Bainitic stainless steel based on laterite nickel ore and method for manufacturing same
By using the smelting and controlled cooling process of laterite nickel ore and ferritic stainless steel scrap, combined with ultra-low carbon and alloy element design, the problems of insufficient strength, plasticity and corrosion resistance of bainitic stainless steel have been solved, and efficient and low-cost production of bainitic stainless steel has been achieved.
CN121915340BActive Publication Date: 2026-06-05福建青拓特钢技术研究有限公司
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- 福建青拓特钢技术研究有限公司
- Filing Date
- 2026-03-23
- Publication Date
- 2026-06-05
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Figure CN121915340B_ABST
Abstract
A ferrite stainless steel based on laterite nickel ore and a manufacturing method thereof, the composition of the ferrite stainless steel is as follows: C 0.01~0.03%, Si 0.2~0.6%, Mn 0.5~1.5%, P≤0.045%, S≤0.015%, Cr 10.50~11.8%, Ni 0.5~1.0%, Mo 0.01~0.1%, N 0.01~0.05%, the balance being Fe and other inevitable impurities, and satisfying: corrosion resistance index: Cr-16*(C-0.05)+3.3*Mo+16*N≥11.0; and the isothermal transformation time T B of the ferrite transformation≤1000 min. The ferrite stainless steel has a yield strength≥750 MPa, a tensile strength≥1000 MPa, an elongation≥10%, a hardness HRC 32~36, and a corrosion rate in 3.5% NaCl salt spray for 72 h≤0.15 g / m 2 / h.
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