Hot rolled coils are made of slabs (mainly continuous casting billets), which are heated to form strips from roughing mills and finishing mills. The hot steel strip from the last rolling mill of the finishing mill is cooled to a set temperature by laminar flow, and is rolled into a steel coil by a coiler, and the cooled steel coil is rolled.steel coil manufacturers
Hot rolled coils are made of slabs (mainly continuous casting billets) and heated by roughing mills
The finishing mill is made of strip steel. The hot steel strip from the last rolling mill of the finishing mill is cooled to a set temperature by laminar flow, rolled into a steel coil by a coiler, and the cooled steel coil is subjected to different finishing operations according to different needs of users. Lines (flat, straight, cross-cut or slit, inspection, weighing, packaging and marking) are processed into steel, flat and slit steel strips. Since hot-rolled steel sheet products have high strength, good toughness, easy processing and good weldability, they are widely used in shipbuilding, automobiles, bridges, construction, machinery, pressure vessels and other manufacturing industries.
With the increasing maturity of new technologies such as hot-rolling dimensional accuracy, plate shape and surface quality, and the advent of new products, hot-rolled steel sheets and strip products have become more and more widely used and are becoming more and more powerful in the market. Competitiveness.
Study on New Technology of YAG Laser Splicing of Hot Rolled Coil
The hot-rolled coil of Hi-B steel was tested by laser cutting-welding-heat treatment combined with 4 kW YAG solid-state laser. The changes of weld formation and mechanical properties of joints under different process parameters were explored. The best process parameters are obtained, which solves the problem of high-grade silicon steel hard soldering.
The hot-rolled plate unit adopts a modified Sendzimir annealing process, and the raw material is hot-rolled pickled coil. The production process is as follows:
Hot-rolled pickling plate roll→Unwinding→cutting head→welding→inlet looper→modified Sendzimir horizontal annealing furnace→hot galvanizing→cooling after plating→zinc layer thickness gauge→lighting tension correction→passivation treatment →Checking table→Electrostatic oiling→Winding→Weighing and packing→ Finished product storage