Discussion on oxide scale defects of hot-rolled titanium plates

Oxide scale defects in hot-rolled titanium plates are a common problem. The main reason is that the surface of the titanium plate reacts with oxygen during the hot rolling process to form iron oxide scale. The following is a detailed analysis of the iron oxide scale defects of hot-rolled titanium plates:
1. Formation of iron oxide scale: During the hot rolling process, the surface of the titanium plate reacts with oxygen to form iron oxide scale. These iron oxide scales will adhere to the surface of the titanium plate during the cooling process after hot rolling, forming an iron oxide layer.
2. Shedding of iron oxide scale: Due to the low strength of iron oxide scale, it is easy to fall off during transportation and storage. Once the iron oxide scale falls off, the underlying titanium plate will be exposed, causing scratches and unevenness on the surface of the titanium plate.
3. Impact on the performance of the titanium plate: The existence of iron oxide scale will affect the surface quality of the titanium plate and will also have a certain impact on the mechanical properties of the titanium plate. If the iron oxide scale is not effectively removed, various problems will occur during the use of the titanium plate, such as poor welding, poor coating effect, etc.
In order to solve the oxide scale defects of hot-rolled titanium plates, the following measures can be taken:
1. Optimize the hot rolling process: By adjusting the hot rolling process parameters, reduce the rolling temperature and rolling speed, reduce the contact area and contact time between the titanium plate surface and oxygen, thereby reducing the generation of iron oxide scale.
2. Strengthen cooling process control: During the cooling process after hot rolling, measures such as water mist cooling or vacuum cooling can be used to reduce the chance of contact between the titanium plate surface and oxygen and reduce the formation of iron oxide scale.
3. Surface treatment technology: After hot rolling, surface treatment technology, such as pickling, sandblasting, mechanical polishing, etc., can be used to remove the iron oxide scale on the surface of the titanium plate and improve the surface quality of the titanium plate.
In short, the occurrence of scale defects in hot-rolled titanium plates is closely related to the hot-rolling process and post-processing process. By optimizing the hot rolling process and strengthening the control of the cooling process, the generation of scale can be reduced.