Method For Eliminating Residual Stress Of Cold Rolled Ribbed Steel Bars
What are the methods to eliminate the residual stress of cold rolled ribbed steel bars? Or what methods should be used to eliminate the residual stress of cold rolled ribbed bars? According to the technicians of cold rolled ribbed steel machine and cold rolled ribbed steel production line made by Gongyi Jindi Metallurgical Equipment Co., Ltd, there are two kinds of stresses in the ribbed steel bars after cold rolling, that is tensile stress and compressive stress.
The two residual stresses of the cold rolled ribbed steel are balanced under certain conditions, and the wire size and shape are stabilized temporarily. However, due to the elastic aftereffect, the residual stress released by the different parts of the ribbed steel bar will change its shape, and then the whole wire will be deformed, and the earlier the deformation, the greater the damage. Then, since the residual stress has such a great hazard to the cold rolled ribbed steel, what methods should the customer be taken in the production process to eliminate the residual stress of the cold rolled ribbed steel?
1. Using low temperature tempering treatment (200-300 °C), the lattice is rearranged, the internal residual stress is released, and the size and shape of the wire or spring are stabilized for a long time. After all kinds of wires are treated by low temperature tempering, the internal residual stress is eliminated, and the age hardening effect is produced. The actual tensile strength tends to increase by a certain range (5-10%).
2, As far as possible to reduce the unevenness of deformation, specific measures are: reduce the total reduction rate, appropriate reduction of the last reduction rate (12-15%); select the appropriate coating and lubricant to reduce friction.
3. The straightening process is used to transform the potential of elastic deformation into surface plastic deformation, eliminating or reducing the tensile stress on the surface of the wire.
The method of eliminating the residual stress of the cold rolled ribbed steel bar is the above. If you need to roll and produce ribbed steel bars with cold rolled ribbed steel mill or cold rolled ribbed steel production line, you can visit www.jindimachine.com or call:0371-64388822, 13674996266 to consult with us!
Tel: 86+13674996266, 86+37164388822