Developing of X65 steel coils making at Steckel mill using thermo-mechanical control process

The process of thermo-mechanically controlled rolling in the conditions Steckel mill Ferriera Valsider plant was developed for first time hot-rolled coils sizes 12 mm × 1510 from steel X65 grade further production electric welded pipes according to API-5L standard. provides carrying out roughing-rolling two stages facilitating forming a smaller austenite grain and therefore more dispersed homogeneous inherited ferrite structure finished rolled product. At implementation process, holddown temperature at desired level 1780 has been carried by adjusting number burners furnace coilers. air cooling 400°C after winding technology Steckel’s condition is applied that allowed reduce thickness scale layer improve surface quality. performed research evaluate feasibility operating equipment determine possibility fabrication related nowadays world requirements satisfied demand European electricwelded manufacturers.