Composition for surface treatment of steel sheet, plated steel sheet surface-treated using same, method for producing same, and hot-formed member

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By coating zinc-plated steel sheets with a combination of inorganic and organic compounds to form a surface treatment film layer, the friction problem and the slow heating problem of hot forming of zinc-plated steel sheets are solved, thereby improving lubricity and formability, while reducing process costs and CO2 emissions.

CN122270596APending Publication Date: 2026-06-23POHANG IRON & STEEL CO LTD

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Patent Information

Application Number: CN202480074608.0
Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner
Priority Date: 2023-12-15
Filing Date: 2024-12-11
Publication Date: 2026-06-23

Application Information

Patent Timeline

15 Dec 2023

Priority

11 Dec 2024

Application

CN202480074608.0

23 Jun 2026

Publication

CN122270596A

IPC: C23C22/00; C23C2/26; C23C2/06; C23C2/12; C25D3/22; C09D1/00; C09D7/63

CPC: C09D1/00; C09D7/63; C23C2/06; C23C2/12; C23C2/26; C23C22/00; C25D3/22

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Application Domain

Hot-dipping/immersion processes

Technology Topics

Metallurgy Thermoforming

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AI Technical Summary

Technical Problem

Existing technologies for the surface treatment of zinc-plated steel sheets suffer from friction problems and slow heating rates during hot forming. Furthermore, the processes are complex and require sophisticated equipment, failing to meet the lubricity, weldability, and hot forming requirements of automobile manufacturing.

Method used

A surface treatment composition for steel plates containing inorganic and organic compounds is used to form a surface treatment film layer through coating and drying, which improves lubricity and shortens the heating time for hot forming.

Benefits of technology

It significantly improves the lubricity and cold formability of zinc-coated steel sheets, reduces the heating time for hot forming, lowers process costs, and reduces CO2 emissions.

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Abstract

The present invention relates to a surface-treated steel sheet suitable for use as a material for a sheet material for an automobile, and more particularly, to a composition for surface treatment of a plated steel sheet, a plated steel sheet surface-treated with the composition, a method for manufacturing the same, and a thermoformed member.

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