1. Is the cold drawing process of cold drawn section steel performed at normal temperature?
The cold drawing process of cold drawn section steel is performed at normal temperature. Moreover, through this operation, the material can be plastically deformed, thereby increasing its yield point strength.
2. Can cold-drawn round bars in cold-drawn sections be bent?
The cold drawn round steel in the cold drawn steel can be bent because the cold drawn round steel does not exceed the ultimate strength of the material. Therefore, cold drawn round steel can be bent.
3. If there are cracks in cold-drawn section steel, what are the specific reasons?
On cold drawn steel, if the quality of the materials used is unqualified or does not meet the standards, or it contains impurities, or the content of impurities is too large. Then, if it is processed, the processed cold-drawn steel will increase the hardness of the material, so it is prone to problems such as cracking.
4. Why does the surface of cold-drawn steel become hard?
Because cold-drawn steel forms martensite on the surface during cold-drawing, and coupled with plastic deformation, the density of dislocation lines increases, which restricts its further movement due to mutual restrictions. This results in an increase in the hardness of the surface of the cold-drawn section steel.