Abstract
Shape control is the key technology for thin gauge stainless steel in hot rolling. Because of high rolling force, work roll can suffer from serious uneven wears, edge drop of strip temperature and so on. And in turn these imperfections lead to defects in thin gauge stainless steel production, such as big crown value, quarter wave, edge profile anomalies, poor rolling stability. In order to improve shape the control ability, one will have to eliminate the quarter wave, make roll wear uniform, increase rolling stability in the thin gauge stainless steel production, use high performance variable crown technology in upstream stands, use mixed variable crown technology in last stand, and use conventional work roll with variable shifting stroke strategy in other downstream stands. The above technologies have been successfully applied in several stainless steel productions, which have completely independent intellectual property rights, and the crown control precision of thin gauge stainless is 98.1%, flatness control precision is 97.5%, also a 1260 mm × 1.6 mm ultra-thin gauge stainless steel was successfully developed.
Highlights
Stainless steel is widely used in aerospace, petroleum, mechanical, chemical industry, biology and other fields because it is corrosion resistant, has high toughness and plasticity, and it is non-magnetic etc
Due to greater deformation resistance and poor hot ductility, big rolling force and fast temperature drops are a significant characteristic of the thin gauge stainless steel in hot rolling, this leads to serious shape problem and poor rolling stability, such as large crown value, anomalies at strip edge area and quarter wave
In upstream stands of hot strip finishing mill, the main function is crown control, and flatness control is required in downstream stands [3]
Summary
Stainless steel is widely used in aerospace, petroleum, mechanical, chemical industry, biology and other fields because it is corrosion resistant, has high toughness and plasticity, and it is non-magnetic etc. Due to greater deformation resistance and poor hot ductility, big rolling force and fast temperature drops are a significant characteristic of the thin gauge stainless steel in hot rolling, this leads to serious shape problem and poor rolling stability, such as large crown value, anomalies at strip edge area and quarter wave. In upstream stands of hot strip finishing mill, the main function is crown control, and flatness control is required in downstream stands [3]. The work roll design targets are different between upstream and downstream stands according to different requirements. In order to improve the shape control capability, eliminate the quarter wave, make uniform work roll wear, and increase rolling stability in the thin gauge stainless steel production. The high performance variable crown work roll was developed and used in upstream stands, whereas the mixed variable crown work roll was developed and used in last stand, conventional work roll was used in the other stands with variable stroke shifting strategy technology
Sign-in/Register to view highlights & summary 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.
