Prášek Ti22Al25Nb

Overview of Ti22Al25Nb Powder

Ti22Al25Nb belongs to the class of titanium aluminide alloys that possess attractive properties like high specific strength, good creep resistance, oxidation resistance, and ability to withstand extreme temperatures. The near-equiatomic ratio of titanium and aluminum provides a balanced combination of light weight, strength and environmental resistance at elevated temperatures.

Key characteristics of Ti22Al25Nb powder include:

• Velmi vysoká specifická pevnost (poměr pevnosti k hmotnosti)
• Excellent high temperature mechanical properties
• Good creep and fatigue strength
• Low density compared to nickel and iron-based superalloys
• Vynikající odolnost proti korozi

Ti22Al25Nb powder has emerged as an excellent choice for reducing weight and improving efficiency in aerospace, automotive, and other high-performance applications at elevated temperatures.

Composition of Ti22Al25Nb Powder

Ti22Al25Nb powder has the following nominal composition:

Element	Hmotnostní %
Titan (Ti)	22%
Hliník (Al)	25%
Niob (Nb)	5-10%
Vanad (V)	0-5%
Chrom (Cr)	0-2%
Uhlík (C)	0-0.2%
Kyslík (O)	0-0.2%

The amounts of strengthening elements like niobium and vanadium can be varied to optimize the mechanical properties. Impurity levels of carbon and oxygen are minimized.

Properties of Ti22Al25Nb Powder

Key properties of Ti22Al25Nb powder include:

Nemovitost	Hodnota
Hustota	3.7-3.9 g/cm3
Teplota tání	1350-1450¡«C
Tepelná vodivost	16-22 W/mK
Elektrický odpor	1.7 Ã×´Î.cm
Youngův modul	160–180 GPa
Poissonův poměr	0.32-0.34
Pevnost v tahu	500-900 MPa
Mez kluzu	400-600 MPa
Prodloužení	1-4%
Creep Strength	150-300 MPa
Oxidační odolnost	Excellent up to 800¡«C

 

The properties like high strength, low density, and temperature capability make it well suited for critical aerospace components needing weight savings.

Production Method for Ti22Al25Nb Powder

Ti22Al25Nb powder can be produced via methods like:

• Plynulá atomizace?- High pressure inert gas jet used to atomize molten alloy resulting in fine spherical powder ideal for AM.
• Procesem s otáčející se plazmovou elektrodou (PREP)?- Centrifugal disintegration of rapidly rotating molten metal into fine droplets yields spherical powder.
• Mechanické legování?- High energy ball milling of elemental/pre-alloyed powders followed by annealing and secondary atomization.

Gas atomization and PREP allow excellent control over powder characteristics like particle size distribution, morphology, and microcleanliness.

Applications of Ti22Al25Nb Powder

Ti22Al25Nb powder is used in:

• aditivní výroba?- Selective laser melting to produce complex lightweight components like brackets, airfoils, impellers for aerospace and automotive.
• Tepelné povlaky?- Applied via plasma or HVOF spraying to provide wear/corrosion resistance for turbocharger blades and aerospace components at high temperatures.
• Metal Injection Molding?- To manufacture small, complex net-shape parts needing high specific strength up to 800¡«C like turbine blades.
• Prášková metalurgie?- Pressing and sintering to create low-density, high-strength parts like connecting rods.

Specifications of Ti22Al25Nb Powder

Ti22Al25Nb powder is available under various size ranges, shapes and purity levels:

• Velikost částic:?Od 15-45 Ã×m u metod AM, až do 100 Ã×m u procesů tepelného nástřiku.
• Morfologie:?Near-spherical powder morphology provides optimal flow and packing density.
• Čistota:?From commercial to high purity levels based on impurity limits and process requirements.
• Obsah kyslíku:?Hladiny udržované pod 2000 ppm pro většinu aplikací.
• Tečení:?Prášek přizpůsobený pro vynikající průtoky nad 25 s/50 g.

Global Suppliers of Ti22Al25Nb Powder

Some of the major global suppliers of Ti22Al25Nb powder are:

• AP&C (Kanada)
• TLS Technik (Německo)
• Sandvik Osprey (UK)
• Tekna (Kanada)
• ECKA Granule (Německo)
• Titanový prášek (Rusko)

These companies produce various grades of Ti22Al25Nb powder tailored for additive manufacturing, thermal spray, powder metallurgy and other applications.

Pricing of Ti22Al25Nb Powder

Ti22Al25Nb powder is priced higher than steels and nickel alloys:

• Množství?- $100-150 za kg pro hromadné objednávky nad 500 kg. U menších množství jsou ceny výrazně vyšší.
• Kvalita?- Vysoce čistý sférický prášek vyráběný za přísně kontrolovaných podmínek pomocí pokročilých procesů vyžaduje prémiové ceny.
• Dodavatel?- Velcí globální dodavatelé nabízejí nákladové výhody ve srovnání s menšími výrobci díky vyšším objemům výroby.
• Zeměpis?- Ceny se v jednotlivých regionech liší, přičemž Evropa a Severní Amerika jsou ve srovnání s Asií trhy s vyššími cenami.

For critical applications, buyers should focus on quality rather than lowest cost while sourcing Ti22Al25Nb powder.

Storage and Handling of Ti22Al25Nb Powder

Ti22Al25Nb powder requires careful storage and handling:

• Should be stored in sealed containers under inert gas like argon to prevent oxidation
• Zabráníte hromadění jemného prášku a minimalizujete tak riziko výbuchu prachu
• Use proper PPE, ventilation, grounding and safety practices during powder handling
• Prevent contact between powder and ignition sources due to flammability hazard
• Postupujte podle příslušných pokynů pro bezpečnost z bezpečnostních listů dodavatele

Při manipulaci s touto vysoce reaktivní práškovou slitinou je třeba dbát zvýšené opatrnosti.

Inspection and Testing of Ti22Al25Nb Powder

Key quality control tests performed on Ti22Al25Nb powder:

• Chemical analysis using ICP-OES or XRF to ensure composition meets specifications
• Distribuce velikosti částic pomocí laserové difrakce podle normy ASTM B822
• Analýza morfologie za pomoci SEM zobrazování
• Powder flow rate measurement using Hall flowmeter as per ASTM B213 standard
• Měření hustoty pomocí pyknometrie helia
• Impurity analysis through inert gas fusion or ICP-MS
• Charakterizace mikrostruktury pomocí rentgenové difrakce

Důkladné testování zajišťuje konzistenci šarží a kvalitu prášku pro zamýšlené použití.

Comparison Between Ti22Al25Nb and Inconel 718 Powders

Ti22Al25Nb and Inconel 718 powders compared:

Parametr	Ti22Al25Nb	Inconel 718
Hustota	3.7-3.9 g/cm3	8,2 g/cm3
Pevnost za vysokých teplot	Srovnatelný	Srovnatelný
Oxidační odolnost	Lepší	Dobré
Cena	Vyšší	Nizší
Zpracovatelnost	Špatné	Výborný
APLIKACE	Aerospace komponenty	Letectví, automobilový průmysl
Dostupnost	Střední	Snadno dostupný

 

Ti22Al25Nb offers weight savings over Inconel 718. But workability is poor and cost is higher for titanium aluminide powder.

Ti22Al25Nb Powder FAQs

Q: How is Ti22Al25Nb powder produced?

A: Ti22Al25Nb powder is commercially produced using gas atomization, plasma rotating electrode process, and mechanical alloying followed by annealing and secondary atomization.

Q: What are the main applications of Ti22Al25Nb powder?

A: The major applications include additive manufacturing, thermal spray coatings, metal injection molding, and powder metallurgy to make lightweight structural parts needing high temperature capability.

Q: What is the typical particle size used in AM?

A: For most metal AM processes, the ideal Ti22Al25Nb powder size range is 15-45 microns with high purity, spherical morphology and good powder flow.

Q: Does Ti22Al25Nb powder require special handling precautions?

A: Yes, it is highly reactive and requires careful handling under inert atmosphere using ventilation, grounding, PPE to prevent fire or explosion hazards.

Q: Where can I buy Ti22Al25Nb powder for aerospace applications?

A: For aerospace parts needing lightweight and high strength, Ti22Al25Nb powder can be sourced from leading manufacturers including AP&C, TLS Technik, Sandvik Osprey, and Tekna.