hot rolled steel plate surface finish,Pros' Market Analysis

hot rolled steel plate surface finish,Hot Rolled Steel Plate Surface Finish: An Overview Hot rolled steel plates are widely used in various industries. One im

Hot Rolled Steel Plate Surface Finish: An Overview

Hot rolled steel plates are widely used in various industries. One important aspect of these plates is their surface finish. The surface finish of a hot rolled steel plate can greatly affect its performance and applications.

Typically, hot rolled steel plates have a rougher surface finish compared to cold rolled ones. This roughness is due to the high - temperature rolling process. During hot rolling, the steel is heated to a high temperature and then passed through rollers. As a result, the surface may have scale, which is a layer of oxides that forms on the surface of the steel during heating.

The surface finish can also be affected by factors such as the quality of the raw material, the rolling parameters, and the cooling process. For example, if the raw material has impurities, it may lead to a less - than - ideal surface finish. Similarly, incorrect rolling parameters like improper pressure or speed can cause surface irregularities.

Surface Finish and Its Impact on Applications

In construction, the surface finish of hot rolled steel plates is important. A rougher surface may provide better adhesion for coatings or concrete. For example, when using hot rolled steel plates as reinforcement in concrete structures, the rough surface helps the concrete bond more effectively. However, in some applications where aesthetics are important, such as in architectural facades, a smoother surface finish may be preferred. This may require additional processing like grinding or polishing to improve the appearance.

In the manufacturing of machinery, the surface finish can affect the wear and tear of parts. A rough surface may cause more friction, which can lead to faster wear. On the other hand, a very smooth surface may not be suitable for all types of machinery as it may lack the necessary grip for some components to function properly.

Improving the Surface Finish

There are several methods to improve the surface finish of hot rolled steel plates. One common method is pickling, which involves removing the scale from the surface using acid. This not only improves the appearance but also prepares the surface for further processing such as painting or coating. Another method is shot blasting, where small particles are shot at the surface at high speed to clean and smooth it to some extent.

Grinding and polishing are also used to achieve a smoother surface finish. However, these methods can be costly and time - consuming, especially for large - scale production. Therefore, manufacturers need to balance the cost and the required surface finish for their specific applications.

Questions and Answers

Question 1: How does the rolling process affect the surface finish of hot rolled steel plates?

Answer: During the hot rolling process, the steel is heated and passed through rollers. This high - temperature process can cause the surface to be rough and may form a layer of scale, which affects the surface finish.

Question 2: What are the common methods to improve the surface finish of hot rolled steel plates?

Answer: Common methods include pickling (removing scale with acid), shot blasting (using high - speed particles to clean and smooth), grinding, and polishing.