Hot rolled steel plate
By controlling the porosity in the width direction of the plate in high-strength hot-rolled steel plate, the problem of uneven strength in the width direction of the steel plate is solved, and high yield and design freedom of complex-shaped components are achieved.
CN116234935BActive Publication Date: 2025-03-21NIPPON STEEL CORPORATION
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Patent Information
- Application Number
- CN202180060549.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Priority Date
- 2020-09-29
- Filing Date
- 2021-08-10
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2041-08-10
AI Technical Summary
Technical Problem
In the prior art, when manufacturing components of complex shapes, uneven strength in the plate width direction of the steel plate leads to cracking, which reduces the yield rate.
Method used
By controlling the pore reaming rate in the plate width direction in a high-strength hot-rolled steel sheet, a specific formula relationship is satisfied to ensure uniform pore reaming properties in the plate width direction.
Benefits of technology
It effectively suppresses the cracking of steel plates in the manufacturing process of complex shape components, improves the yield rate, and improves the freedom of design.
✦ Generated by Eureka AI based on patent content.
Abstract
The present invention provides a hot-rolled steel plate having a tensile strength of 780 MPa or more, a plate thickness of 1.2 to 4.0 mm, a plate width of 750 mm or more, and satisfying ‑15≤(λ W1 +λ W2 ) / 2‑λ C ≤15(where λ W1 and W2 It represents the hole expansion ratio (%) at the position of 1 / 8 of the width of the hot-rolled steel sheet at one end and the other end on the opposite side in the width direction perpendicular to the rolling direction, λ C It represents the hole expansion ratio (%) at the center of the plate width.
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