Cause analysis of steel plate bulge defects:
1. Problems in the production process
During the production process of steel plates, if the boiler water pressure is too high, it will cause excessive hydrogen inside the steel plate, forming pores. These pores pile up together to form a bulge defect. In addition, under the condition of too long insulation time, the metal grains on the surface of the steel plate will deform, resulting in bulges on the surface.
2. Problems in the processing process
During steel plate processing, if it is subjected to excessive pressure or bending force, it will deform, resulting in bulge defects on the surface. In addition, the poor quality of the cutting tools used in processing and the excessive speed will also cause damage to the surface of the steel plate, thereby forming bulge defects.
3. Problems in the transportation process
During the transportation of steel plates, if they are severely impacted or squeezed, it will cause bulges on the surface. Especially when there is shock or bumps during the transportation of steel plates, it is more likely to cause bulge defects.
Solutions to steel plate bulge defects:
1. Strengthen production management
Strengthening management during the production process is the key to preventing steel plate bulge defects. It is necessary to control the boiler water pressure and ensure the rationality of the heating time to avoid problems such as excessive hydrogen and grain deformation.
2. Strengthen processing and testing technology
Strengthen the quality control of processing technology, use appropriate cutting tools, and reasonably control the processing speed to avoid damage to the steel plate surface during processing. In addition, strict testing and screening of steel plates are carried out to eliminate hidden dangers and reduce the incidence of bulge defects.
3. Strengthen transportation management
It is also important to strengthen the management and control during transportation. Before transportation, it is necessary to fully package and fix it to prevent vibration or bumps during transportation, which may cause bulge defects of steel plates.
The occurrence of steel plate bulging defects is a very common phenomenon, but as long as we strengthen the management of production, processing and transportation, control hidden dangers from the source, and reasonably use technical means and tools, we can effectively prevent and solve this defect problem and improve the quality and efficiency of steel plates.
There are also the following common quality defects of steel plates:
1. Cracks
Cracks are one of the common defects of steel plates, which are mainly divided into two categories: hot cracks and cold cracks. Hot cracks are generated during heat treatment or hot processing of steel plates. The main reasons are large residual stress, coarse grains and uneven distribution of alloy elements in steel; cold cracks are generated during cold processing, bending or forging. Cracks have a serious impact on the performance of steel plates, reducing the strength, toughness and corrosion resistance of steel plates.
2. Bubbles
Bubbles refer to large and small pores inside the steel plate. The main reason is that the oxides or other impurities in the ingot are not completely removed when the molten steel solidifies. Bubbles will affect the strength and toughness of the steel plate, and in severe cases may cause the steel plate to break or break during use.
3. Inclusions
Inclusions refer to foreign matter or non-metallic impurities in the steel plate sandwiched between grains or grain boundaries. The main reason is that impurities such as sulfur and phosphorus in the molten steel are not completely removed. It may also be caused by non-metallic substances entering the molten steel during the production process. Inclusions will affect the toughness and strength of the steel plate. For high-strength steel plates, the impact of inclusions is more obvious.
4. Rust
Rust is the phenomenon of corrosion on the surface of the steel plate, mainly due to the destruction or corrosion of the covering layer on the surface of the steel plate. Rust will reduce the corrosion resistance and service life of the steel plate, and in severe cases will cause the steel plate to lose its original function.
The above are common quality problems of steel plates. The existence of these problems will seriously affect the performance and service life of the steel plate. Therefore, relevant measures should be taken during the production and processing process to minimize the occurrence of these problems.
Read more: What should you Consider when Purchasing Carbon Steel Plates?
1. Problems in the production process
During the production process of steel plates, if the boiler water pressure is too high, it will cause excessive hydrogen inside the steel plate, forming pores. These pores pile up together to form a bulge defect. In addition, under the condition of too long insulation time, the metal grains on the surface of the steel plate will deform, resulting in bulges on the surface.
2. Problems in the processing process
During steel plate processing, if it is subjected to excessive pressure or bending force, it will deform, resulting in bulge defects on the surface. In addition, the poor quality of the cutting tools used in processing and the excessive speed will also cause damage to the surface of the steel plate, thereby forming bulge defects.
3. Problems in the transportation process
During the transportation of steel plates, if they are severely impacted or squeezed, it will cause bulges on the surface. Especially when there is shock or bumps during the transportation of steel plates, it is more likely to cause bulge defects.
Solutions to steel plate bulge defects:
1. Strengthen production management
Strengthening management during the production process is the key to preventing steel plate bulge defects. It is necessary to control the boiler water pressure and ensure the rationality of the heating time to avoid problems such as excessive hydrogen and grain deformation.
2. Strengthen processing and testing technology
Strengthen the quality control of processing technology, use appropriate cutting tools, and reasonably control the processing speed to avoid damage to the steel plate surface during processing. In addition, strict testing and screening of steel plates are carried out to eliminate hidden dangers and reduce the incidence of bulge defects.
3. Strengthen transportation management
It is also important to strengthen the management and control during transportation. Before transportation, it is necessary to fully package and fix it to prevent vibration or bumps during transportation, which may cause bulge defects of steel plates.
The occurrence of steel plate bulging defects is a very common phenomenon, but as long as we strengthen the management of production, processing and transportation, control hidden dangers from the source, and reasonably use technical means and tools, we can effectively prevent and solve this defect problem and improve the quality and efficiency of steel plates.
There are also the following common quality defects of steel plates:
1. Cracks
Cracks are one of the common defects of steel plates, which are mainly divided into two categories: hot cracks and cold cracks. Hot cracks are generated during heat treatment or hot processing of steel plates. The main reasons are large residual stress, coarse grains and uneven distribution of alloy elements in steel; cold cracks are generated during cold processing, bending or forging. Cracks have a serious impact on the performance of steel plates, reducing the strength, toughness and corrosion resistance of steel plates.
2. Bubbles
Bubbles refer to large and small pores inside the steel plate. The main reason is that the oxides or other impurities in the ingot are not completely removed when the molten steel solidifies. Bubbles will affect the strength and toughness of the steel plate, and in severe cases may cause the steel plate to break or break during use.
3. Inclusions
Inclusions refer to foreign matter or non-metallic impurities in the steel plate sandwiched between grains or grain boundaries. The main reason is that impurities such as sulfur and phosphorus in the molten steel are not completely removed. It may also be caused by non-metallic substances entering the molten steel during the production process. Inclusions will affect the toughness and strength of the steel plate. For high-strength steel plates, the impact of inclusions is more obvious.
4. Rust
Rust is the phenomenon of corrosion on the surface of the steel plate, mainly due to the destruction or corrosion of the covering layer on the surface of the steel plate. Rust will reduce the corrosion resistance and service life of the steel plate, and in severe cases will cause the steel plate to lose its original function.
The above are common quality problems of steel plates. The existence of these problems will seriously affect the performance and service life of the steel plate. Therefore, relevant measures should be taken during the production and processing process to minimize the occurrence of these problems.
Read more: What should you Consider when Purchasing Carbon Steel Plates?
