Pass rolling technology and characteristics of titanium alloy bar, wire and profile

Pass rolling is a process in which a rolling force is applied to a metal material through a rotating roll to make it undergo plastic deformation. In the pass rolling process of titanium alloy, the rolled piece (that is, the titanium alloy material to be machined) is fed between rotating rolls and gradually deformed under the extrusion of the roll until the desired shape and size are reached.

The pass rolling of titanium alloy bars, wires and profiles has the following significant characteristics:

1. uneven deformation Due to the difference between the shape of the rolled piece and the hole, the natural extension of the rolled piece at each point along the width direction will be inconsistent, resulting in uneven deformation. This kind of uneven deformation may affect the mechanical properties and surface quality of the material, so it is necessary to strictly control the rolling parameters and pass design during the rolling process to ensure the uniform deformation of the material.

2.The thermal conductivity of titanium is relatively low, which means that heat is not easily dispersed from the deformation area during the rolling process. When the deformation rate is fast, the parts with severe deformation are prone to overheating, which may lead to changes in the microstructure of the material, thereby affecting its mechanical properties and corrosion resistance. Therefore, it is necessary to take appropriate cooling measures during the rolling process to reduce the temperature of the material and prevent the occurrence of overheating.

3.High production efficiency but tool complex pass rolling method has the advantage of high production efficiency, because multiple rolling passes can be completed at one time, thus reducing production cycles and costs. However, rolling tools are relatively complex and need to be precisely designed and manufactured to ensure pass accuracy and stability. In addition, for titanium alloy profiles with many varieties and small batches, a large number of passes of different specifications and shapes are needed. After changing the pass, it is necessary to adjust and calibrate the rolling mill, which is time-consuming and time-consuming, and increases the production cost. Therefore, titanium alloy profiles are mostly not produced by pass rolling methods, but by other processing methods that are more suitable for small batch production.

4.In the process of pass rolling of titanium alloy, the transverse spread (that is, the amount of deformation in the width direction of the rolled piece) is larger than that of steel. This means that more attention needs to be paid to the deformation of the rolled parts in the width direction during the rolling process to avoid the problem of excessive or insufficient width. At the same time, this feature also needs to be fully considered in the design of the pass to ensure that the rolled out material has the required shape and size.

In summary, the pass rolling technology of titanium alloy bars, wires and profiles has the advantages of high production efficiency and wide application range, but at the same time there are some challenges and limitations. In order to give full play to the advantages of pass rolling technology and overcome its limitations, it is necessary to optimize the rolling process and equipment design and improve the processing quality and production efficiency of materials.