Production method of pure titanium hot rolled coil

Through the cross-rolling mode of titanium and steel and the coordinated control of roller speed, the problem of point chain thermal scratches on the lower surface of titanium coils during hot rolling was solved, achieving efficient production and stable surface quality.

CN120679830APending Publication Date: 2025-09-23PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP +1
View PDF 13 Cites 0 Cited by

Patent Information

Application Number
CN202511019508.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-07-23
Publication Date
2025-09-23

AI Technical Summary

Technical Problem

During the hot rolling process of titanium coils, point chain thermal scratch defects are easily generated on the lower surface. It is difficult to effectively avoid them with existing technologies, and temporary grinding of the rollers will interrupt production and may introduce new defects.

Method used

A titanium and steel cross-rolling mode is adopted to coordinately control the roller speed and rolling speed. High-temperature steel is used to repair foreign matter adhering to the roller surface. Steel rolling is carried out in combination with the interval time during the cross-rolling of titanium and steel to avoid sliding between the titanium billet and the roller and ensure a smooth roller surface.

Benefits of technology

It effectively avoids the point chain thermal scratch defects on the lower surface of the titanium coil, reduces the frequency of roller grinding, improves production efficiency, and ensures stable product surface quality.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN120679830A_ABST
    Figure CN120679830A_ABST
Patent Text Reader

Abstract

The invention relates to a production method of a pure titanium hot-rolled coil. The production method comprises the steps of titanium blank heating, rough rolling, finish rolling and coiling. After the titanium blank is heated, the roller way speed from a heating furnace to an R1 inlet and the roller way speed from an R1 outlet to an R2 inlet are kept consistent with the first-pass rolling speed of rough rolling; the rough rolling adopts a titanium and steel cross rolling mode of X1 blocks of titanium and X2 blocks of steel, X1 is smaller than or equal to 2, and X2 is larger than or equal to X1; the speed of the rough rolling last-pass roller way is equal to the speed of the rolling mill, and after the last-pass rolling is finished, the steel is conveyed to finish rolling after passing through a flying shear head. Through cooperation of the roller way speed and the rolling speed and control over the roller way lifting speed, the defect of lower surface point chain-shaped hot scratch caused by relative sliding of a titanium blank and the roller way is avoided, meanwhile, a steel-titanium cross rolling mode is adopted, high-temperature steel is rolled to melt titanium locally attached to the surface of the roller way, the roller surface state is repaired, and the quality of titanium is improved. And the defect of point-chain heat scratch caused by scratching the lower surface by sticky meat in the process is avoided.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Production method for preventing scratch defect of lower surface of hot continuous rolling titanium coil

    CN117732869A

  • Method for producing electrical steel and carbon steel through mixed rolling

    CN102247987A

  • Heating method for industrial pure-titanium square billet

    CN104588408A

  • Control method of medium-thickness plate rolling and conveying speed

    CN105215057A

  • Hot continuous rolling method for industrial pure titanium and titanium alloy

    CN106475415A