Abstract
During the last years international steel producers have been following a market trend to develop and produce new steel grades with higher strength and larger thickness. When attempting to improve the metallurgical properties in the cooling section, the existing cooling equipment in hot strip mills often reaches its limit. Primetals Technologies offers its Power Cooling solution to upgrade existing cooling lines as well as for new hot strip mills. With this type of equipment highest cooling rates can be achieved and therefore steel producers are capable of producing new steel grades with higher strength at lower costs. A new power cooling system was installed immediately behind the finishing mill gauge house at Wuhan Iron and Steel Company’s (WISCO) HSM No. 2 in Wuhan, China. The Power Cooling system widens the product range and gives WISCO the capability to produce high-strength steel grades (AHSS) with strength levels of more than 1,000 MPa, e.g. HSLA steel or as-hot-rolled multi-phase steel. Due to the extremely wide control range of the flow rate, the installation allows for maximum metallurgical flexibility. On the other hand, the new equipment allows for the most economic production of line-pipe material like API X80 in a thickness range up to 25.4 mm (1 inch).
Highlights
Following market demands currently the general trend is to produce advanced steel grades either with higher strength or larger thickness at reduced costs compared to conventional production
When using lean chemistry approaches high cooling rates become important for virtually all advanced steel grades
In order to cover the emerging field of hot rolled multi-phase steels such as TRIP grades, accurate temperature-time path control is needed in a range where the Leidenfrost effect – an insulating steam layer between hot strip surface and cooling water is established - becomes dominant, i.e., fast and homogeneous cooling is of vital interest in the late cooling stage
Summary
Following market demands currently the general trend is to produce advanced steel grades either with higher strength or larger thickness at reduced costs compared to conventional production. This includes all kinds of AHSS such as DP (Dual-Phase), CP (Complex-Phase), TRIP (Transformation Induced Plasticity), fully-martensitic steels or HSLA grades (e.g. API X70, X80). In order to account for above mentioned production strategies, one of the appropriate products on the market is the Primetals Power Cooling system. This system has recently been installed at HSM no.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
