Empty-bag flipping, commonly called “steel-bag flipping”, is a world-wide phenomenon in the steel industry. But what is steel-bag flipping, why is it occurring, and what are some of the ways to prevent it from occurring?
Steel-bag flipping is the outer surface of the steel bag stands out from the surface of the steel, which can cause the steel bag to be distorted and eventually break. This phenomenon is due to non-uniform cooling of the steel which causes an uneven solidification of the steel and forms a weak spot on the surface. This weak spot can become brittle and can easily be separated from the steel itself.
The most common cause of steel-bag flipping is uneven casting conditions. This can happen when the steel is poured into the casting moulds incorrectly or when the moulds are not preheated correctly. Uneven pouring and preheating result in a uneven cooling of the steel and an uneven solidification, which leads to a weak spot on the steel surface.
Another cause of steel-bag flipping is a variation in heat treatment conditions. Heat treatment is a process used to strengthen the steel by altering its microstructure. If the heat treatment is not done correctly or does not follow the proper protocol, then it can lead to an uneven cooling of the steel and eventually the formation of a weak spot.
To prevent steel-bag flipping from occurring, it is important to have a uniform cooling of the steel, as well as a consistent preheating and heat treatment of the steel. It is important to inspect the steel before and during the casting process to ensure that it is evenly poured and pre-heated. During the heat treatment process, it is important to ensure that the proper protocols and procedures are followed.
It is also important to use quality materials and molds when casting and heat-treating the steel. Quality materials will ensure that the steel bag is formed properly and will not deform or break down over time due to improper cooling. Quality molds will also ensure that the steel is cooled evenly and will not form weak spots on the surface.
Finally, steel-bag flipping can be prevented by using high-speed cooling systems when cooling the steel. High-speed cooling systems help to ensure that the steel cools down evenly and quickly. This will help to reduce the amount of uneven cooling and the formation of weak spots on the steel surface.
In conclusion, steel bag flipping is a world-wide phenomenon in the steel industry. It is important to know the causes of steel-bag flipping and the various ways to prevent it from occurring. By having a uniform cooling of the steel, using quality materials and molds, and using high-speed cooling systems, steel-bag flipping can be prevented.
