High-strength steel with nanometer, layered and metastable skeletal structure and preparing method thereof

A high-strength steel and bone technology, applied in delaminated and metastable structures, the microstructure is in the nano field, to achieve the effect of increasing plasticity
CN111733367AActive Publication Date: 2020-10-02DONGGUAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DONGGUAN UNIV OF TECH
Publication Date
2020-10-02

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Abstract

The invention relates to high-strength steel with a nanometer, layered and metastable skeletal structure. The steel is prepared from the alloy components in percentage by weight: C: 0.01 to 0.1%, Mn:7.0 to 11.0%, Cu: 1.5 to 4.0%, Ni: 1.0 to 3.0%, Al: 1.0 to 2.0%, and the balance of Fe. The invention further relates to a method for preparing the high-strength steel with the nanometer, layered andmetastable skeletal structure. The method comprises the steps of weighing alloy components, smelting, casting, forging, hot rolling, cold rolling and heat treating process. The purpose of the invention is to provide the high-strength steel with the nanometer, layered and metastable skeletal structure and a preparation method thereof. The material has excellent mechanical properties, low productioncost, wide process window, and has a huge application prospect.
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Description

Technical field

[0001] The invention belongs to the technical field of metal material processing, and relates to a nanostructure, a layered and metastable structure. Background technique

[0002] High-strength steel is a commonly used material and is widely used in the field of automotive materials. However, existing high-strength steels have certain defects. For example, the typical 15-5PH maraging high-strength steel has a tensile strength greater than 1000MPa. The elongation after fracture is 10-20%, and the corrosion resistance is good, but due to its higher alloy cost and moderate plasticity, it is not suitable for automotive steel; the typical third-generation automotive steel is Mn steel, which is resistant to tension The strength is 900-1400MPa, and the elongation after fracture is 20-40%; the comprehensive mechanical properties are very good, but the disadvantage of the medium manganese steel is that the hole expansion rate is low. After the TRIP effect, the crack is eas...

Claims

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