Spa-h container plate with eliminated inclusion defects and method for producing the same

By optimizing chemical composition and process parameters, especially the precise control of Ti element and low-temperature heating, the problem of surface inclusion defects in SPA-H container panel production was solved, achieving stable production with high quality and low cost, and improving product qualification rate and production efficiency.

CN122128635APending Publication Date: 2026-06-02HANDAN IRON & STEEL GROUP CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HANDAN IRON & STEEL GROUP CO LTD
Filing Date
2026-02-10
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

The existing SPA-H container panel production has surface inclusion defects, mainly caused by unreasonable composition design and mismatched process parameters, which affect product qualification rate and production stability.

Method used

By optimizing the chemical composition (controlling the content of elements such as Ti, Als, N, Cr, and Cu) and process synergy (low-temperature heating, optimization of 7-pass roughing, finishing, and coiling parameters), the generation of inclusion defects can be suppressed. Specific measures include precise control of Ti element and the combined use of low-temperature heating process.

Benefits of technology

The surface quality of SPA-H container panels has reached 100% first-class level, the mechanical properties meet the requirements of the container industry, production efficiency has increased by 15-20%, and the cost has been reduced by 8-12 yuan/ton of steel.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention discloses a SPA-H container panel with inclusion defects and its production method. Its chemical composition and weight percentage are as follows: C: 0.060%–0.100%, Si: 0.26–0.35%, Mn: 0.40–0.49%, P: 0.080–0.095%, S≤0.010%, Cu: 0.25–0.31%, Cr: 0.30–0.37%, Ni: 0.060–0.075%, Ti: 0.010–0.035%, Als: 0.015–0.035%, N≤0.0055%, with the balance being Fe and unavoidable impurities. The production method includes slab heating, rough rolling, finish rolling, and coiling. This invention effectively suppresses Cr and Cu alloy enrichment and nitride precipitation by optimizing the composition and process matching, reducing the incidence of inclusion defects, and is suitable for large-scale stable production of container panels.
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