基于应力梯度加工的无缝钢管
By optimizing the straightening and annealing process parameters through a stress gradient-based seamless steel pipe processing method, the problem of uneven residual stress distribution after cold rolling of seamless steel pipes was solved, achieving more efficient stress relief and consistent product performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA COAL SCIENCE & TECHNOLOGY (TIANJIN) ROCK FORMATION INTELLIGENT CONTROL TECHNOLOGY CO LTD
- Filing Date
- 2026-05-07
- Publication Date
- 2026-07-17
AI Technical Summary
In the current process of straightening seamless steel pipes after cold rolling, the residual stress is unevenly distributed, resulting in poor dimensional stability and resistance to stress corrosion cracking in subsequent processing. Moreover, the existing stress relief methods have failed to effectively balance production economy.
By extracting the axial stress gradient, maximum residual stress, and stress concentration factor of the previous batch of seamless steel pipes, the adjustment value of the straightening machine reduction and the correction value of the annealing temperature are calculated to achieve cross-batch feedforward control and optimize the straightening and annealing process parameters.
It improves the accuracy of residual stress elimination and the consistency of product performance between batches, and enhances the dimensional stability and resistance to stress corrosion cracking of seamless steel pipes.
Smart Images
Figure CN122147030B_ABST