Steel sheet and method for manufacturing same
By controlling the chemical composition and heat treatment process of martensitic steel plates, steel plates with sufficient ductility and low yield strength ratio were prepared, solving the application problem of martensitic steel plates in automotive parts and achieving a balance between high strength and low yield strength ratio.
Patent Information
- Application Number
- CN202480042150.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2024-04-09
- Filing Date
- 2024-05-10
- Publication Date
- 2026-01-20
AI Technical Summary
Although martensitic steel sheets are easy to achieve high strength, they have insufficient ductility and a high yield strength ratio, making them difficult to apply to automotive parts. Existing technologies have failed to effectively improve their ductility and reduce their yield strength ratio.
By controlling the chemical composition of the steel plate, including the content of elements such as C, Si, Mn, Al, P, S, and N, and limiting the number density of carbides with an aspect ratio of 2.0 or higher, combined with specific heat treatment processes such as heating, quenching, and tempering, a tempered martensitic structure with a content of more than 95% is formed, thus preparing a martensitic steel plate with sufficient ductility and a low yield strength ratio.
It achieves sufficient ductility and low yield strength ratio in martensitic steel plates, ensuring the strength and machinability of the steel plates, making them suitable for automotive parts and meeting safety and lightweight requirements.
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Abstract
Citation Information
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