With the development of economy and technology, medical titanium plate is an important lightweight structural material. There are more and more applications of titanium plates, but the corresponding surface quality problems are more prominent. Titanium plates and surface reaction layers are the main factors affecting the physical and chemical properties of titanium workpieces. Titanium plate manufacturers must completely remove the surface pollution layer and defect layer before processing.

1. Unconventional defects

1) Surface fissure

The surface crack is not removed or the brittle gas absorption layer on the surface of the incoming material is not removed. The reason is that the incoming material is unqualified. In addition, the pressing procedure is unreasonable, the pass processing rate is small, there are too many passes, or the pass processing rate is unevenly distributed. Reasonably allocate the pass processing rate. Measures: strictly control the surface quality of incoming materials. Ensure uniform annealing temperature of slab and enhance rolling lubrication.

2) Acid spot

The residual acid is not washed clean. One reason is that the residual acid is not washed clean. The plate is formed by drying. One is that the surface oxidation of plates is uneven during stacking annealing, and the surface corrosion degree is inconsistent after pickling. Ensure that there is no residual acid on the plate surface before drying; Reduce the stacking thickness. Measures: pickling must be clean. Ensure uniform annealing of plates; Sanding treatment can also be used for later salvage treatment.

2. Conventional defects

1) Scratches

Sticks or edges, corners and burrs are found. The reason is that the guide plate, roller table, tools and rollers are not smooth and clean. Scratched surface during rolling; The operation is not careful, so that they collide with each other and scratch the surface. Timely eliminate problems found; Careful operation and measures: check the tools, guide plates, roller tables and rollers before rolling. Don't pull and bump.

2) Metal indentation

Cause: The edge burrs and tail slag of rolled pieces are pressed into the product surface. The cracked head shall be cut off in time. Measures: timely eliminate burrs on slab edges and foreign matters on the surface. Cracked edges.

3) Non-metallic indentation

Dust and foreign matters fall on the surface of rolled piece; After pickling, the reason is poor environmental sanitation. The cleaning is not clean. Timely remove the adhesion on the surface of rolled piece. Measures: do a good job of hygiene.

4) Roll mark

There are pits, pockmarks, scratches, etc; The surface of the roll is dented by the plate corners. Cause: The surface of the roll is severely worn. The roll shall be grinded or replaced. Action: Roll marks are found.

5) Pockmarks

There are dust and foreign matters on the surface of pressing plate or base plate. Cause: during pressing, straightening and annealing. Measures: Clean the surface of pressing plate and base plate in time before entering the furnace.

The content of this article comes from the Internet. If you have any questions, please contact us!