Technique for improving surface quality of cold-rolled titanium strip coil

Abstract

The invention provides a technique for improving the surface quality of a cold-rolled titanium strip coil. The technique for improving the surface quality of the cold-rolled titanium strip coil comprises the step of annealing, shot-blasting and pickling, the step of coping of a hot-rolled titanium coil, the step of cold rolling, the step of degreasing, the step of coping of a semi-finished product, and the step of shot-blasting and pickling. According to the technique for improving the surface quality of the cold-rolled titanium strip coil, through reasonable process circuit arrangement and adefect coping and removal method, defects, such as peeling, indentations, oxide residues and scratches, on the surface of the titanium strip coil can be eliminated to the maximum extent, and thus, thesurface quality of the cold-rolled titanium strip coil is remarkably improved. The technique is simple in operation, good in stability and reliability and suitable for mass industrial production, andcan obtain the cold-rolled titanium strip coil 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...

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.

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