Specifikace zařízení pro atomizaci kovů

Kov rozprašování is a manufacturing process that turns metal alloys into fine powder. It involves melting the metal and breaking it into droplets using gas or water atomization. The droplets rapidly solidify into powder particles with customized size ranges.

Metal atomization powder has unique properties and is used across industries like automotive, aerospace, biomedical, 3D printing, and more. This article provides a comprehensive overview of metal atomization equipment.

Overview of Metal Atomization Process

Metal atomization uses physical processes to produce fine metallic powders with precise control over particle size, morphology, and microstructure. Here are the key aspects of the metal atomization process:

Parametry	Podrobnosti
Metody	Gas Atomization, Water Atomization
Metal Inputs	Iron, Nickel, Cobalt, Copper, Aluminum alloys etc.
Tání	Induction melting, Arc melting, Electron beam melting
Atomizace	High pressure gas or water breaks molten metal into droplets
Tuhnutí	Rapid cooling rates produce fine powders
Velikost částic	From 10 microns to 250 microns
Tvar částice	Spherical, satellite, irregular shapes
Aplikace	Metal injection molding, Additive manufacturing, Thermal spray powders

The starting point is feeding metal alloys in wire or ingot form into a melting unit. The melt pool is then subjected to high velocity gas or water jets that break it into a spray of metal droplets. As the droplets cool rapidly, they solidify into fine spherical powder particles.

By controlling process parameters like gas pressure, melt flow rate and cooling rate, powders can be customized for flowability, density, size range, morphology and microstructure.

Types of Metal Atomization Equipment

There are two main types of atomization equipment – VIGA (Vacuum Induction Inert Gas Atomization) a Zařízení EIGA (elektrodová indukční atomizace plynu)..

Zařízení VIGA (Vakuová indukční atomizace inertním plynem).

Zařízení VIGA má širokou škálu aplikací, zejména pro výrobu vysoce výkonných práškových materiálů na bázi železa, niklu, kobaltu, hliníku, mědi a dalších pokročilých slitin. Je široce používán v letectví, zdravotnictví, nástrojích, automobilech, strojích, elektronice, nové energetice a dalších oborech a je také vhodný pro aditivní výrobu (3D tisk), nanášení tavením, laserové plátování, tepelné stříkání, práškovou metalurgii, izostatické lisování za tepla a další pokročilé výrobní procesy.

Zařízení EIGA (elektrodová indukční atomizace plynu).

Zařízení EIGA se používá hlavně pro aktivní a žáruvzdorné kovové nebo slitinové prášky, jako jsou titan a slitiny titanu, superslitiny, slitiny platiny a rhodia, intermetalické sloučeniny atd. Prášky jsou široce používány při selektivním laserovém tavení, laserovém tavení, výběru elektronového paprsku plošné tavení, prášková metalurgie atd.

Metal powder produced by Metal Atomization Equipment

Prášek ze slitiny hliníku

Aluminum-based alloy powder refers to finely divided particles composed primarily of aluminum, along with other alloying elements mixed in powder form. These alloying elements are added to modify the properties of aluminum for specific applications. Aluminum-based alloy powders are commonly used in various industrial processes, including additive manufacturing, metal injection molding, powder metallurgy, and thermal spraying.

Here are some of the main types of aluminum-based alloy powders along with their primary alloying elements:

1. Hliník 6061: Contains magnesium and silicon as primary alloying elements. It offers good weldability, high strength, and excellent corrosion resistance.
2. Hliník 7075: Strengthened with zinc as the primary alloying element, along with copper, magnesium, and chromium. Known for its high strength-to-weight ratio, it’s often used in aerospace applications.
3. Hliník 2024: Contains copper as the primary alloying element, along with manganese and magnesium. Offers excellent fatigue resistance and is used in structural applications requiring high strength and machinability.
4. Aluminum 5052: Contains magnesium as the primary alloying element, with chromium and manganese. Known for its excellent corrosion resistance in marine environments, it’s commonly used in sheet metal fabrication.
5. Aluminum 5083: Primarily composed of magnesium, offering excellent corrosion resistance, particularly in seawater. Used in marine applications due to its high strength and weldability.

These are some of the main types of aluminum-based alloy powders, each with specific compositions tailored to meet different application requirements.

Prášek ze slitiny titanu

Titanium-based alloy powder refers to finely divided particles composed primarily of titanium, along with other alloying elements mixed in powder form. These alloying elements are added to modify the properties of titanium for specific applications. Titanium-based alloy powders are commonly used in various industrial processes, including additive manufacturing, powder metallurgy, and thermal spraying.

Here are some of the main types of titanium-based alloy powders along with their primary alloying elements:

1. Prášek Ti-6Al-4V (Titanium 6-4): This is one of the most widely used titanium alloys, containing 6% aluminum and 4% vanadium. It offers excellent strength, corrosion resistance, and biocompatibility, making it suitable for aerospace, medical, and automotive applications.
2. Ti-6Al-2Sn-4Zr-2Mo (Ti-6242): This alloy contains aluminum, tin, zirconium, and molybdenum as the primary alloying elements. It provides high strength, toughness, and creep resistance, often used in aerospace components.
3. Ti-6Al-2Sn-4Zr-6Mo (Ti-6246): Similar to Ti-6242 but with higher molybdenum content for improved strength and creep resistance, especially at elevated temperatures.
4. Ti-6Al-2Sn-4Zr-2Mo-0.1Si (Ti-6242S): This alloy variant includes a small amount of silicon for enhanced weldability and improved mechanical properties, particularly in welded joints.
5. Ti-3Al-2.5V (Ti-3-2.5): Contains 3% aluminum and 2.5% vanadium. It offers good weldability, high strength, and excellent corrosion resistance, commonly used in aerospace and marine applications.
6. Ti-10V-2Fe-3Al (Ti-10-2-3): This alloy contains vanadium, iron, and aluminum, offering high strength and toughness at elevated temperatures. It’s often used in aerospace components subjected to high stress and temperature environments.

These are some of the main types of titanium-based alloy powders, each with specific compositions tailored to meet different application requirements.

Vysokoteplotní slitinový prášek

High temperature alloy powder refers to a type of powdered material composed of various alloying elements, designed to withstand high temperatures and harsh environments while retaining their mechanical properties. These powders are commonly used in additive manufacturing processes like powder bed fusion (such as selective laser melting or electron beam melting) to produce parts for aerospace, automotive, and other industries where high temperatures and corrosion resistance are essential.

Some common types of high temperature alloy powders include:

1. Nickel-Based Alloys:
   • Prášek Inconel 625
   • Inconel 718 prášek
   • Prášek Hastelloy X
2. Cobalt-Based Alloys:
   • Stellite
   • Haynes 188
3. Iron-Based Alloys:
   • Nerezová ocel 316L
   • Prášky z nástrojové oceli

These powders are often chosen based on the specific application requirements such as temperature resistance, corrosion resistance, strength, and other mechanical properties needed for the final part.

Metal Atomization System Design

A complete metal atomization system consists of multiple sub-systems for material handling, melting, atomization, and powder processing.

Sub-Systems in a Metal Atomization Equipment

Sub-System	Role	Použité vybavení
Manipulace s materiálem	Feedstock storage and supply	Hoppers, Conveyors, Feeders
Tání	Melting metal alloy into uniform liquid	Induction furnace, Arc melting furnace, Electron beam melting
Atomizace	Breaking melt into fine droplets	Atomization chamber, Gas/water nozzles
Manipulace s práškem	Separation, cooling, collection and storage	Cyclones, Screens, Conveyors, Bins

Critical factors in designing a metal atomization system include:

• Controlling process parameters like temperature, gas/water pressure, flow rates
• Minimizing melt turbulence before atomization
• Nozzle design and uniform distribution of gas/water jets
• Cooling rate control for desired powder microstructure
• Efficient powder separation from atomizing medium
• Containment of fine powders and minimizing hazards
• Quality control through lab testing and sampling points

Specifikace zařízení pro atomizaci kovů

Technical specifications vary across different capacity systems from lab scale to high production models.

Typical Specifications for Metal Atomization Equipment

Parametr	Typický rozsah
Kapacita	1 kg/hr to 5000 kg/hr
Melting Unit Power	10 kW to 1 MW
Teplota	500°C to 2000°C
Tlak	5 bar to 4000 bar
Velikost trysky	0.5mm to 5mm
Nozzle material	Tungsten carbide, Silicon carbide
Velikost prášku	10 μm to 250 μm
Enclosure	Stainless steel, Alloy steel
Height	2m to 10m
Footprint	2m x 2m to 10m x 4m
Řídicí systém	PLC, SCADA

The capacity, pressure rating, temperature range and footprint increase from lab models to industrial production systems. High precision controls are required to monitor and regulate critical process parameters.

Metal Atomization Equipment Design Standards

Equipment manufacturers follow design codes and standards for critical components to ensure safe and reliable operation.

Relevant Standards for Metal Atomization Equipment

Komponent	Applicable Standards
Tlakové nádoby	ASME SEC VIII Div 1, EN 13445, PD 5500
Potrubí	ASME B31.3, ANSI B16.5
Manipulace s práškem	NFPA 654, EN 14460
Trysky	ASME MFC-7M
Ovládací prvky	IEC 61131, NFPA 79
Strukturální	AISC 360, EN 1993
Material composition	ASTM, DIN, BS, UNS, EN

Compliance with standards related to pressure equipment, combustible dust, controls, materials, and structural fabrication is mandatory. Vendors need to have quality systems and code stamps like ASME U or CE marking.

Applications of Metal Atomization Powders

The unique properties of metal atomization powders make them suitable for some key applications:

Major Applications of Metal Atomized Powders

aplikace	Použité slitiny	Výhody
Vstřikování kovů	Stainless steel, tool steel, copper	High precision, complex parts
Aditivní výroba	Slitiny titanu, hliníku a niklu	Custom alloys, minimal waste
Tepelně stříkané povlaky	Molybdenum, copper, iron alloys	Wear & corrosion protection
Prášková metalurgie	Iron, tungsten heavy alloys	Porous parts, magnets
Aerospace	Niklové superslitiny	High strength engine parts
Biomedicína	Titan, kobaltový chrom	Implantáty pro náhradu kloubů

The microstructure and particle shape influence compressibility, flowability, densification, and sintering response during part making. Gas atomized powders with spherical morphology offer the best performance.

Metal Atomization Equipment Manufacturers

Some leading global manufacturers of metal atomization equipment across small, medium and large scale capacities are:

Prominent Metal Atomization Equipment Manufacturers

Společnost	Umístění	Capacities
MET3DP	Čína	Lab, Pilot, Production scale
EIG	USA	Small to high capacity
Vakuové technologie ALD	Německo	Small lab units
TLS Technik GmbH	Německo	Medium capacity
Technologie materiálů Sandvik	Švédsko	Large production systems

Reputable manufacturers have decades of experience in designing customized systems for different alloy groups and powder requirements. They also offer auxiliary equipment like sieves, mills, metallographic testers.

Price Range of Standard Metal Atomization Equipment Models

Kapacita	Cenové rozpětí
Lab scale (1-5 kg/hr)	$100,000 to $250,000
Pilot scale (10-50 kg/hr)	$500,000 to $1.5 million
Production scale (200+ kg/hr)	$2 million to $5 million

Larger production capacities with multiple atomization streams, bigger melting/heating units, high-end controls and powder handling systems are costlier. Location and site-specific requirements also impact pricing.

How to Choose a Metal Atomization Equipment Supplier

Important factors to consider when selecting a metal atomization equipment supplier:

Selection Criteria for Metal Atomization Equipment Supplier

Parametr	Podrobnosti
Zažít	Years in business, number of installations delivered
Schopnosti	Staff expertise, technology portfolio, R&D facilities
Flexibilita	Customization to meet product requirements
Dodržování norem	Certifications like ISO, industry standards
After-sales service	Installation support, training, maintenance contracts
Náklady	Pricing models, total cost of ownership
Dodávka	Lead time, shipping, site readiness
Umístění	Geographic proximity for support

Look for an established player with proven expertise across different metals, scale, and powder specifications. Ensure they offer flexible solutions tailored to your needs. Review maintenance costs, spare parts availability, warranties before purchase.

Installing a Metal Atomization System

Metal atomization equipment requires careful site planning and installation. Below are some key guidelines:

Metal Atomization Equipment Installation Checklist

Aktivita	Podrobnosti
Site planning	Ensure adequate space, utilities, secondary containment
Civil works	Concrete foundation, walls, drainage works
Montáž	Assemble sub-systems as per drawings
Komunální služby	Electrical, process water, inert gas lines
Ventilace	Fume extraction, HEPA filtration
Uvedení do provozu	Dry & wet testing, trial powder runs
Bezpečnost	Integrate safety interlocks, alarms
Dokumentace	Operating manuals, P&ID drawings, inspection reports
Operator training	Classroom and hands-on training

Proper utilities, safety systems, containment structures and operator training help ensure smooth starting up and safe operation. Vendors provide technical support during installation and commissioning.

How to Operate a Metal Atomization System

Consistent quality powder depends on stable operation following standard procedures:

Metal Atomization Equipment Operation Guidelines

Aktivita	Pokyny
Startup	Energize utilities, run purging cycles, preheat nozzles
Tání	Charge feedstock, allow adequate melt soak time
Atomizace	Open gas/water valves to rated pressure
Monitorování	Observe nozzle spray pattern, adjust parameters
Shutdown	Stop atomization, allow melt to solidify before draining
Manipulace s práškem	Handle hot powder carefully, avoid air ingress
Údržba	Inspect consumable parts, maintain spares inventory
Bezpečnost	Ensure interlocks, ventilation are working
Kontroly kvality	Take samples for size analysis, morphology, chemistry

Continuous monitoring of process variables like temperature, pressure, water/gas flow is required. Maintenance schedules and standard operation procedures need to be strictly followed.

Maintenance Requirements for Metal Atomization Equipment

Routine maintenance is vital for maximizing equipment life and performance.

Maintenance Checklist for Metal Atomization Equipment

Sub-system	Činnosti údržby	Frekvence
Tavicí jednotka	Inspect induction coils, charge materials, insulation	Měsíční
Trysky	Inspect orifice condition, replace nozzles	500 cycles
Atomizační komora	Inspect refractory condition	6 měsíců
Gas lines	Check for leaks, flow calibration	3 months
Water lines	Inspect seals, valves, pumps	Měsíční
Ovládací prvky	Calibrate sensors, test interlocks	3 months
Fume extraction	Check filters, ducts	Týdenní
Manipulace s práškem	Inspect bins, seals, gaskets	Týdenní

Critical consumable spares like induction coils, nozzles, gaskets require inventory planning to avoid downtime. Annual maintenance contracts with vendors are advisable.

Advantages and Limitations of Metal Atomization

Advantages and Limitations of Metal Atomization Process

Výhody	Omezení
Precise control over particle size and morphology	Higher capital and operating costs
Custom alloys and microstructures possible	Limited productivity for smaller units
Minimal melt superheat required	Reactive alloys require inert gas
Lower oxidation compared to gas atomization	Irregular powder shape with water atomization
Suitable for reactive alloys using inert gas	Requires auxiliary powder handling equipment
Near net shaped parts from powders	Safety hazards of fine pyrophoric powders require precautions

The process is best suited for small batches of specialized powders despite higher costs. Safety procedures for handling reactive fine metal powders are essential. Larger production models offer better economies of scale for high volume applications.

FAQ

Q: What is the difference between gas atomization and water atomization?

A: Gas atomization uses inert gases at lower pressures to produce finer and more spherical powder particles compared to water atomization which uses water at ultra-high pressures for higher throughputs but irregular powder shapes.

Q: What particle size can be achieved with metal atomization?

A: Particle sizes ranging from around 10 microns to 250 microns can be produced depending on the method and operating parameters. Gas atomization can produce finer powders in the 10-100 micron range.

Q: What metals can be atomized into powders?

A: Most alloy systems including steels, aluminum, titanium, nickel, cobalt, copper alloys can be atomized. Refractory metals with very high melting points are difficult to atomize.

Q: How much does a metal atomization equipment system cost?

A: Costs range from around $100,000 for lab units up to several million dollars for large industrial systems, depending on capacity, automation, and customization requirements.

Q: What safety precautions are required for metal atomization?

A: Key requirements include ventilated enclosures, inert gas purging cycles, safety interlocks, adequate containment systems for fine pyrophoric metal powders, and personnel protective equipment.

Q: What determines the particle size distribution of atomized powder?

A: Particle size is influenced by factors like melt flow rate, atomizing gas/water pressure, nozzle design, melt temperature and cooling rate. Optimizing these parameters is key for desired size distribution.

Q: What are the major applications of metal atomization powder?

A: Key applications are metal injection molding, additive manufacturing including 3D printing, thermal spray coatings, powder metallurgy pressing and sintering, aerospace components, biomedical implants.

Q: How often is maintenance required for metal atomization equipment?

A: Routine preventive maintenance is recommended every few months on sub-systems like gas lines, water lines, nozzles, induction coils, and safety interlocks to maximize performance. Consumables may need replacement every few hundred cycles depending on usage.

Závěr

Metal atomization converts alloys into fine spherical or irregular powders with unique properties tailored to demanding applications across industries. Gas atomization allows finer control over particle size and shape compared to higher volume water atomization.

Careful designing of sub-systems for material handling, melting, atomization and powder collection is required for optimal performance. Reputable vendors provide customizable equipment ranging from small R&D systems to large industrial capacities.

Proper installation, safety features, operator training and routine maintenance are essential to maximize production, efficiency and safety when operating metal atomization units. The atomized metal powders enable manufacturing of high performance components otherwise difficult to produce via conventional metallurgy routes.

znát více procesů 3D tisku