Bästa inconel 718-pulver för 3D-utskrift

Inconel 718-pulver (IN718) är ett välkänt nickelbaserat superlegeringspulver som används i stor utsträckning i högförädlade tekniska applikationer som jetmotorer inom flygindustrin och ånggeneratorer i kärnkraftverk samt inom försvars- och marinsektorn.

Metallpulver Storlek Kvantitet Pris/kg Storlek Kvantitet Pris/kg
Inconel 718 0-20 μm 1KG 60.9 53-105 μm 1KG 59
10KG 39.8 10KG 38
100KG 34.5 100KG 33

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Översikt över Inconel 718-pulver

Inconel 718 is a precipitation hardenable nickel-based superalloy powder widely used for additive manufacturing across aerospace, oil & gas, power generation and automotive industries. This article provides a detailed guide to Inconel 718 powder.

Key aspects covered include composition, properties, AM print parameters, applications, specifications, suppliers, handling, inspection methods, comparisons to alternatives, pros and cons, and FAQs. Tables are used to present information in an easy-to-reference format.

Composition of Inconel 718 Powder

The composition of Inconel 718 is:

Element Vikt % Syfte
Nickel 50 – 55 Huvudmatriselement
Krom 17 – 21 Oxideringsbeständighet
Järn Balans Förstärkare för fast lösning
Niob 4.75 – 5.5 Härdning genom utfällning
Molybden 2.8 – 3.3 Förstärkning av fast lösning
Titan 0.65 – 1.15 Hårdmetallformare
Aluminium 0.2 – 0.8 Härdning genom utfällning
Kol 0,08 max Hårdmetallformare

Trace amounts of cobalt, boron, copper and magnesium are also added to enhance properties.

Egenskaper hos Inconel 718 pulver

Key properties of Inconel 718 include:

Fastighet Beskrivning
Hög hållfasthet Tensile strength 1050 – 1350 MPa
Fasstabilitet Retains strength after prolonged use up to 700°C
Korrosionsbeständighet Resistant to aqueous corrosion and oxidation
Svetsbarhet Readily weldable with matching filler
Tillverkningsbarhet Easy to form and machine
Krypbeständighet High stress rupture strength at high temperatures

The properties make Inconel 718 suitable for the most demanding applications.

AM Print Parameters for Inconel 718 Powder

Typical parameters for printing Inconel 718 powder include:

Parameter Typiskt värde Syfte
Höjd på lager 20 – 50 μm Balans mellan hastighet och upplösning
Laserkraft 195 – 350 W Tillräcklig smältning utan avdunstning
Skanningshastighet 700 – 1300 mm/s Density versus build rate
Avstånd mellan luckor 80 – 160 μm Mekaniska egenskaper
Stödstruktur Minimal Enkel borttagning
Varm isostatisk pressning 1120°C, 100 MPa, 3h Eliminera interna hålrum

The parameters depend on factors like build geometry, temperature management and post-processing needs.

Applications of 3D Printed Inconel 718 Parts

Inconel 718 parts made by AM are used in:

Industri Komponenter
Flyg- och rymdindustrin Turbine blades, disks, hot section parts
Olja & gas Downhole tools, valves, pumps
Kraftproduktion Combustion cans, transition ducts
Fordon Turbocharger wheels, exhaust valves
Medicinsk Ortopediska implantat, kirurgiska verktyg

Benefits over wrought parts include complex geometries and reduced buy-to-fly ratios.

Specifications of Inconel 718 Powder for AM

Inconel 718 powder must meet the following specifications for 3D printing:

Parameter Specifikation
Partikelstorleksintervall 10 - 45 μm
Partikelns form Sfärisk morfologi
Skenbar densitet > 4 g/cc
Tappdensitet > 6 g/cc
Hall flödeshastighet > 23 sekunder för 50 g
Renhet >99,9%
Syrehalt <100 ppm

Custom size distributions and controlled composition available.

Leverantörer av Inconel 718 pulver

Prominent Inconel 718 powder suppliers include:

Leverantör Plats
Praxair USA
Carpenter Pulverprodukter USA
Sandvik Osprey STORBRITANNIEN
LPW-teknik STORBRITANNIEN
Erasteel Frankrike
AP&C Kanada

Prices range from $50/kg to $150/kg, influenced by quality and order quantity.

Met3dp inconel 718 pulver pris

 

Metallpulver Storlek Kvantitet Pris/kg Storlek Kvantitet Pris/kg
Inconel 718 0-20 μm 1KG 60.9 53-105 μm 1KG 59
10KG 39.8 10KG 38
100KG 34.5 100KG 33

Handling and Storage of Inconel 718 Powder

As a reactive material, Inconel 718 powder requires controlled handling:

  • Store sealed containers in a cool, dry inert atmosphere
  • Prevent exposure to moisture, air, temperature extremes
  • Use properly grounded equipment during transfer
  • Avoid dust accumulation and ignition sources
  • Lokal avgasventilation rekommenderas
  • Följ tillämpliga säkerhetsriktlinjer

Correct storage/handling prevents composition changes or hazards.

Inspection and Testing of Inconel 718 Powder

Inconel 718 powder batches are validated using:

Metod Testade parametrar
Analys av siktar Fördelning av partikelstorlek
SEM-avbildning Partikelns morfologi
EDX Kemi och sammansättning
XRD Befintliga faser
Pyknometri Täthet
Hall flödeshastighet Flödbarhet för pulver

Testing per ASTM standards ensures batch-to-batch quality consistency.

Comparing Inconel 718 to Alternative Superalloy Powders

Inconel 718 compares with other alloys as:

Legering Kostnad Utskriftsmöjlighet Svetsbarhet Styrka
Inconel 718 Låg Bra Utmärkt Medium
Inconel 625 Medium Utmärkt Utmärkt Låg
Inconel 939 Mycket hög Rättvist Begränsad Utmärkt
Haynes 282 Hög Bra Begränsad Utmärkt

For balanced properties at lower cost, Inconel 718 supersedes other Ni superalloys for many applications.

Pros and Cons of Inconel 718 Powder for AM

Proffs Nackdelar
Proven material credentials in AM Lower high temperature strength than some alloys
Excellent weldability and machinability Susceptible to solidification cracking during printing
Readily printed into complex shapes Kräver hantering i kontrollerad atmosfär
Cost advantage over exotic superalloys Significant post-processing often required
Available from range of suppliers Relatively low hardness after printing

Inconel 718 enables high performance AM at a reasonable cost.

Frequently Asked Questions about Inconel 718 Powder

Q: What particle size range works best for printing Inconel 718 alloy?

A: A range of 15-45 microns provides the optimum combination of flowability, high resolution, and high density parts.

Q: What post processing is typically required for Inconel 718 AM parts?

A: Hot isostatic pressing, heat treatment, and machining are commonly needed to eliminate voids, optimize properties, and achieve tolerances.

Q: Is Inconel 718 easier to 3D print than other Ni superalloys?

A: Yes, its excellent weldability and lower cracking susceptibility make Inconel 718 one of the easier Ni-based superalloys to process by AM.

Q: What industries use Inconel 718 alloy for metal 3D printing?

A: Aerospace, oil & gas, power generation, automotive, and medical sectors are major applications benefiting from additively manufactured Inconel 718.

Q: Does Inconel 718 require supports when 3D printing?

A: Minimal supports are recommended on overhangs and bridged sections to prevent deformation and allow easy removal after printing.

Q: What defects can occur when printing Inconel 718 powder?

S: Potentiella defekter är sprickbildning, porositet, distorsion, ofullständig sammansmältning och ytjämnhet. De flesta kan förebyggas med optimerade parametrar.

Q: What hardness can be expected with Inconel 718 AM components?

A: Hardness after printing is typically 30-35 HRC. Post-processes like aging can increase it to 40-50 HRC for higher wear resistance.

Q: What accuracy can be obtained with Inconel 718 printed parts?

A: Comparable dimensional tolerances and surface finishes to CNC machined components can be achieved after post-processing.

Q: Is hot isostatic pressing mandatory for Inconel 718 3D printed parts?

A: HIP eliminates internal voids and improves fatigue life. It may not be required for non-critical applications.

Q: What alloy powder has properties closest to Inconel 718 for AM?

A: Inconel 625 has comparable corrosion resistance and weldability to 718 but lower strength. Inconel 939 trades weldability for higher strength.

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