Container Carbide Blanks

Container carbide blanks refer to containers or canisters filled with carbide material to be used for making cutting tools and wear-resistant parts. This article provides a detailed overview of container carbide blanks, their key properties, manufacturing process, applications, suppliers, costs and other aspects to consider when selecting and using them.

Overview of Container Carbide Blanks

Container carbide blanks provide an efficient way to transport and utilize carbide for tool making applications. Here are the key details about these blanks:

  • Container carbide blanks consist of a metal canister or container filled with compacted carbide powder material.
  • The carbide material is most commonly tungsten carbide or titanium carbide powders.
  • The container is usually made of mild steel, stainless steel or nickel.
  • Blanks come in different standard sizes based on container diameter and length.
  • Typical sizes range from 3mm to 150mm diameter and 10mm to 300mm length.
  • Blanks are supplied based on the carbide grade, grain size, binder percentage, and container dimensions.
  • They are used as molded perform blanks to make cutting tools, wear parts and components using machining and pressing operations.
  • Blanks provide even distribution of consistent quality carbideIdeal for complex tool geometries.
  • Main advantages are ease of transportation, storage and handling.

Types of Container Carbide Blanks

There are two main types of container carbide blanks:

Blank TypeDescription
Straight BlanksCylindrical blanks with constant diameter and carbide fill
Tapered BlanksBlanks tapered on one or both ends to fit holder cone

Key Properties of Carbide Blanks

The key properties of container carbide blanks that determine applications and performance:

PropertyDescription
Carbide gradeChemical composition of tungsten or titanium carbide
Carbide grain sizeMeasured in microns based on microscopic structure
Binder percentageAmount of metallic binder like cobalt in the carbide
HardnessResistance to deforming, cutting or wearing
Transverse Rupture Strength (TRS)Ability to withstand breakage forces
ToughnessResistance to chipping during machining
Wear resistanceResistance to abrasion and adhesive wear
Chemical resistanceResistance to acids, alkalis and other chemicals
container carbide blanks

Manufacturing Process for Carbide Blanks

Carbide blanks are made using the following key manufacturing steps:

  • Milling and blending – The tungsten or titanium powders and binder alloy powders are measured, milled and blended to achieve the desired composition.
  • Compaction – The powder mixture is compacted into a cohesive preform using cold or hot isostatic pressing.
  • Sintering – The pressed compact is sintered at 1300-1700°C in a controlled atmosphere to form dense carbide.
  • Crushing and milling – The sintered mass is crushed and milled into fine powder of specific particle sizes.
  • Loading – The carbide powder is loaded and compacted into steel containers under vibration.
  • Sealing – The loaded containers are sealed using covers which are welded to enclose the carbide.
  • Quality checks – The blanks undergo finishing operations and stringent quality checks before shipment.

Applications and Uses of Container Carbide Blanks

Here are the main applications and uses of container carbide blanks:

Cutting Tools

  • Turning inserts
  • Milling cutters
  • Drills and reamers
  • Threading tools
  • Form tools
  • Burrs and routers

Wear Parts

  • Extrusion dies
  • Drawing dies
  • Pelletizing tools
  • Wear plates
  • Seals and bearings

Components

  • Extruder screws
  • Valve parts
  • Nozzles
  • Pump shafts
  • Rollers

Carbide blanks enable machining of complex tool and component geometries needed for critical applications.

Guide to Selecting Container Carbide Blanks

Proper selection of the carbide blank is key to getting optimal performance. Use this guide when choosing blanks:

ParameterDetails to Consider
Carbide gradeHardness, wear resistance and toughness needs
Grain sizeFiner for sharp edges, coarser for toughness
Binder percentageHigher for toughness, lower for hardness and wear resistance
Blank dimensionsDiameter, length, straight or tapered based on final part dimensions
ToleranceTighter tolerances for precision parts, looser for roughing
Surface finishSmoother finish required for fine finishing operations
CertificationsISO certified for consistent quality

Consult manufacturer to select optimal blank specifications for your specific application.

Suppliers and Costs of Carbide Blanks

There are many global suppliers that manufacture and sell carbide blanks. Here are typical price ranges:

Carbide TypeCarbide GradeCost per kg
Tungsten CarbideSimple grades$18-$35
Complex grades$50-$150
Titanium CarbideCommon grades$25-$60
Specialty grades$70-$250

Larger size blanks, finer grain size, higher purity and complex grades are more expensive. Customized blank dimensions and properties are also costlier.

Top global suppliers include:

  • Sandvik
  • Kennametal
  • Mitsubishi Materials
  • GTSM Sintermetall
  • Hyperion Materials & Technologies
  • Zhuzhou Jade New Materials

Installation, Storage and Handling of Blanks

Follow these guidelines for using carbide blanks:

  • Handle carefully to avoid shocks which can cause cracks.
  • Use cushioned containers and secure packaging for transportation.
  • Store in a cool, dry place and avoid temperature extremes.
  • Use proper fixtures and clamping when machining to prevent damage.
  • Follow recommended machining parameters like speeds, feeds and tooling.
  • Use appropriate safety precautions when handling fine carbide powder.

How to Select a Reliable Carbide Blanks Supplier

Follow these tips for choosing a good carbide blanks supplier:

  • Look for ISO 9001 certified manufacturers with strict quality control.
  • Prefer suppliers with a wide range of carbide grades, grain sizes and binders.
  • Check capabilities for custom blank dimensions and tolerances.
  • Ensure they have expertise in recommending the optimal blanks.
  • Ask for technical data sheets and test certificates for their products.
  • Evaluate their post-sales service and technical support.
  • Compare pricing but give higher priority to quality and consistency.
  • Check lead times and availability of ready stock for faster delivery.
  • Ensure capabilities to meet large volume or bulk orders if needed.
  • Give preference to manufacturers over resellers for quality assurance.

Pros and Cons of Container Carbide Blanks

AdvantagesLimitations
Consistent quality carbideHigher upfront costs than loose powder
No blending neededLimited to standard blank sizes
Uniform hardness and propertiesRequires decompaction and crushing after use
Reduced carbide waste during processingReusing crushed powder can cause contamination
Better control over compositionLimitation on maximum blank size
Easier handling than loose powderRestricted to simpler blank geometries
Avoid inhalation of fine powderSurface defects possible due to container
Low porosityMay still require blending with other powders
Reduced pressing cycle timesContainer separation can be challenging

FAQs

Q: What are the differences between iron-rich carbide grades versus nickel-rich grades?

A: Iron-rich carbide grades like C1-C6 have higher hardness and wear resistance but lower toughness. Nickel-rich grades like C9-C11 have improved toughness but slightly lower hot hardness and chemical resistance.

Q: How are custom blank dimensions possible?

A: Suppliers can provide custom blank diameters and lengths within certain size limits based on their container inventories. Special tapered, hollow or layered blanks can also be engineered.

Q: What are recommended machining parameters for carbide blanks?

A: Lower surface speeds of 100-250 m/min, higher feed rates of 0.2-0.4 mm/rev and rigid clamping are recommended. Use coated carbide tools with appropriate edge preparations.

Q: How to decide between pressed blanks versus sintered blanks?

A: Pressed blanks are less expensive but have lower density and strength. Sintered blanks offer the highest quality but are costlier. Medium density hot pressed blanks provide a good compromise.

Q: Why are higher purity grades and fine grain sizes more expensive?

A: Achieving higher carbide purity and finer grain size requires additional processing steps and advanced techniques, hence the higher cost.

Q: What are typical applications of cobalt versus nickel binding agents?

A: Cobalt binders provide excellent wear resistance suited for cutting tools and dies. Nickel binders provide improved corrosion resistance preferred for extruder parts, valves and pump components.

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