In view of meeting the requirement of railway development for straightness rail,the technology of compound straightening is applied in Panzhihua Iron and Steel CoThe research and application results show that the eligibility percents of the straightness of center and the end of rail are increased,the rail height difference is more small,and the residual stress is also reduced

The traditional whole forging straighting roll was replaced by the high strength,wearable and anti-corrosion welding-up composite straighting roll,and the ident defect of plate surface was eliminated.

Work hardening modulus and reverse bend curvature in plate hot roller leveling;

The FEM analysis for the effect of intermesh to plate leveling deformation;

The results show that the low relaxation PC steel wire can not be tempered or be straightened or be straightened and tempered again, otherwise, the original anti-stress-relaxation property.

To introduce the functions of the over-lay apparatus,the straightener,the traction grooved pulley and the take-up.

Residual Stress Analysis of Oil Casing during Straightening by Finite Element Method;

Finite element simulation of section deflection during H-beam roller straightening;

The present research situations of the roll shape curve of straightening roll;