Cold rolling process: a fine shaper of the surface quality of titanium alloy bars

In the processing chain of metal materials, cold rolling is an important link in improving the surface quality of titanium alloy bars. This process not only involves the transformation of physical form, but also profoundly affects the microstructure and performance of the material.

As a key process in the production of titanium alloy bars, cold rolling is a process of plastic deformation of the material at room temperature or near room temperature. This process is not only a fine-tuning of the size and shape, but also a comprehensive upgrade of the surface quality. Compared with hot rolling, the cold rolling environment is more stable, which can effectively avoid adverse factors such as surface oxidation and phase change that may occur at high temperatures, thereby retaining and improving the original quality of the material.

During the hot rolling process, the surface of titanium alloy bars may produce defects such as scale and cracks due to high temperature, friction and other factors. These defects not only affect the aesthetics of the product, but also may reduce its mechanical properties and corrosion resistance. Cold rolling can effectively remove these surface defects through continuous extrusion and extension at room temperature. During the cold rolling process, the material is subjected to uniform mechanical action, the uneven parts of the surface are gradually smoothed, and the cracks are repaired, thereby obtaining a smoother and flatter surface.

In addition to eliminating surface defects, cold rolling can also improve the hardness and wear resistance of the material by refining the surface grains. During the cold rolling process, the titanium alloy bar is subjected to strong plastic deformation, which causes the internal grains to break, elongate and rearrange. This process not only refines the grain structure of the material, but also forms a dense hardened layer on its surface. This hardened layer has higher hardness and better wear resistance, and can effectively resist erosion and wear from the external environment, thereby extending the service life of the material.

The high-quality surface brought by cold rolling not only improves the aesthetics of the titanium alloy bar, but also significantly enhances its corrosion resistance. The smooth and flat surface reduces the contact area and residence time with the corrosive medium, reducing the possibility of corrosion. At the same time, the refined surface grains and the formed hardened layer also improve the chemical stability and corrosion resistance of the material, allowing the titanium alloy bar to maintain good performance in harsh environments.

Cold rolling is an important technical means to improve the surface quality of titanium alloy bars. It achieves a comprehensive upgrade of the material surface quality by eliminating surface defects, refining surface grains, improving hardness and wear resistance, and other methods. This high-quality surface not only improves the aesthetics and market competitiveness of the product, but also provides a reliable guarantee for its application in high-end fields such as aerospace, construction engineering, and medical equipment. With the advancement of science and technology and the continuous optimization of processes, cold rolling will play a more important role in the production of titanium alloy bars, promoting the development of this high-performance material to a higher level.