large (about 6~10μm), and the small-sized surface has defects such as peeling and pressing (as shown in the attached Figure 8 shown) are difficult to find and remove
In addition, the patent does not explain the method of grinding the surface defects of titanium coils, but how to remove the surface defects and avoid the secondary defects of grinding titanium slag is one of the main problems facing the industry, which leads to the defects remaining until cold rolling Finished titanium coils, so it is still not possible to obtain cold-rolled titanium coils with excellent surface quality
[0005] Patent CN 102310314 B discloses a processing method for titanium and titanium alloy coils, including a shot blasting treatment, using a grinding method to treat local defects, and then performing subsequent pickling and cold rolling processes, but it is the same as the patent CN 104070076 A However, it is still impossible to find and remove small-sized surface defects such as peeling and press-in, and no effective and suitable defect grinding method has been proposed, and it has not been solved how to remove the surface defects of titanium coils and avoid the bonding of grinding titanium slag. Secondary defects are difficult, so it is impossible to obtain cold-rolled titanium coils with excellent surface quality
[0006] At present, there is no technological method for better technical improvement of the surface quality of cold-rolled titanium coils in the prior art.

Method used

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  • A process for improving the surface quality of cold-rolled titanium coils
  • A process for improving the surface quality of cold-rolled titanium coils
  • A process for improving the surface quality of cold-rolled titanium coils

Examples

Experimental program
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Effect test

Embodiment 1

[0046] 2.0mm specification TA2 cold-rolled titanium coil preparation

[0047] The first step, annealing and shot blasting pickling: use continuous annealing and shot blasting pickling line to anneal and descale the 6.0mm hot-rolled titanium coil to obtain silver-white, uniform and bright pickled hot-rolled titanium coil .

[0048] The second step, grinding of hot-rolled titanium coils: uncoiling visual inspection and grinding, for medium and serious surface defects with a size of ≥0.3mm, use 40# angle grinder for grinding, and then use 60# thousand impellers for grinding Polishing; for small defects with a depth of less than 0.3mm, use a 60# thousand impeller to directly polish and grind, and the grinding is along the rolling direction.

[0049] The third step, cold rolling: the hot-rolled titanium coil is cold-rolled, the cold-rolled deformation is 12%, and the target thickness is 5.3mm.

[0050] The fourth step, degreasing: Degreasing the semi-finished cold-rolled coils in...

Embodiment 2

[0057] Preparation of 1.0mm gauge TA1 cold-rolled titanium coil

[0058] The first step, annealing and shot blasting pickling: use continuous annealing and shot blasting pickling line to anneal and descale the 4.0mm hot-rolled titanium coil to obtain silver-white, uniform and bright pickled hot-rolled titanium coil .

[0059] The second step, grinding of hot-rolled titanium coils: open the coil for visual inspection and grinding, and use 60# angle grinder for grinding for medium and serious surface defects with a size of ≥0.3mm, and then use 60# thousand impellers for grinding Polishing; for small defects with a depth of less than 0.3mm, use a 60# thousand impeller to directly polish and grind, and the grinding is along the rolling direction.

[0060] The third step, cold rolling: the hot-rolled titanium coil is cold-rolled, the cold-rolled deformation is 25%, and the target thickness is 3.0mm.

[0061] The fourth step, degreasing: Degreasing the semi-finished cold-rolled co...

Embodiment 3

[0068] Preparation of 0.5mm gauge TA1 cold-rolled titanium coil

[0069] The first step, annealing and shot blasting pickling: use continuous annealing and shot blasting pickling line to anneal and descale the 3.5mm hot-rolled titanium coil to obtain silver-white, uniform and bright pickled hot-rolled titanium coil .

[0070] The second step, grinding of hot-rolled titanium coils: open the coil for visual inspection and grinding, and use 60# angle grinder for grinding for medium and serious surface defects with a size of ≥0.3mm, and then use 60# thousand impellers for grinding Polishing; for small defects with a depth of less than 0.3mm, use a 60# thousand impeller to directly polish and grind, and the grinding is along the rolling direction.

[0071] The third step, cold rolling: the hot-rolled titanium coil is cold-rolled, the cold-rolled deformation is 29%, and the target thickness is 2.5mm.

[0072] The fourth step, degreasing: Degreasing the semi-finished cold-rolled co...

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Abstract

A process for improving the surface quality of cold-rolled titanium coils, comprising the steps of annealing, shot blasting and pickling, the steps of grinding hot-rolled titanium coils, the steps of cold rolling, the steps of degreasing, the steps of grinding semi-finished products and shot blasting acid wash steps. The process method of the present invention can eliminate defects such as peeling, pressing, oxidation residue and scratches on the surface of titanium coils to the greatest extent through reasonable process route settings and defect grinding and removal methods, so as to significantly improve the quality of cold-rolled titanium coils. Surface Quality. The method itself is simple to operate, has good stability and reliability, is suitable for mass industrial production, and can stably obtain cold-rolled titanium coils with excellent surface quality.

Description

technical field [0001] The invention relates to the technical field of processing titanium metal materials, in particular to a process for improving the surface quality of cold-rolled titanium coils. Background technique [0002] Titanium and titanium alloys have excellent properties such as high specific strength and corrosion resistance, and are widely used in petroleum, chemical industry, metallurgy, electric power, environmental protection and other fields. Cold-rolled titanium coil has the advantages of high production efficiency, high dimensional accuracy, consistent and stable product quality, etc., and is suitable for mass industrial production. It is the main method of titanium plate and strip production. However, affected by many factors, the surface quality of domestic cold-rolled titanium coils generally needs to be improved, and the average yield rate is less than 80%. The main surface defects are peeling (if attached figure 1 shown), press in (as attached f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B15/00B21B1/22B21B45/02
CPCB21B1/22B21B15/00B21B45/0269B21B2001/221
Inventor 李渤渤陶会发陈涛刘茵琪王非刘喜波申瑞朱彤朱乐乐
Owner LUOYANG SUNRUI TI PRECISION CASTING