Hot sale 9 410 430 Cold Rolled Stainless Steel Coil is a popular variety in the steel strip market. In recent months, its market price has been relatively stable, and many friends have also taken this opportunity to purchase in large quantities. When processing the steel strip, heat treatment is a very common treatment process. It can improve the processing performance of the steel strip and eliminate internal stress. However, there are also defects in heat treatment. Today, we will focus on heat treatment defects.
The defects of Hot sale 9 410 430 Cold Rolled Stainless Steel Coil heat treatment are mainly manifested in the following aspects:
1. Gas corrosion, irregular black spot-shaped pits will appear on the surface of the steel strip. Especially in the heat treatment process, the surface of the steel strip is left with emulsions, oil and other dirt, which will cause part or even all of the surface of the steel strip to be corroded by gas, especially at high temperatures, the surface of the steel strip is vulnerable to gas corrosion. .
2. Overheating. If the heat treatment temperature is too high, the surface of the steel strip will appear dark brown. In the subsequent treatment, even if the iron oxide scale on the surface has peeled off, it is not easy to pickle clean. When the heating temperature of the steel strip is too high High or long residence time of the steel strip in the furnace can lead to intergranular corrosion.
3. Underheating, during heat treatment, if the temperature is too high, it will affect the treatment effect of the steel strip. Similarly, if the temperature is too low, it will also affect the treatment effect of the steel strip. In the underheated state, the surface of the strip steel will show a light gray metallic luster, which is because it is difficult to wash off the iron oxide scale during pickling. The main reason for underheating is that the heating temperature is too low or the time of the steel strip in the furnace is too short.
4. Scratch, black dot-like pits appear on the surface of the steel strip, especially after pickling, which may be caused by the wear of the surface of the roller table during the heat treatment process. In order to avoid this situation, regular Replace oven rollers.
It can be seen that there are still many defects in the heat treatment of Hot sale 9 410 430 Cold Rolled Stainless Steel Coil, but it does not mean that these defects cannot be solved. As long as the process of heat treatment is strictly controlled, the defects can be greatly reduced.