(1) On the rolling operation line, the steel bars can be strengthened by controlling the cooling work, replacing the quenched and tempered steel bars that are reheated for quenching and tempering.

(2) Using carbon steel and low-platform gold steel, and adopting a post-rolling controlled cooling process, steel bars of different strength levels can be produced, which may change the traditional production method of grading steel types by hot rolling, save alloy elements, and reduce costs. cost and ease of management.

(3) The equipment is simple, no need to modify the rolling equipment, only a set of water-cooling equipment needs to be installed after the finishing mill.

(4) Cracks often nucleate where dislocations accumulate in the active slip zone.

The rolling waste heat quenching with the effect of low-temperature deformation heat treatment increases the dislocation density and prevents the multilateral changes of the dislocation substructure, thereby forming a core that promotes cracks.