Ti22Al25Nb Powder
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…
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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:
- Very high specific strength (strength-to-weight ratio)
- Excellent high temperature mechanical properties
- Good creep and fatigue strength
- Low density compared to nickel and iron-based superalloys
- ความต้านทานต่อการกัดกร่อนได้อย่างดี
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:
องค์ประกอบ | เปอร์เซ็นต์น้ำหนัก |
---|---|
ไทเทเนียม (Ti) | 22% |
อลูมิเนียม (Al) | 25% |
ไนโอเบียม (Nb) | 5-10% |
วาเนเดียม (V) | 0-5% |
โครเมียม (Cr) | 0-2% |
คาร์บอน (C) | 0-0.2% |
ออกซิเจน (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:
ทรัพย์สิน | มูลค่า |
---|---|
ความหนาแน่น | 3.7-3.9 g/cm3 |
จุดหลอมเหลว | 1350-1450¡«C |
การนำความร้อน | 16-22 W/mK |
ความต้านทานไฟฟ้า | 1.7 Ã×´Î.cm |
โมดุลัสหนุ่ม | 160-180 GPa |
อัตราส่วนปัวซอง | 0.32-0.34 |
ความแข็งแรงเชิงดึง | 500-900 MPa |
จุดคราก | 400-600 MPa |
การยืด | 1-4% |
Creep Strength | 150-300 MPa |
ทนทานต่อออกไซด์ | 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:
- การแปรสภาพเป็นอะตอมของแก๊ส?- High pressure inert gas jet used to atomize molten alloy resulting in fine spherical powder ideal for AM.
- กระบวนการอิเล็กโทรดหมุนพลาสมา (PREP)?- Centrifugal disintegration of rapidly rotating molten metal into fine droplets yields spherical powder.
- การหลอมแบบเชิงกล?- 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:
- การผลิตแบบเติมเนื้อ?- Selective laser melting to produce complex lightweight components like brackets, airfoils, impellers for aerospace and automotive.
- การพ่นสารเคลือบความร้อน?- Applied via plasma or HVOF spraying to provide wear/corrosion resistance for turbocharger blades and aerospace components at high temperatures.
- การฉีดขึ้นรูปโลหะ?- To manufacture small, complex net-shape parts needing high specific strength up to 800¡«C like turbine blades.
- ผงโลหะวิทยา?- 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:
- ขนาดของอนุภาค:?From 15-45 Ã×m for AM methods, up to 100 Ã×m for thermal spray processes.
- ลักษณะ?Near-spherical powder morphology provides optimal flow and packing density.
- ความบริสุทธิ์:?From commercial to high purity levels based on impurity limits and process requirements.
- ปริมาณออกซิเจน:?Levels maintained below 2000 ppm for most applications.
- การไหล:?Powder customized for excellent flow rates above 25 s/50 g.
Global Suppliers of Ti22Al25Nb Powder
Some of the major global suppliers of Ti22Al25Nb powder are:
- AP&C (Canada)
- TLS Technik (จากประเทศเยอรมนี)
- Sandvik Osprey (สหราชอาณาจักร)
- Tekna (แคนาดา)
- ECKA Granules (Germany)
- ผงไทเทเนียม (รัสเซีย)
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:
- ปริมาณ?- $100-150 per kg for bulk orders above 500 kg. Smaller quantities are priced significantly higher.
- Quality?- High purity, spherical powder manufactured under tightly controlled conditions using advanced processes demands premium pricing.
- ซัพพลายเออร์?- Major global suppliers offer cost advantages compared to smaller manufacturers due to higher production volumes.
- Geography?- Prices vary across regions with Europe and North America being higher priced markets compared to Asia.
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
- หลีกเลี่ยงการสะสมของผงละเอียดเพื่อลดความเสี่ยงจากการเกิดฝุ่นระเบิด
- Use proper PPE, ventilation, grounding and safety practices during powder handling
- Prevent contact between powder and ignition sources due to flammability hazard
- ปฏิบัติตามแนวทางความปลอดภัยจาก SDS ของผู้จำหน่าย
Care should be taken when handling this highly reactive alloy powder.
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
- การกระจายขนาดอนุภาค โดยใช้การเลี้ยวเบนของเลเซอร์ ตามมาตรฐาน ASTM B822
- การวิเคราะห์สัณฐานวิทยาผ่านภาพ SEM
- Powder flow rate measurement using Hall flowmeter as per ASTM B213 standard
- การวัดความหนาแน่น โดยการหาความหนาแน่นด้วยฮีเลียม
- Impurity analysis through inert gas fusion or ICP-MS
- Microstructure characterization by X-ray diffraction
Thorough testing ensures batch consistency and powder quality for the intended application.
Comparison Between Ti22Al25Nb and Inconel 718 Powders
Ti22Al25Nb and Inconel 718 powders compared:
พารามิเตอร์ | Ti22Al25Nb | Inconel 718 |
---|---|---|
ความหนาแน่น | 3.7-3.9 g/cm3 | 8.2 g/cm3 |
ความแข็งแรงที่อุณหภูมิสูง | เปรียบเทียบได้ | เปรียบเทียบได้ |
ทนทานต่อออกไซด์ | ดีกว่า | ดี |
ค่าใช้จ่าย | สูงขึ้น | ลดลง |
ความไม่ยืดหยุ่น | จน | ยอดเยี่ยม |
แอปพลิเคชัน | ส่วนประกอบอากาศยาน | การบิน, ยานยนต์ |
ความพร้อมใช้งาน | ปานกลาง | หาได้ไม่ยาก |
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.
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