Steel continuous casting method

By dynamically controlling the rolling reduction gradient and speed phases post-casting completion, the method enhances the quality of cast pieces by preventing center segregation and internal cracking, addressing the challenges faced in existing continuous casting methods.

EP4527521A1Pending Publication Date: 2025-03-26JFE STEEL CORP
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Patent Information

Application Number
EP2023830817
Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2022-06-28
Filing Date
2023-04-26
Publication Date
2025-03-26

AI Technical Summary

Technical Problem

In continuous casting, the quality of cast pieces deteriorates after casting completion due to center segregation and internal cracking, as existing methods fail to set appropriate rolling reduction conditions during this period.

Method used

A steel continuous casting method that involves changing the rolling reduction gradient in segments after casting completion, with specific speed control phases (deceleration, head solidification, and acceleration) to maintain a rolling reduction speed within a predetermined range, expressed by certain inequalities involving casting speed and rolling reduction gradient.

Benefits of technology

This method improves the quality of cast pieces by preventing center segregation and internal cracking, allowing for efficient production of steel products with varied specifications.

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Abstract

Provided is a steel continuous casting method capable of improving the quality of a cast piece cast in the period after the casting completion. A steel continuous casting method of performing continuous casting while a cast piece (3) is subjected to rolling reduction includes subjecting a cast piece (3) being continuously cast to rolling reduction and, after the casting completion, changing a rolling reduction gradient in a segment (14) of applying the rolling reduction, to control a rolling reduction speed within a predetermined range.
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Citation Information

Patent Citations

  • Continuous casting method for steel

    JP2003071552A

  • JPH390259A

  • JPH390263A

  • JPH7112255A

  • JPH8132203A