Effect of cooling water through the pipe welding process performance

Welded square tube water cooling technology: controlled cooling device installed after the finishing mill, the use of rolling after finishing fast deformation, immediately rapidly cooled by welded square tube deformation induced phase transition, the control bars under high temperature grain growth, thereby obtaining fine ferrite grain by grain refinement, and comprehensively improve the mechanical properties of steel. The controlled cooling device in three sizes: small size there are three lines, test Φ12, Φ14, Φ16, Φ18mm rebar when using; middle tier specifications, test Φ20, Φ22, Φ25mm rebar when use; there are large-sized line, test Φ28 , use Φ32mm rebar. This can be achieved by means of water, water pressure adjustment, water temperature after wearing controls to make steel give good mechanical properties. Controlled cooling of steel does not require, the use of the output roller.

Reasonable control of welded square tube heating temperature, as well as optimum temperature control effect test, water pressure, start the pump number, serial number, and a cooler cooling line to open the number of segments are set to satisfy the premise of steel tempering temperature .

Experimental data show that the use of square tube welded roll water cooling process to produce welded pipe, without adding alloying agents or significantly reduce added, mechanical properties and product quality fully meet the national standards. The use of water cooling technology can reduce the cost per ton of steel about 50 yuan, considerable benefits. After the implementation of water cooling technology, not only can refine the grain, improve the organization, improve the mechanical properties of steel, and can reduce or even eliminate the bubbles steel surface oxidation, improve product surface quality while reducing steel elbow, raise the rate of length.

Post time: Sep-17-2019