Application of Hydrogen in Powder Metallurgy

Hydrogen plays a crucial role in powder metallurgy, supporting key stages such as powder pretreatment, compaction, sintering, and post-processing. It mainly serves as a protective atmosphere and a reducing gas, ensuring product quality and stable production.

I. Application Stages

Powder Pretreatment: Used to remove impurities and moisture from metal powders, preparing them for subsequent processing.

Compaction: Provides a protective atmosphere to prevent oxidation of powders under high temperature and pressure.

Sintering: Acts as a reducing atmosphere, preventing oxidation and reducing oxides, enabling densification and improving overall performance.

Post-Processing: Protects sintered products from oxidation during cooling and cleaning, maintaining superior quality.

II. Hydrogen Quality Requirements

Purity: ≥99.99% (vol.) to minimize impurities and guarantee product consistency.

Moisture Content: Dew point ≤ -60 ℃ to ensure dryness and avoid porosity or density reduction during sintering.

III. Value Proposition

Energy Efficiency
Hydrogen improves reaction efficiency during sintering and reduction, shortens process time, and reduces overall energy consumption, helping enterprises lower production costs.

Improved Quality
With high-purity and low-moisture hydrogen environments, oxidation and impurity formation can be effectively prevented. This enhances the densification, mechanical strength, and corrosion resistance of sintered products, ensuring consistency and stability.

Environmental Sustainability
The only combustion product of hydrogen is water. Compared with conventional fossil fuels, hydrogen is a much cleaner energy source that helps reduce CO₂ emissions and supports green manufacturing and low-carbon development.