ผงโลหะผสมไทเทเนียมโมลิบดีนัม enhance high-temperature strength and creep resistance for lightweight aerospace designs. This guide reviews TiMo alloy powder compositions, key characteristics, production methods, suitable applications, specifications, purchasing considerations, supplier comparisons, and pros/cons.
ผงโลหะผสมไทเทเนียมโมลิบดีนัม องค์ประกอบทั่วไป
| Alloy Grade | Titanium (%) | Molybdenum (%) |
|---|---|---|
| Ti-6Al-7Nb (IMI 550) | สมดุล | 7% |
| Ti-15Mo-3Nb-3Al-0.2Si | สมดุล | 15% |
| Ti-11.5Mo-6Zr-4.5Sn (Ti-11) | สมดุล | 11.5% |
| Ti-15Mo-5Zr-3Al | สมดุล | 15% |
Molybdenum levels between 7% and 15% effective for high-temperature strengthening. Other elements like niobium, zirconium, and tin further boost creep properties.
Characteristics and Properties
| คุณลักษณะ | รายละเอียด |
|---|---|
| รูปร่างอนุภาค | Spherical from inert gas atomization |
| Oxygen ppm | Below 500 ppm |
| Typical density | 4.5 g/cc |
| การนำความร้อน | 4-6 W/mK |
| ความแข็งแรงของอุณหภูมิสูง | 100 MPa at 500°C |
| ความต้านทานการกัดกร่อน | Forms protective TiO2 film |
Particulate nature, low oxygen content and tailored compositions suit alloy powder for additive manufacturing or sintering high performance components.
วิธีการผลิต
| วิธี | Process Description |
|---|---|
| การทำให้เป็นอะตอมก๊าซ | Inert gas disintegrates molten alloy stream into powder |
| การทำให้เป็นอะตอมพลาสมา | Very clean but lower powder output vs gas atomization |
| รับเชิญ | Spheroidization of existing powders by remelting |
| Hydride-dehydride | Brittle TiH2 intermediate for comminution |
Plasma and gas atomization offer the best quality while being more expensive vs secondary routes like PREP and HDH.
Applications of TiMo Alloy Powder
| อุตสาหกรรม | ตัวอย่างส่วนประกอบ |
|---|---|
| การบินและอวกาศ | Turbine blades, casings, landing gears |
| การผลิตไฟฟ้า | Heat exchangers, steam piping |
| การแปรรูปเคมี | Bioreactors, reaction vessels |
| นาวิกโยธิน | Propeller shafts, sonar domes |
| Oil and gas drilling | Geothermal well tools and shafts |
Combination of high strength, low weight and corrosion resistance suits TiMo alloys with demanding environments like aircraft engines or offshore drilling.
ข้อกำหนด
| มาตรฐาน | Grades Covered |
|---|---|
| ASTM B862 | Ti-6Al-2Sn-4Zr-6Mo, Ti-8Al-1Mo-1V, Ti-6Al-2Nb-1Ta-0.8Mo |
| ASTM B348 | Titanium and titanium alloy bars and billets |
| AIMS 04-18 | Standard for AM titanium parts |
AMPM (American Powder Metallurgy) Institute, IPS (International Powder Metallurgy Standards Organization) also cover various Ti grades.
Global Suppliers and Price Range
| บริษัท | เวลานำ | การกำหนดราคา |
|---|---|---|
| TLS Technik | 16 weeks | $300 – $900/kg |
| Sandvik | 12 weeks | $350 – $1000/kg |
| Atlantic Equipment | 14 weeks | $320 – $850/kg |
Pricing for 100+ kg batch. Premium for low oxygen and spherical powder. Larger quantities above 500 kg offer 20%+ discounts.
ข้อดีกับข้อเสีย
| Advantages | ความท้าทาย |
|---|---|
| ความแข็งแรงของอุณหภูมิสูงที่ดีเยี่ยม | High raw material costs |
| Corrosion resistant in many environments | Longer lead times for custom alloys |
| Custom alloy design flexibility | Limited global supply chain presently |
| Compatible with powder AM methods | Post-processing often needed after AM |
| ความต้านทานการคืบที่ยอดเยี่ยม | Stringent requirements on oxygen/nitrogen |
TiMo powders enable new component designs and lightweight construction but using titanium alloys poses unique powder manufacturing and handling challenges.
คำถามที่พบบ่อย
What particle size range is optimal for binder jet 3D printing?
Around 30 to 50 microns facilitates higher powder bed density and efficient liquid saturation needed to bind layers properly. Too fine powders hurt performance.
What causes contamination during Ti alloy gas atomization?
Oxygen pickup from any air leaks degrades powder purity hence the need for stringent process controls. Furnace parting agents and melt crucibles are other contamination sources requiring high purity consumables.
Why is high Mo content difficult to achieve in Ti based alloys?
Excessive evaporation losses of molybdenum occur above 25% levels during vacuum induction melting and subsequent remelting steps. Mitigation measures include covering melt pools or using cold crucible techniques.
How should titanium powder be stored?
Inside sealed containers under inert cover gas or vacuum. Handled and stored to exclude moisture absorption which causes decrepitation and high osyggen or nitrogen impurity.
What are common defects when AM printing titanium alloys?
Porosity from trapped gas atoms, lack of fusion defects, residual stress cracking, unfused powder trapped inside enclosed volumes. Require integrated parameters optimisation accounting for scan strategy, energy input etc.
บทสรุป
In summary, ผงโลหะผสมไทเทเนียมโมลิบดีนัม provide customized high temperature properties and corrosion resistance vital for producing next generation components across aerospace, energy and other demanding industries via powder metallurgy or additive manufacturing.
