Ultra high-strength steel Fives’ furnaces change the game

Shougang signing ceremony for UHSS CGL

Shougang Jingtang United Iron & Steel, China again contracted Fives to design and supply a new galvanizing line furnace and inductors dedicated to the production of ultra high-strength steels at its Caofeidian facility.

Ultra high-strength steels (UHSS) are complex materials, with carefully selected chemical compositions and multiphase microstructures resulting from precisely controlled heating and cooling processes. Fives offered its best available technologies: Stein Digiflex® furnace and CELES inductors for this new continuous galvanizing line with 360,000 tons of annual production. 

The Stein Digiflex® furnace will be equipped with a FlashCooling® system operating at 75% of hydrogen in order to reach unrivalled cooling performance. In addition, such system offers flexibility in operation in terms of a cooling rate and temperature cycle control, as well as it enables the uniformity of cooling which is critical for production of the third generation steel grades to meet stringent requirements for the automotive application. The proprietary combustion system AdvanTek® WRT 2.1 features energy efficiency, fuel flexibility and ultra-low NOx emissions, which has become the critical criteria for China’s environmental policy. As a part of a new thermal cycle, the three CELES longitudinal flux inductors for precise adjustment of the thermal processes will permit to produce high value-added steel grades, such as DP, CP, Q&P, etc. Moreover, Fives has engineered a selective oxidation system to accurately control the oxidation process and ensure a perfect coating mandatory for automotive steel grades.  

In total, Shougang Jingtang United Iron & Steel will operate six Fives’ furnaces at the Caofeidian facility, including the new continuous galvanizing line, reaffirming the steelmaker’s target to become a major player among automotive steel producers.