Steel for ballistic protection of living beings, devices and / or buildings and devices made thereof
CN122249568APending Publication Date: 2026-06-19SALZGITTER FLASHSTAHL GMBH
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SALZGITTER FLASHSTAHL GMBH
- Filing Date
- 2024-11-22
- Publication Date
- 2026-06-19
AI Technical Summary
Technical Problem
Existing high-strength, extremely hard steel materials are prone to breakage and tearing in ballistic protection, and require a large thickness to provide effective protection, while the forming process is limited.
Method used
It uses multiphase steel with a tensile strength greater than 780 MPa and a hardness less than 330 HB, containing elements such as C, Mn, and Mo. The microstructure has a suitable proportion of martensite and tempered martensite, making it suitable for cold forming to form complex components.
Benefits of technology
It provides high ballistic protection with relatively low material thickness, avoids material breakage and tearing, is suitable for complex molding, and combines with fiber composite materials to improve strength and energy absorption.
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Abstract
This invention relates to the use of steel as a material for ballistic protection of biological and / or equipment and / or buildings, the steel having a tensile strength > 780 MPa, wherein the steel is a multiphase steel with a hardness < 330 HB, and is composed of the following components (in weight percentages): C: 0.08 to 0.35, Mn: 0.80 to 3.50, Mo: 0.10 to 1.00, optionally containing one or more of the following elements: N: 0.0020 to 0.0160, S: to 0.020, Cr: 0.050 to 1.0, P: to 0.050, Cu: 0.001 to 1.0, Si: 0.05 to 1.5, Al: 0.0030 to 1.0, Ni: 0.03 to 1.50, Nb: 0.005 to 0.150, T i: 0.005 to 0.150, V: 0.001 to 0.300, B: 0.0005 to 0.0050, and Ca: 0.0005 to 0.0060, with the remainder being iron and unavoidable impurities, and having a microstructure in which the sum of the volume percentages of martensite, tempered martensite, retained austenite, M / A phase, upper bainite, and / or lower bainite is at least 30.0% by volume, and the remainder is composed of ferrite and pearlite, wherein the volume percentage of ferrite in the microstructure is at least 20.0% by volume. The invention also relates to a device for ballistic protection of biological and / or equipment and / or buildings, comprising at least one planar component, particularly a wall, having at least one steel layer in the ballistic protection zone consisting of steel with a tensile strength > 780 MPa, wherein the steel is a multiphase steel with a hardness < 330 HB.
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