Proszek ze stopu niklu X750

Nickel Alloy X750 to utwardzany wydzieleniowo stop niklowo-chromowy zapewniający doskonałą odporność na korozję i utlenianie. Charakteryzuje się zachowaniem wytrzymałości, ciągliwości i plastyczności po utwardzaniu wydzieleniowym oraz niezwykłą wytrzymałością w wysokich temperaturach.

X750 ma dobrą formowalność w stanie wyżarzonym i może być łatwo wytwarzany przy użyciu standardowych praktyk formowania warsztatowego. Może być łatwo kuty lub w inny sposób obrabiany na gorąco. Formowanie na zimno nie nastręcza szczególnych problemów. Charakteryzuje się również doskonałą spawalnością.

Oto przegląd właściwości i zastosowań proszku Nickel Alloy X750:

Niskie MOQ

Zapewnij niską minimalną ilość zamówienia, aby spełnić różne potrzeby.

OEM I ODM

Dostarczanie niestandardowych produktów i usług projektowych w celu zaspokojenia unikalnych potrzeb klientów.

Odpowiednie zapasy

Zapewnienie szybkiego przetwarzania zamówień oraz niezawodnej i wydajnej obsługi.

Zadowolenie klienta

Dostarczanie wysokiej jakości produktów, których podstawą jest zadowolenie klienta.

Udostępnij ten produkt

Spis treści

Przegląd

Proszek ze stopu niklu X750 is a precipitation-hardenable nickel-chromium alloy that offers excellent resistance to corrosion and oxidation. It is noted for retaining strength, toughness and ductility after age hardening and has remarkable high temperature strength.

X750 ma dobrą formowalność w stanie wyżarzonym i może być łatwo wytwarzany przy użyciu standardowych praktyk formowania warsztatowego. Może być łatwo kuty lub w inny sposób obrabiany na gorąco. Formowanie na zimno nie nastręcza szczególnych problemów. Charakteryzuje się również doskonałą spawalnością.

Oto przegląd właściwości i zastosowań proszku Nickel Alloy X750:

Skład:

  • Nickel: 70%
  • Chromium: 15%
  • Iron: 7%
  • Titanium and Aluminum additions

Właściwości:

  • Doskonała odporność na korozję i utlenianie
  • Retains high strength and toughness up to 1300°F (704°C)
  • Age hardenable
  • Easy to fabricate
  • Dobra spawalność

Zastosowania:

  • Gas turbines components
  • Turbocharger components
  • Heat treating fixtures
  • Nuclear fuel element spacers
  • Chemical and food processing equipment

Types and Designations

Nickel Alloy X750 powder is available with different particle size distributions:

TypWielkość cząstek
Klasa dokładności15-45 μm
Klasa średnia45-106 μm
Gatunek gruboziarnisty106-250 μm

It also has several standard specifications and designations:

  • UNS N07750
  • WNR 2.4668
  • AMS 5667
  • ASME SB-171
  • ASTM B640

Skład i właściwości

The typical composition and properties of Nickel Alloy X750 powder are:

Tabela 1: Chemical composition of Nickel Alloy X750 powder

ElementComposition (%wt)
Nikiel (Ni)70.0 min
Chrom (Cr)14.0-17.0
Żelazo (Fe)5.0-9.0
Tytan (Ti)0.7-1.2
Aluminium (Al)0.2-1.0
Węgiel (C)0.08 max
Mangan (Mn)1.0 max
Krzem (Si)1.0 max
Miedź (Cu)0,5 maks
Siarka (S)0,015 maks
Fosfor (P)0,015 maks

Tabela 2: Physical properties of Nickel Alloy X750 powder

NieruchomośćWartość
Gęstość8.36 g/cc
Temperatura topnienia2400-2550°F (1315-1399°C)
Przewodność cieplna9.4-12.4 W/m-K (68-218°F)
Moduł sprężystości31 x 106 psi
Rezystywność elektryczna617 μΩ-cm
Współczynnik rozszerzalności cieplnej8.1 x 10-6/°F (14.6 μm/m-°C)

Tabela 3: Mechanical properties of Nickel Alloy X750 powder

Właściwości mechaniczneWartość
Wytrzymałość na rozciąganie190-240 ksi (1310-1655 MPa)
0.2% Yield Strength140-190 ksi (965-1310 MPa)
Wydłużenie10-22%
TwardośćRockwell C 35-45

Aplikacje i zastosowania

Some of the key applications for Nickel Alloy X750 powder include:

Tabela 4: Applications of Nickel Alloy X750 powder

PrzemysłZastosowania
Lotnictwo i kosmonautykaGas turbine engine components, Turbocharger components
MotoryzacjaExhaust valves and components
PrzemysłowyHeat treating fixtures and trays
Ropa i gazWellhead components, valves, pumps
ChemicznyReactor vessels, piping, heat exchangers
Przetwarzanie żywnościPressure vessels, evaporators
JądrowyFuel element spacers and springs

The excellent heat and corrosion resistance make X750 suitable for use in high temperature environments seen in gas turbines, turbochargers, industrial furnaces and other extreme applications up to 1300°F (704°C).

Its high strength is valuable for components under mechanical stresses like valves, pumps and high pressure vessels and piping.

The outstanding room temperature tensile, yield, and creep-rupture properties in combination with oxidation resistance and fabricability provide proven advantages for many critical chemical processing industry applications.

Specyfikacja i dostępność

Nickel Alloy X750 powder is readily available from leading global specialty metal suppliers in various size distributions:

Tabela 5: Nickel Alloy X750 powder sizes and dimensions

TypWielkość cząstek**ASTM Screen Size **
Ultrafine1-5 μmNIE DOTYCZY
Dobrze15-45 μm-325 mesh
Średni45-106 μm140-325 mesh
Gruboziarnisty106-250 μm-140 mesh

Tabela 6: Indicative pricing for Nickel Alloy X750 powder

TypStanCena ($/kg)
Proszek-325 Mesh$75 – $150
Proszek140-325 Mesh$50 – $120
Proszek-140 Mesh$45- $100

Pricing can vary based on quantity and exact specifications. Contact leading manufacturers and suppliers for custom quotes.

Comparison with Alloy 718

Nickel Alloy X750 is part of the high-performance nickel-chromium family with similar compositions to the popular Alloy 718.

Here is a comparison between Alloy X750 and Alloy 718 powders on key parameters:

Tabela 8: Nickel Alloy X750 vs. Alloy 718 Comparison

NieruchomośćX750718
Gęstość (g/cc)8.368.19
Melting Range (°F)2400-25502300-2350
Wytrzymałość na rozciąganie (ksi)190-240160-220
Wytrzymałość na pełzanieLepiejDobry
WytrzymałośćLepiejUmiarkowany
SpawalnośćDoskonałyUmiarkowany
Odporność na korozjęDoskonałyUmiarkowany
Odporność na utlenianieDoskonałySłaby
KosztUmiarkowanyInexpensive
DostępnośćUmiarkowanyReadily Available

In summary, Alloy X750 demonstrates:

  • Higher creep strength for high temperature serviceability
  • Better fabricability and weldability for ease of manufacture
  • Significantly improved corrosion and oxidation resistance
  • Moderate cost premium over 718

Alloy X750 is the preferred choice for extreme environments while Alloy 718 offers a more economical solution for less critical applications.

Zalety i ograniczenia

Some of the main advantages and limitations of Nickel Alloy X750 powder include:

Tabela 9: Advantages of Nickel Alloy X750 powder

Zalety
Excellent room temperature tensile, yield and rupture strength
Retains tensile strength up to 1300°F (704°C)
Resistant to creep and thermal fatigue cracking
Outstanding resistance to corrosion in reducing and oxidizing media up to 1800°F (982°C)
Excellent oxidation resistance up to 2200°F (1204°C)
Good formability in annealed state
Readily forged or hot worked
Easy to weld using conventional methods

Processing and Manufacturing

Nickel Alloy X750 powder can be processed into finished components using various methods:

Casting

  • Investment casting is commonly used. Ceramic molds enable pouring at 2600-2800°F (1427-1538°C). Produces highly sound castings.
  • Sand casting can also be done but extra feeding of liquid metal is needed to get soundness. Special sand binders may be required.
  • Shell mold casting yields products comparable to investment cast. Thin rolls can be produced.
  • Continuous casting in graphite molds is widely used for producing billets for further processing.

Tabela 11: Casting specifications

ProcesRozmiaryTolerancjeFinishes
Investment0.1-100 lbs± 0.030 in/inAs-cast, HIP
Sand25-2000 lbs± 0.125 in/inAs-cast, ground
Shell0.5-75 lbs± 0.060 in/inAs-cast
Continuous Cast3-12 in dia billets± 0.125 in/in diaHot worked

Typical casting defects like hot tears, microporosity and segregation can occur but can be minimized by proper gating/risering, mold design and pouring/shakeout practices.

Deformation Processing

Hot working is performed between 2150-2300°F (1177-1260°C) followed by air cooling. Warm working is done below 1900°F (1038°C). Cold working may require intermediate annealing.

Common methods include:

  • Forging: Closed die process produces best properties
  • Rolling: Both flat and shape rolling performed. Minimum thickness reduction 30%
  • Extrusion: Excellent properties achieved in sections up to 8 in dia
  • Drawing: Heavy wire/bar can be drawn. Intermediate softening may be needed.

Tabela 12: Key specifications

MetodaSize rangesReductionsFinishes
Kucie0.1-1000 lbs30-90%Hot worked
Rolling0.05-500 lbs30-80%Hot band
Wytłaczanie0.5-500 lbs75-90%As extruded
Drawing0.003-3 in dia30-65%Bright annealed

Joining Processes

All standard methods can effectively join X750 parts. Matching alloys preferred for optimum properties.

Spawanie: Gas tungsten arc (GTAW) and gas metal arc welding (GMAW) most widely employed. Resistance and laser beam welding also occasionally applied. Matching composition filler rods are used. Joints exhibit excellent strength. Proper preheat and post weld heat treatment essential to avoid cracking.

Lutowanie: Vacuum brazing gives best combination of strength and temperature resistance. Various silver braze alloys used with brazing done at 1900-2000°F (1038-1093°C). Critical to control clearances, fluxes and atmosphere.

Table 13: Joining recommendations

ProcesMetodyFiller MetalsKomentarze
SpawanieGTAW, GMAWAlloy 625, 725Observe maximum interpass temps
LutowaniePróżniaSilver brazesFluxless preferred
CladdingRoll bondingStopy miedziHot roll plated
FasteningBolting, rivetingAlloy X750Use cold worked holes

Post Processing Treatments

Solution heat treating and age hardening are used to develop optimum properties:

Solution Treatment – Performed at 2100-2300°F (1149-1260°C) followed by air or water quenching. Enables subsequent age hardening.

Age Hardening – Age at 1325-1425°F (± 25°F) for 10-50 hours followed by air cooling. Achieves precipitation hardening for maximum strength levels.

Optional stabilization treatment involves 850-1200°F for 1-16 hours to stabilize against future property changes.

Table 14: Post processing specifications

ProcesLeczenieExpected Properties
Solution Treating2150°F (1177°C), 30 min, ACOptimized microstructure
Age Hardening1350°F (732°C), 24 hrs, AC190-240 ksi UTS
Stabilization1000°F (538°C), 4 hrs, ACStable hardness

Produkcja proszku

Nickel Alloy X750 powder is commercially produced by gas atomization and water atomization methods. Particle size distribution tightly controlled through specialized nozzles and calibrated sieving. High purity inert gas used to prevent contamination.

Table 15: Powder production methods

ProcesRozmiaryRateCzystość
Atomizacja gazu10-250 μm30-200 kg/hr99.9%
Atomizacja wody25-150 μm20-100 kg/hr99.7%

Both gas and water atomized powders show spherical particle morphology ideal for additive manufacturing, metal injection molding and other powder metallurgy applications.

Design Data

Key design data parameters for Nickel Alloy X750 are summarized below for reference during engineering and component design activities:

Table 16: Design data parameters for Nickel Alloy X750

KategoriaWartościKomentarze
Gęstość0.302 lb/in3Moderate weight
Moduł Younga30.8 x 106 psiSztywność
Współczynnik Poissona0.294
Moduł ścinania11.7 x 106 psiResistance to shape change
Rezystywność elektryczna617 μΩ-cmHigher resistance than copper
Współczynnik tarcia0.46-0.80Varies based on surface finish
Przewodność cieplna113-124 BTU-in/hr-ft2-°FHigher than stainless steels
Ciepło właściwe0.106 BTU/lb-°F
Mean CTE7.3 x 10-6 in/in-°FAverage between RT-500°F
Prandtl Number0.012Ratio of momentum diffusivity to thermal diffusivity
Heat Transfer Coefficient120-200 BTU/hr-ft2-°FDepends on environment

Structural Load Conditions

For structural engineering calculations at temperature extremes, use:

  • Tensile yield strength: 140-190 ksi
  • Compressive yield strength: 170-220 ksi
  • Modular ratio, E (Alloy X750)/E (Steel): 1.0

At room temperature up to 500°F – Moderate corrosion rate of less than 0.002 in/yr expected.

Up to 1900°F – Excellent resistance to hot corrosion and oxidation. Use parabolic rate constant kp = 3.4 x 10-8 mg2/cm4/s.

Creep and Fatigue Resistance

Alloy X750 demonstrates excellent creep resistance. Rupture strength higher than 80 ksi for 100,000 hrs at 1300°F (980°C).

For cyclic fatigue conditions, use:

  • Endurance (106 cycle) fatigue strength of 95-100 ksi
  • Reduction factor of 1.0 for machined surface finish rather than as-fabricated

Environment has small effect on fatigue strength. Use fatigue reduction factor = 0.95 for air environment.

Machining Nickel Alloy X750

Nickel Alloy X750 has excellent machinability in the annealed state and can be machined using most standard workshop methods and tools.

Chip breakers recommended for effective chip control. Rigid setups needed to minimize vibration. Positive rake cutting tools with sharp cutting edges provide longest tool life.

Low thermal conductivity leads to heat concentration so copious coolant should be used.

Table 17: Machining methods

MetodaTool MaterialsSpeeds/FeedsKomentarze
TurningHigh speed steel, Carbide, Ceramic, CBN, PCD100-250 sfmUse heavy depths of cut
WiercenieCarbide with TiAlN coating10-30 sfmPeck drill larger diameters
ThreadingCarbide inserts4-10 iprMaintain tool nose radius
FrezowanieCarbide,

Processing and Manufacturing

Nickel Alloy X750 powder can be processed into parts using various methods:

Wytwarzanie przyrostowe

Additive manufacturing (AM), also known as 3D printing, uses the nickel alloy powder as feedstock for building up components layer by layer. Some AM techniques suitable for X750 include:

Bezpośrednie spiekanie laserowe metali (DMLS)

  • Powder is selectively melted by a high power laser
  • Produces fully dense parts with fine microstructure
  • Excellent dimensional accuracy and surface finish
  • Możliwe złożone geometrie

Topienie wiązką elektronów (EBM)

  • Powder is melted by an electron beam in vacuum
  • Achieves near full density with good strength
  • Lower surface finish compared to laser processes
  • Fast build rates due to higher beam power

Binder Jetting

  • Liquid bonding agent selectively deposited to join powder particles
  • Cost-effective process with high productivity
  • Requires post-processing like sintering and infiltration
  • Larger parts possible with good geometric freedom

Cold Spray

  • Powder particles accelerated to supersonic speeds and impacted on to a substrate
  • Kinetic energy bonds particles to surface
  • Thick coatings and freeform shapes can be built up
  • Minimal heating preserves base material properties

Tabela 11: Additive manufacturing processes for Nickel Alloy X750

ProcesPrecyzjaWykończenie powierzchniWłaściwości mechaniczneGeometriaPrędkość
DMLSWysokiDoskonałyPredictableKompleksSlow
EBMWysokiUmiarkowanyConsistentKompleksUmiarkowany
Binder jetUmiarkowanySłabyZmiennaSimpleSzybko
Zimny sprayNiskiRoughAnisotropicSimpleSzybko

Parameters like laser power, beam size, hatch spacing, and scanning strategy can be optimized to control part density, surface quality, microstructure and mechanical performance.

Heat treatments like hot isostatic pressing (HIP) and aging may be applied post-processing to further enhance densification and material properties.

Casting

The X750 alloy can also be induction melted and cast into ingots, billets and bars using processes like:

  • Próżniowe topienie indukcyjne
  • Electroslag remelting
  • Odlewanie inwestycyjne

Cast products serve as feedstock for subsequent breakdown operations like forging, rolling and extrusion. They can also be machined directly into net shape components.

Deformation Processing

Various deformation techniques can be applied to cast nickel alloy feedstock:

Kucie

  • Pressing or hammering cast ingots between dies
  • Improves strength through grain flow and work hardening
  • Near net shapes can be achieved

Rolling

  • Compressing and reducing thickness between rolls
  • Produces sheets, strips and plates
  • Controls grain structure and enhances properties

Wytłaczanie

  • Forcing through a die opening
  • Forms long sections with fixed cross-section
  • Dense product with uniform fine grains

Drawing

  • Pulling through a die using tensile force
  • Reduces cross-section of bars, tubes or wires
  • Zwiększona wytrzymałość i twardość

The alloy is annealed periodically during working to restore ductility and avoid cracking. Final heat treatment and aging follows to achieve desired characteristics.

Najczęściej zadawane pytania

Q: What is Nickel Alloy X750?

A: X750 is a precipitation-hardenable nickel-chromium alloy with excellent strength up to 1300°F (700°C), outstanding corrosion and oxidation resistance, and good fabrication characteristics.

Q: What are the typical applications for X750?

A: Gas turbines components, turbocharger parts, nuclear fuel elements, chemical processing equipment, food processing vessels – anywhere needing capability at high temperatures in harsh environments.

Q: Is Nickel Alloy X750 weldable?

A: Yes, X750 has good weldability for a high-strength precipitation-hardened alloy. Gas tungsten arc and gas metal arc welding can produce sound welds. Stress relieving heat treatment is often employed after welding.

poznaj więcej procesów druku 3D

Uzyskaj najnowszą cenę

Aby wypełnić ten formularz, włącz obsługę JavaScript w przeglądarce.