Introduction to HDH Titanium Powder
Poudre de titane HDH is composed almost entirely of titanium metal, with low oxygen and iron content. It has a high degree of sphericity and flowability.
Key properties and characteristics of HDH titanium powder are summarized below:
Overview of HDH Titanium Powder
| Properties | Details |
|---|---|
| Composition | ≥99.5% titanium |
| Impurities | Low oxygen, iron, nitrogen, carbon, and hydrogen |
| Particle shape | Highly spherical |
| Particle size distribution | Typically 10-45 μm |
| Apparent density | 2.2-2.7 g/cm3 |
| Tap density | 3.0-3.7 g/cm3 |
| Flow rate | 25-35 s/50g |
| Color | Dark gray |
Classification and Specifications
Classification of titanium HDH powder by particle size
| Grade | Particle Size (μm) | Typical Use |
|---|---|---|
| Fine | 10-25 μm | Additive manufacturing, pressing & sintering |
| Medium | 25-45 μm | Pressing & sintering, thermal spray |
| Coarse | 45-106 μm | Thermal spray, welding |
Common specifications as per established standards
- ASTM B299:
Standard Specification for Titanium Sponge
- ASTM B988:
Standard Specification for Powder Metallurgy (PM) Titanium and Titanium Alloy Structural Components
- ASTM F1580:
Standard Specification for Titanium and Titanium-6 Aluminum-4 Vanadium Alloy Powders for Coatings of Surgical Implants
Caractéristiques et avantages
The high purity and spherical morphology make HDH powder suitable for additive manufacturing, metal injection molding, pressing and sintering, thermal spraying, welding, and other fabrications that require high density and quality.
Key benefits over other titanium powder varieties:
- Higher purity with lower interstitial elements
- Improved flowability due to spherical shape
- Better packing density and sinterability
- Excellent mechanical properties
- Good chemical stability at high temperatures
However, HDH powder can be more expensive than other varieties due to the extensive processing required to achieve the purity levels.
HDH titanium powder, with a high purity, can be used across various industries. It is produced via the Armstrong process, a process known as hydrogenation/dehydrogenation (HDH).
Manufacturing Process
The process of titanium HDH powder involves multiple stages:
- Melting: Commercially pure titanium ingots are melted into liquid form. Common feedstocks are titanium sponge, scrap, and alloy ingots.
- Hydriding: The molten titanium reacts with hydrogen gas to produce titanium hydride (TiH2). Cooling and crushing creates brittle titanium hydride chunks.
- Dehydriding: The TiH2 is treated in a vacuum at temperatures above 600°C, decomposing it back into titanium powder and releasing hydrogen. This powder has high oxygen content.
- Vacuum Purification: Multiple vacuum distillation cycles are used to reduce oxygen, nitrogen and hydrogen levels to ≤0.2%, achieving high purity HDH titanium powder.
The HDH process allows precise control over powder characteristics like particle size distribution, morphology, purity level, and microstructure. The powder can be tailored to meet application requirements.
Emballage
Steel drum lined with a plastic bag with a net weight of 50kg and 100kg package along with nationally issued dangerous articles package performance certificate and dangerous articles use certificate, or up on customers’ request.
Transportation & Storage
- It should be transported and stored in a cool and dry place.
- Fire and packaging damage should be avoided.
- Open storage or mixed-up with erosive materials such as acid and alkali are prohibited.
Application
It is an important raw material of cermet, surface coating agents, aluminum alloy additives, electro vacuum getters, spray, plating, etc.
It can be used as the additive of all kinds of metal materials, such as ferro-titanium and titanium aluminium alloy; It can be used for powder metallurgy, like filters, machinery and equipment parts; can be used as human medical products, such as skull shell, heart pacemaker; can be used as luminous agents, such as candle bomb, fire bomb and fireworks.
