Basic Info.

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Model NO.

ASTM430

Refractoriness (&#;)

-

Feature

Instant Materials

Type

Refractory Material

Shape

Crescent

Material

Metalwork

Melting PointºC

-

Spring Module at 876ºC 104MPa

8.27

MPa Tensile Strength at 870ºC

48

Heat-Shrinking Coefficient at 870º

13.68

Heat-Conductibility at 500ºC W/M.K

26.3

Proportion at Room Temp., g/cm3

7.8

Weight Loss After Circular Oxidation Abo

70

Erosion in The H2s,Mil/Yr

200

Max Working Temp. in The So2 ,ºC

800

Erosion in The Natural Gas at 815º

12

Erosion in The Coal Gas From The Cookery

236

Nitrification in The Anhydrous Ammonia a

80-175

Erosion in The H2,at 454ºC,Mil/Yr

21.9

Carbon Content of The Alloy After Solid

1.03

Trademark

xuanhua

Transport Package

Moisture-Proof Carton or Paper Bag

Specification

0.3*1*25mm

Origin

Zhengzhou, China

Product Description

ASTM 430 Melt Extracted Steel Fiber for Refractory Material Melt Extract needles

1.Specification

Place of Origin: zhengzhou,China

Model Number:304,310,330,430,446

Standard:ASTM/AISI/ISO/CE

Length:19mm/25mm/35mm or customized

Material:Stainless Steel

Melting Point:Greater than C

Brand Name:XuanHua

Feature:high temperature resistance, corrosion resistance, oxidation resistance, tensile resistance, wear resistance, increased strength, heat shock resistance

Types:Melt Extracted

Diameter:0.3mm-0.5mm

Application:Refractory Industry

Supply Ability:300 Ton/Tons per Month

Packaging Details:PACKED BY CARTON BOXES WITH PALLET, 20KGS/CARTON, 50 CARTONS/PALLET ( NET WEIGHT KG ON A PALLET).13pallets in 20'

Port: Tianjin Port or Qingdao

Shape:needle/pipe/Crescent Shape

 

SIZE

 

C

P

Mn

Si

Cr

Ni

AISI

330

&#;0.30

&#;0.04

&#;2.00

&#;0.75

17~20

33~37

AISI

310

*

&#;0.30

&#;0.04

&#;2.00

&#;1.50

24~26

19~22

AISI316

&#;0.30

&#;0.04

&#;2.00

&#;1.00

16~18

10~14

AISI314

&#;0.30

&#;0.045

&#;2.00

1.5-3.0

23~26

19~22

AISI

309

&#;0.30

&#;0.04

&#;2.00

&#;1.00

22~24

12~15

AISI

304

*

&#;0.30

&#;0.04

&#;2.00

&#;2.00

18~20

If you want to learn more, please visit our website Melt Extracted Stainless Steel Fiber.

8~10

AISI301

&#;0.30

&#;0.04

&#;2.00

&#;2.00

16~18

6~8

AISI201

&#;0.30

&#;0.06

5.5~7.5

&#;1.00

16~18

3.5~5.5

AISI

446

*

&#;0.30

&#;0.04

&#;1.50

&#;2.00

23~27

 

AISI

430

*

&#;0.30

&#;0.03

&#;1.00

&#;2.00

16~18

 

2.Application

1. Metallurgical industry

The refining outside the furnace airbrush, dipping tubes, slag dam, bag lining cover, the triangle electric furnace, furnace cover, the molten iron trench cover,

a

luminum melting furnace

,

the torpedo cans, coke oven door, the heating furnace of steel rolling door, furnace roof, burn

top

, annular furnace baffle wall, hearth roll, forging steel furnace, steel tanks etc, items can be used for various refractory kiln linings.

2. Cement industry

Cement rotary kiln exit,cooler,coal burner,kiln calciner,preheater and other parts

3. Kiln

Sintering furnace, reduction furnace, finer, the flue, furnace burning

top

 and other heat-resistant linings.

4. Petroleum chemical industry

Especially in the refining the lining of catalytic cracking units.

5. Electric power industry

Thermal power plant boiler heat resistant linings.

6. Environmental protection industry

Incinerator.

7. Machinery Industry

Vibrating furnace bottom, various heating furnaces.

3.Package

Carton:
20kg/carton,50 boxes/pallet,1pallet net weight kg.
Carton size:250*250*250mm

Paper Bag:
20kg/bag,50 bags/pallet,1pallet net weight kg.

4.Production Process

Melt-extracted steel fibers is derived from stainless steel ingots as primary raw material. This process employs electric furnaces to liquify the ingots into a steel material of approximately -ºC. Proceeding past the melting stage, the liquid steel is exposed to a grooved, high-velocity, rotating, melt-extracting wheel mechanism designed to manufacture steel fibers in accordance to our clients' precise specifications. Upon reaching an ideal liquid state, the wheel mechanism instigates the steel liquid to eject through the slot, propelled by extreme centrifugal force and instantaneous cooling, thereby facilitating the molding process. Cooling efficiency is sustained by the water-infused wheel. This technique is employed to yield steel fibers of variant materials and dimensions.

5.Enterprise Photoes

6.Q&A

Q1: Are you a trading company or a manufacturer?

We are a manufacturer. Since , we are specialized in steel fiber manufacturing and R&D. We are located in Zhengzhou, Henan Province, with  M 2 production base. With multiple types of steel fiber production equipment, our production speed is 10 tons per day. Our products are widely praised in China and strictly comply with international standards. We have in-depth cooperation with Shanghai Jingpu Technology Co., LTD., and the quality of our products is guaranteed. These fibers comply with YB/TlSl- standards. The products are mainly used in high temperature industrial kilns and concrete construction industry.

Q2: Do you accept customized products?

Yes, we provide customized services to our customers, from product types, specifications, quality requirements, packing forms and modes of transportation to meet their different needs.

Q3: What about the shipment?

We will choose the right mode of transportation according to customer's requirement. Usually by sea or by rail.

Q4: Is a trial order acceptable?

Yes, the lower minimum order quantity is always accepted for quality and market assessment

Q5: What are the terms of payment?

30% in advance, name of port or unloading address, 70% payment.

Q6: How do you ensure the quality of your products?

Each batch of products will be instrumented and a product test sheet will be attached. If customers need, samples can be randomly selected by the third party testing company to issue testing certificate, to ensure the quality of goods.

Q7: When can you receive the goods after submitting the order?

Sample orders: 1-3 days; Mass production: 15-20 working days.

 

Overview

slm, which stands for selective laser melting, is an additive manufacturing process that uses a laser to selectively melt and fuse metallic powder material layer by layer to build a 3D part. It is one of the most commonly used metal 3D printing technologies today.

Some key things to know about slm equipment:

• Works with various metals including stainless steels, titanium, aluminum, nickel alloys, and more
• Uses a high power laser to selectively melt metal powder particles in a powder bed
• Builds parts layer-by-layer by spreading thin layers of powder and scanning the laser to melt the cross-section
• Produces fully dense metal parts with mechanical properties comparable to traditional manufacturing
• Enables complex geometries not possible with conventional subtractive methods
• Well-suited for small batch production, customized parts, and rapid prototyping
• slm machines consist of a laser, scanner system, powder bed, recoater mechanism and more

This guide provides a comprehensive overview of slm equipment covering the working, types, applications, specifications, suppliers, installation, operation, maintenance, and more. Let&#;s explore the world of selective laser melting equipment!

slm Equipment Types

There are several categories and types of slm equipment available from various manufacturers. Here is a comparison:

Equipment TypeBuild SizeLaser TypeKey CharacteristicsDesktop slm50-150 mmFiber, CO2Compact size, lower cost, R&D, small partsBenchtop slm150-300 mmFiber, CO2Larger build volume, moderate costIndustrial slm300-500 mmFiber, CO2High capacity, automated productionLarge-format slm500+ mmFiberFor large parts, high productivity

The main factors that differentiate slm machine types include:

• Build volume &#; Maximum part size that can be printed. Ranges from a few cm for desktop to >1 m for large systems.
• Laser type &#; Fiber lasers allow faster processing. CO2 lasers are lower cost.
• Automation &#; Industrial systems have higher levels of automation and control.
• Inert gas use &#; Larger machines more often use inert argon gas vs. smaller using air.
• Price &#; Desktop and benchtop models are lower cost with reduced capacity.

So in summary, desktop and benchtop slm equipment is well-suited for prototyping and R&D purposes while industrial and large-format systems are designed for volume production applications. Consider build size, price, quality needs and other requirements when selecting an slm machine type.

PREPed Metal Powders

slm Equipment Components

slm machines consist of several main sub-systems and components that work together to enable the additive manufacturing process. Here are the key components:

ComponentDescriptionLaserProvides focused heat energy to selectively melt the powder materialScanning systemControls and positions the laser beam preciselyPowder bedHolds and spreads the metal powder layersRecoaterSpreads and levels fresh powder over the build areaPowder deliveryFeeds new powder from cartridge/containerBuild plateHolds the printed part as layers accumulateInert gas flowProtective atmosphere of argon or nitrogen gasComputerControls hardware, executes build fileChillerCools laser and sensitive opticsFiltersCapture excess powder and particles

The laser is one of the most critical components. slm machines typically use either a fiber laser (ytterbium-doped) or CO2 laser with power levels from 100 to watts. The laser scanning system directs the laser beam across the powder bed surface and scans the cross-section of each layer.

Other key hardware includes the powder bed which holds the raw material powder, recoater to spread new layers of powder, inert gas flow system, various sensors, and more. The integrated control software converts CAD data into instructions for the equipment to follow layer-by-layer.

slm Equipment Specifications

slm machines can be compared by various technical specifications and performance parameters. Here are some key specifications to consider for slm systems:

SpecificationTypical RangeBuild volume50mm &#; 500mm edge lengthLayer thickness20-100 micronsLaser power100-WScanning speedUp to 10 m/sBeam size50-100 micronsPowder materialStainless steel, titanium, Ni alloys, Al alloys, moreSupported materialsMost weldable alloysPrecision± 0.1-0.2% dimensional accuracySurface finishUp to 15 microns roughness

Other factors like the inert gas consumable usage, filtering system effectiveness, software capabilities, and more also differentiate slm equipment models and performance. In general, industrial systems offer larger build volumes, higher laser power, faster scanning speeds, and better process control compared to desktop models.

slm Equipment Design Considerations

slm machines involve precision design and engineering across optical, mechanical, electronic, and software systems. Some key design factors include:

• Laser optics &#; Well-configured galvo/mirror system for accurate laser steering and spot sizing.
• Powder handling &#; Minimizing jamming and ensure smooth powder flow.
• Gas flow &#; Managing laminar flow across powder bed.
• Build plate &#; Withstanding repeated high temperatures.
• Controls &#; Precisely monitoring and adjusting parameters in real-time.
• Filters &#; Capturing micron-scale metallic particles and powder.
• Contamination prevention &#; Keeping sensitive optics clean.
• Calibration &#; Maintaining alignment and calibration during operation.
• Automation-readiness &#; Allowing integration of material handling systems.

Careful slm equipment design is needed to achieve repeatable, high-quality builds in a production environment. Leading manufacturers continue to refine the hardware and software for better process control.

slm Equipment Suppliers

There is a range of companies that manufacture and provide slm equipment solutions. Here are some of the major suppliers:

SupplierEquipment Brands/ModelsEOSEOS M series, EOS P seriesSLM SolutionsSLM®125, SLM®280, SLM®500, SLM®800GE AdditiveConcept Laser M2, MLine, XLine 500R3D SystemsProX® DMP 100, 200, 300, 320TrumpfTruPrint , , RenishawRenAM 500Q, RenAM 500MSismaSisma Mysint100, Mysint300

In addition, there are a growing number of suppliers from Asia that offer more affordable desktop slm equipment including:

• Farsoon
• Longer 3D
• Raycham
• Wiiboox
• Creality

When selecting an slm equipment supplier, key considerations include build quality, reliability, service, customer support, powder handling features, software capabilities, pricing, and prior user experiences. Leading original equipment manufacturers tend to offer proven technology and performance.

Complete Guide to slm Equipment 4

slm Equipment Pricing

The cost of slm equipment can range quite widely depending on the build volume, features, and manufacturer. Here is an overview of typical pricing ranges:

slm Equipment TypeApproximate Cost RangeDesktop slm$50,000 &#; $150,000Benchtop slm$150,000 &#; $300,000Industrial slm$300,000 &#; $1,000,000Large-format slm$1,000,000+

In general, industrial slm systems from original equipment manufacturers cost between $300,000 to $1,000,000. Larger build envelopes, higher powered lasers, and greater automation increase the price.

Affordable desktop models from Asian suppliers are available under $100,000. Many offer similar capabilities to higher priced equipment but may lack in reliability, performance, or service.

Total costs also include ongoing operating costs for metal powders, filters, gas supplies, maintenance, repairs, and spare parts which can be substantial. Both equipment purchase costs and operating costs should be considered.

slm Equipment Installation

Proper installation of slm equipment helps ensure safe and optimal operation. Here are key installation steps:

• Unpack machine components carefully and check for damage.
• Position on sturdy frame or table to minimize vibration.
• Level build platform precisely.
• Connect chiller, gas supplies, ventilation ducting.
• Install fume extraction unit/filter.
• Connect electrical power supply.
• Install and calibrate all optics and laser path.
• Test motion of recoater, powder system.
• Integrate monitoring sensors.
• Establish closed-loop powder handling system.
• Initialize and calibrate machine settings.
• Perform sample test builds and validate quality.

Adequate facility preparation is also required including space, power supply, stable temperature/humidity, ventilation, hazardous material handling capabilities, and more. Installation is typically completed by the equipment manufacturer representatives.

slm Equipment Operation

Operating an slm machine requires careful supervision, system monitoring, standard protocols, and build validation. Here are key operating procedures:

• Import and prepare 3D CAD model into slicer software.
• Select process parameters and generate build files.
• Sieve and load metal powder into system.
• Select and mount build plate.
• Adjust layer thickness, laser power, speed, etc.
• Initiate inert gas flow and preheat powder bed.
• Initiate first layer powder spreading and laser scanning.
• Periodically monitor temperature, powder levels, gas flow.
• Allow layers to complete until full build height is reached.
• Remove build plate when finished and recover part.
• Remove excess powder using blasting techniques.
• Post-process part as needed &#; annealing, machining, etc.

Critical process parameters that are controlled include laser power, scanning pattern, scanning speed, hatch spacing, layer thickness, preheat temperature and others. Real-time monitoring and adjustment is often required.

Safety equipment for respiratory and eye protection along with hazardous power training is mandatory. Parts also undergo validation testing to verify required material properties.

slm Equipment Maintenance

Routine preventative maintenance helps maximize uptime and performance. Maintenance tasks include:

• Cleaning &#; Keep optics, laser path and sensors clear of dirt and debris.
• Calibration &#; Realign and calibrate sensors, lasers, optics.
• Filter change &#; Replace air and powder filters regularly.
• Recoater &#; Lubricate/replace recoater blades, adjust gap.
• Laser &#; Monitor beam quality and adjust resonator alignment.
• Motion &#; Lubricate linear stages, replace worn components.
• Powder &#; Dispose excess powder regularly to avoid clumping/caking.
• Safety checks &#; Confirm status of gas detectors, alarms, sensors.
• Firmware &#; Install software and firmware updates from vendor.

Manufacturers provide maintenance manuals detailing schedules for daily, weekly, monthly recommended maintenance. Consumable parts like filters and recoater blades require routine change outs. Maintenance contracts can provide regular preventative service.

Applications of slm Equipment

slm technology is well-suited for various applications across different industries. Here are some typical applications:

Aerospace &#; Turbine blades, structural brackets, rocket nozzles

Medical &#; Orthopedic implants, prosthetics, surgical instruments

Automotive &#; Lightweighting parts, custom tooling

Industrial &#; Heat exchangers, fluid handling parts

Defense &#; Components for firearms, armor

Jewelry &#; Customized precious metal jewelry

Key advantages of slm for these applications include consolidating assemblies into one part, weight reduction, complex cooling channels, freeform shapes, rapid turnaround, and more.

The high precision, small feature size, and excellent mechanical properties of slm make it ideal for fabricating lightweight, optimized and custom components across sectors.

How to Select an slm Equipment Supplier

Selecting the right slm equipment and supplier is an important decision. Here are key considerations when choosing an slm supplier:

• Build quality &#; Evaluate sample parts to ensure good density, properties, accuracy.
• Reliability &#; Seek field data on meantime between failures and longevity.
• Technical support &#; Assess response time and support infrastructure.
• Warranty &#; Review warranty terms on hardware, optics, etc.
• Training &#; Check availability of operation and maintenance training.
• Materials range &#; Consider available powder materials and quality.
• Software &#; Examine built-in software capabilities and ease of use.
• Regional presence &#; Determine availability of local application engineers.
• Service contracts &#; Compare post-sale maintenance contracts and SLAs.
• Pricing &#; Balance purchase cost, TCO and performance value.

Narrow down the shortlist based on build specifications, price range, and risk tolerance. Schedule equipment demos and evaluate sample part quality firsthand from potential suppliers before final purchase decision.

slm vs Other Metal 3D Printing Processes

slm is one of several metal additive manufacturing technologies each with their own profiles. Here is how slm compares:

ProcessProsConsSelective Laser Melting (slm)Excellent properties, high precision, most alloysLower speed, higher cost, residual stressesDirect Metal Laser Sintering (DMLS)Good material properties, low costsPorosity issues in some alloysElectron Beam Melting (EBM)Excellent structural properties, near full densityLess alloys supported, moderate precisionDirected Energy Deposition (DED)Large parts, metal deposition, repairsLower resolution, higher cost

Key Differences:

• slm produces fully dense, void-free structures in a wider range of alloys but at lower build speeds.
• DMLS powder is sintered vs. fully melted, limiting material performance.
• EBM requires a vacuum, supports fewer alloys but delivers excellent material properties.
• DED has lower precision but supports large metal deposition applications.

For most high-value production components, slm provides superior material properties. But for large repairs or simpler shapes, DED or DMLS can be more cost-effective.

Complete Guide to slm Equipment 5

Advantages and Limitations of slm

Like any technology, slm has both advantages and limitations to consider:

Advantages

• High dimensional accuracy and fine surface finish
• Excellent mechanical properties maintained throughout builds
• Complex geometries and lightweight structures possible
• Consolidated parts and assemblies
• Rapid turnaround for design iterations
• Customized shapes, features, and designs

Limitations

• Small build envelopes restrict part sizes
• Relatively slow production rates
• Supports limited materials &#; mostly metals
• Significant post-processing often required
• Residual stresses can cause deformation
• High equipment and material costs

Understand application requirements and compare process tradeoffs to determine if slm is the most suitable AM process. slm provides a versatile tool for metal part production but requires experience to optimize applications.

FAQ

Here are answers to some frequently asked questions about slm equipment:

Q: What metals can be processed using slm?

A: Most weldable alloys including stainless steel, titanium, nickel alloys, aluminum, tool steel, and more. New materials are continually validated.

Q: What are typical layer resolutions for slm machines?

A: Layer thicknesses range from 20 to 100 microns, with 50 microns being common. Finer layers improve surface finish but also increase build time.

Q: How large of a part can be made with slm?

A: Desktop systems support builds up to 100-150mm size while industrial slm machines allow 500mm build envelopes or larger.

Q: What processes are required after slm printing?

A: Post-processing steps include support removal, media blasting, annealing, machining, polishing, and applying surface treatments.

Q: What types of accuracy and surface finishes are achieved?

A: Dimensional accuracy reaches ±0.1-0.2% with surface finishes around 15 microns roughness, depending on parameters.

Q: What safety precautions are required for operation?

A: Proper PPE including respirators, protective eyewear, gloves, and hazardous material handling training. Proper ventilation and safe powder handling are critical.

Q: What maintenance is required for slm machines?

A: Regular maintenance includes optics/laser cleaning, filter changes, powder disposal, lubrication, calibrations, firmware upgrades, and more.

Q: How long does it take to set up a build job on an slm machine?

A: With prepared CAD models, orienting parts, setting parameters and slice times, starting a build can range from 30 minutes to a few hours.

Conclusion

slm provides transformative capabilities for dense, high-performance metal part production. Understanding the different equipment types, working principles, specifications, applications, and advantages allows the technology to be leveraged effectively. With continual advances in machines, materials, software, and process control, slm promises to become even more competitive against conventional manufacturing.

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