Policy & Regulation

Two Mandatory National Standards for Dust Explosion Protection Take Effect on November 1: Dry Dust Collectors for Metal Powder Additive Manufacturing Must Adopt Atmosphere Inerting

2026-11-01

Effective November 1, two mandatory national standards—the Safety Specification for Inerting of Combustible Dust (GB 37241-2025) and the Safety Specification for Explosion Protection of Combustible Dust Removal Systems (GB 17919-2025)—officially come into force, under the administration of the Ministry of Emergency Management. GB 17919-2025 upgrades the previously recommended standard GB/T 17919-2008. Clause 4.12 requires that dry dust collectors used in metal powder additive manufacturing (3D printing) involving aluminum, magnesium, titanium, and other metal powders adopt atmosphere inerting measures. It also prohibits electrostatic precipitators and gravity settling chambers; for magnesium and aluminum dust systems, carbon dioxide-based explosion suppressants are strictly prohibited, and monitoring and alarms for differential air pressure, temperature, liquid level, and oxygen content must be installed and interlocked with the control system. For powder production and AM workshops, full-chain retrofitting of dust removal systems and upgrading of inerting monitoring have become hard compliance requirements. A self-inspection and rectification window is now open for dust-handling enterprises, and demand for related equipment and monitoring retrofits is expected to be released in concentrated form.

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两项粉尘防爆强制性国标11月1日实施：金属粉末增材制造干式除尘器须采取气氛惰化

11月1日起，《可燃性粉尘惰化安全规范》（GB 37241-2025）与《可燃性粉尘除尘系统防爆安全规范》（GB 17919-2025）两项强制性国家标准正式实施，由应急管理部归口。GB 17919-2025由推荐性标准GB/T 17919-2008升级，第4.12条要求铝、镁、钛等金属粉末增材制造（3D打印）的干式除尘器采取气氛惰化措施；同时禁止电除尘器与重力沉降室，镁铝粉尘系统严禁二氧化碳类抑爆剂，须设风压差/温度/液位/氧含量监测报警并与控制系统联锁。对粉末生产与AM车间，除尘系统全链条改造与惰化监测升级成为合规硬约束，涉粉企业自查整改窗口开启，相关装备与监测改造需求将集中释放。

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2026-11-02

Multiscale Characterization Study on the Formation Mechanism of Lamellar Phases in Tungsten Heavy Alloys Fabricated by Laser Powder Bed Fusion

On November 1, 2026, the journal Materialia published a study titled "Hierarchical phase formation in tungsten heavy alloys fabricated via laser powder bed fusion," which systematically revealed the non-equilibrium solidification microstructural characteristics of 90W-7Ni-3Fe tungsten heavy alloy fabricated by laser powder bed fusion (LPBF) using multiscale characterization methods. SEM imaging showed position-dependent thermal gradient variations during the LPBF process. EBSD analysis indicated that the alloy exhibits a randomly oriented equiaxed grain structure with no preferred texture, an average grain size of approximately 10.75 μm, and an average geometrically necessary dislocation density of 3.06×10¹³ m⁻². Submicron γ precipitates and nanopores of approximately 100 nm were observed within W grains. Selected area electron diffraction confirmed the orientation relationship [011]W∥[001]γ between BCC W and FCC γ phases. TEM directly observed, for the first time, high-density dislocation pile-ups in LPBF tungsten heavy alloy and revealed nanoscale Fe₂W Laves phase precipitates in some matrix regions that had not been previously reported in conventional powder metallurgy processes. Although Fe₂W is generally regarded as a brittle phase, its presence as nanoscale precipitates is expected to strengthen the tungsten alloy through the Orowan mechanism. Tungsten heavy alloy (WHA) is a dual-phase composite composed of tungsten with elements such as nickel and iron, and is widely used in aircraft engine flywheels, rotors, counterweights, medical radiation shielding, and plasma-facing components of fusion reactors. Conventional powder metallurgy processes such as liquid-phase sintering are mature, while additive manufacturing has become an emerging alternative route owing to its near-net-shape capability for complex components. This study lays the foundation for establishing process–microstructure–property relationships for AM tungsten heavy alloys and for promoting microstructure-driven design.

2026-11-01

Studio 3e8 Launches $3,500 Desktop Metal 3D Printer Mesa 1: Powder Direct Extrusion + Built-in Sintering Solution

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2026-11-01

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