Technology 专利/材料研发 positive

CISRI Files Patent for High-N, Al-Containing 25Cr Duplex Stainless Steel Powder and LPBF Method: Tackling Cracking in High-Nitrogen Powder Laser Powder Bed Fusion

2026-09-04

Central Iron and Steel Research Institute (CISRI) Co., Ltd. has filed an invention patent for "High-Nitrogen, Aluminum-Containing 25Cr Duplex Stainless Steel Powder and Its Laser Powder Bed Fusion Method" (Publication No. CN122669314A; application submitted in July 2026, reported on September 4). The method addresses challenges in LPBF processing of high-nitrogen powders, including melt pool disturbance, nitrogen outgassing, and hot cracking, by optimizing alloy composition to achieve stable fusion and defect-free macro-scale solidification. The institute's move to secure patents in duplex stainless steel LPBF provides a foundational powder grade for additive manufacturing of corrosion-resistant load-bearing components in nuclear power and offshore engineering applications.

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钢铁研究总院申请「高N含Al的25Cr型双相不锈钢粉末及激光粉末床熔融方法」专利：攻克高氮粉末LPBF开裂难题

钢铁研究总院有限公司申请「高N含Al的25Cr型双相不锈钢粉末及其激光粉末床熔融方法」发明专利（公开号CN122669314A，2026年7月申请，9/4公开报道），针对高氮粉末LPBF成形熔池扰动、N逸出与热裂纹难题，通过组分配比实现稳定熔合与无宏观热裂纹成形。央院下场布局双相不锈钢粉末LPBF专利，为核电、海洋工程耐蚀承力件增材提供粉末牌号基础。

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Metal powder grades mentioned in this article — specs, live prices & verified suppliers

316L Stainless Steel Powder

15-45 µm / 15-53 µm

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17-4PH Stainless Steel Powder

15-45 µm / 15-53 µm

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304L Stainless Steel Powder

15-53 µm

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13-8Mo Stainless Steel Powder

15-45 um / 15-53 um

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AlSi10Mg Aluminum Alloy Powder

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AlSi7Mg Aluminum Alloy Powder

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