Titanium and titanium alloy is an extremely important lightweight structural materials, widely used in aerospace, vehicle engineering, Titanium Plate biomedical and other fields, Titanium Plate has always been a hot material research. With the development of economy and technology, there have been more and more applications of titanium plate, Titanium Plate but the corresponding surface quality problems are more prominent.

 

Titanium plate surface defects are conventional defects and unconventional defects two categories. The general defect is:

 

1, scratched

 

Reason: guide plate, roller table, Titanium Plate tools and roll is not clean, with sticky material or angular burr, rolling scratch the surface; operation is not careful, so that each collision to form a scratch surface.

 

Measures: before rolling to check the tools, guides, Titanium Plate roller and roll, etc., found that the problem in time to clear; operation carefully, do not pull chaos hit.

 

2, metal presses

 

Reason: the edge of the rolling burr and tail dregs were pressed into the product surface.

 

Measures: timely elimination of burr edge glitches and surface foreign body. Titanium Plate Crack edge, split in time to cut off.

 

3, non-metallic presses

 

Reason: poor sanitation, dust and foreign matter fall on the surface of the workpiece; after pickling, cleaning is not clean.

 

Measures: do a good job of health, timely removal of surface adhesion of the workpiece.

 

4, Ma Hang pits

 

Reason: pressure orthopedic annealing, the pressure plate or pad surface dust and foreign matter.

 

Measures: Temporarily remove the platen and pad surface before entering the furnace.

 

5, roll marks

 

Reason: roll surface wear serious, there are pits, linen, Titanium Plate scratches, etc .; roll surface plate angle out of the pit.

 

Measures: find roll marks, to repair or replace the roll.

 

Unconventional defects are:

 

1, surface crack

 

Reason: incoming failure, Titanium Plate the surface crack is not clean or the surface of the brittle suction layer is not clear, the other rules are unreasonable, Titanium Plate pass processing rate is small, too many times, or pass the processing rate of uneven distribution.

 

Measures: strict control of the surface quality of the material, Titanium Plate a reasonable allocation of road processing rate, to ensure that the slab annealing temperature uniformity, enhanced rolling lubrication.

 

2, acid spots

 

Reason: one is pickling, the residual acid is not washed clean, the formation of sheet drying. One is the plate in the stacking annealing, the surface oxidation uneven, Titanium Plate pickled surface corrosion caused by inconsistency.

 

Measures: pickling must be clean, to ensure that the surface of the plate no residual acid and then drying; reduce the thickness of the stack to ensure that the plate annealing evenly; can also be used sanding treatment, to the latter rescue.

 

Titanium plate surface is easy to form a layer of passivation of the oxide film, the conductivity is poor, and the titanium plate in the process of easy to contaminate the oil, Titanium Plate titanium plate will lead to decreased conductivity, resistance increases, while the coating can not Titanium plate surface close together. Therefore, in order to improve the conductivity of the electrode, Titanium Plate so that the coating and the substrate more closely, Titanium Plate and in order to remove the titanium plate during the processing of stains generated to ensure that the electrode electrochemical properties and coating activity, titanium matrix need to make the necessary deal with.