Precision Ground Plates, Rods & Tooling Inserts
Explore our hot-selling standardized blanks and engineered wear components, precision-sintered for heavy stamping, downhole tooling, and aggressive metal cutting.
Overcoming Core Porosity in Thick Carbide Plates (>20 mm to 120 mm)
In heavy industrial stamping dies, crushing rollers, and hot scarfing wear surfaces, standard vacuum sintering fails to guarantee uniform cross-sectional density. Thick tungsten carbide plates undergo distinct thermodynamic gradients during consolidation that require overpressure Sinter-HIP processing.
Elimination of Core Porosity
As section thickness exceeds 20 mm, conventional vacuum sintering often leads to micro-shrinkage and cobalt pooling at the center of the block. By applying 10 MPa (100 bar) argon overpressure during the liquid-phase sintering plateau (1380°C–1440°C), our Sinter-HIP furnaces collapse micro-voids, achieving ISO 4499 porosity ratings of A00-B00 across the entire cross-section.
Grain Growth & Eta Phase Control
Thick masses retain heat longer during cooling, risking secondary recrystallization and abnormal grain growth that drastically degrades transverse rupture strength (TRS). We utilize proprietary micro-alloyed grain growth inhibitors (VC, Cr3C2, TaC) and compute precise cooling schedules to maintain an ultra-tight grain distribution without brittle eta phase (Co3W3C) formation.
Stress-Relieved for Precision EDM
Wire electrical discharge machining (WEDM) of thick carbide blocks triggers extreme thermal gradients that induce micro-cracking if residual stresses exist. Every thick plate produced by Jiangxi Zhongfu undergoes multi-stage sub-zero cryogenic stabilization and vacuum annealing to ensure zero geometric distortion and crack propagation during deep cavity wire cutting.
Engineering Grade Selector: Chemical & Mechanical Properties
Thick tungsten carbide plates demand an optimized balance between fracture toughness (K1C) to absorb cyclical mechanical shock and Rockwell hardness (HRA) to resist abrasive micro-cutting.
| Carbide Grade | Binder Phase (wt%) | Grain Size (µm) | Density (g/cm³) | Hardness (HRA) | TRS (MPa) | Primary Industrial Applications |
|---|---|---|---|---|---|---|
| ZF-YG6 | 6.0% Co | 1.0 – 1.4 (Medium) | 14.90 – 15.00 | 90.5 – 91.5 | ≥ 2,200 | Abrasive wear plates, guide strips, precision drawing dies, non-ferrous trim knives. |
| ZF-YG8 | 8.0% Co | 1.4 – 2.0 (Medium-Coarse) | 14.70 – 14.85 | 89.5 – 90.5 | ≥ 2,600 | Crusher chute liners, mining drill plates, heavy brazed tips, brick manufacturing molds. |
| ZF-YG15 | 15.0% Co | 1.6 – 2.4 (Coarse) | 13.90 – 14.15 | 87.0 – 88.0 | ≥ 3,100 | Heavy stamping punches, cold heading dies, hydraulic press wear pads, rotary shear blades. |
| ZF-YG20 | 20.0% Co | 2.2 – 3.2 (Extra-Coarse) | 13.40 – 13.65 | 85.0 – 86.5 | ≥ 3,400 | Severe impact progressive dies, deep drawing tools, thick plate EDM blocks, scrap shearing. |
| ZF-Ni10 | 10.0% Ni | 1.2 – 1.8 (Sub-Micron) | 14.45 – 14.65 | 88.5 – 89.5 | ≥ 2,500 | Non-magnetic tooling, downhole MWD/LWD sensor sleeves, chemical valve plates, battery dies. |
100% Virgin Raw Materials
Zero recycled scrap (zinc process or chemical re-claim) used in structural thick plates. Certified high-purity ammonium paratungstate (APT) ensures pure tungsten monocarbide grain structures without trace contamination.
Dimensional Capability
Thick flat plates up to 120 mm thickness, widths up to 400 mm, and lengths up to 800 mm. Near-net-shape green machining minimizes expensive diamond wheel grinding cycles for end buyers.
Ultrasonic NDT Inspection
100% ultrasonic non-destructive flaw detection (ASTM E114 / DIN EN 12668) applied to all thick blocks prior to dispatch, eliminating internal inclusions, density delaminations, and micro-fissures.
Surface Metrology
Supplied as as-sintered blanks (Ra 3.2–6.3 µm) or precision-ground via 4-axis CNC horizontal face grinders to mirror finishes down to Ra 0.05 µm (N3) with flatness tolerances within 0.005 mm/100 mm.
Mission-Critical Applications for Thick Cemented Carbide Slabs
Where tool steel and surface hardfacing fail under extreme pressure, impact, and corrosive wear, thick tungsten carbide plates deliver extended operating lifetimes and eliminate unplanned line shutdowns.
Automotive Stamping & Lamination Tooling
Progressive die sets stamping high-strength steels (DP, TRIP, and Martensitic grades) and electrical motor rotor/stator silicon steel laminations require extreme edge retention. Thick YG15 and YG20 plates provide the compressive yield strength (>4,500 MPa) to resist punch deflection and burr formation across millions of punch cycles.
Heavy Mining, Quarrying & Tunnel Boring (TBM)
Crushing chert, taconite, granite, and abrasive sandstone rapidly erodes conventional manganese steel wear liners. Thick wear plates in coarse-grain YG8 and customized carbide-matrix composite blocks shield crusher feed chutes, rotor impact plates, and scrap shear guides, multiplying service intervals by 8x to 15x.
Steel Continuous Casting & Scarfing
Continuous steel mill operations subject conditioning tools to violent thermal shock and mechanical friction. We manufacture thick scarfing back plates, guide shoes, and heavy indexing inserts (SPUB63, SPUB86, SNMX19) designed to cleanly peel oxidized outer scale from red-hot steel slabs at up to 1,000°C.
Downhole Oil & Gas Directional Drilling
Measurement-While-Drilling (MWD) and Logging-While-Drilling (LWD) pulse telemetry assemblies cannot tolerate ferromagnetic interference. Our proprietary nickel-bonded (ZF-Ni10) non-magnetic thick plates and radial sleeves deliver magnetic permeability ($\mu_r < 1.005$) with superior resistance to acidic mud abrasion and cavitation wear.
Lithium Battery Slurry & Cathode Mixing
Contamination of lithium-ion battery active materials with free iron or cobalt particles causes internal short circuits. Zhongfu supplies specialized thick WC-Ni and non-metallic ceramic-bonded wear blocks for continuous twin-screw kneaders, scraper discs, and micronizer grinding chambers to guarantee ultra-pure slurry outputs.
Rotary Can Tooling & Deep-Draw Formers
Two-piece beverage can manufacturing requires ironing dies and punch sleeves operating at 3,000 strokes per minute under boundary lubrication. Thick sub-micron carbide rings and square plates maintain sub-micron surface finishes, preventing galling and metal pick-up during deep aluminum drawing.
Vertical Integration: The Jiangxi Tungsten Corridor Advantage
Jiangxi Province represents the epicenter of global tungsten reserves and smelting infrastructure. Jiangxi Zhongfu Cemented Carbide Co., Ltd. capitalizes on this geographic proximity to ensure uncompromised metallurgical supply security, cost predictability, and rigorous quality consistency.
Raw Material Refinement
Direct sourcing of high-purity APT from local Jiangxi smelters. In-house ball milling with paraffin wax binders ensures pure stoichiometric WC powder with zero batch-to-batch chemical drift.
Automated Isostatic Pressing
High-tonnage multi-action CNC hydraulic and cold isostatic presses (CIP) compact large-volume powders up to 250 MPa, guaranteeing uniform green density across thick plates.
Vacuum Sinter-HIP
Computerized 10 MPa overpressure sintering with precise argon flushing profiles. Full thermal logging guarantees that every thick block achieves near-zero porosity and exact cobalt dispersion.
5-Axis CNC Precision Grinding
State-of-the-art creep-feed surface grinders and rotary table machines using resinoid and vitrified diamond wheels maintain surface flatness within 0.005 mm on meter-long plates.
Full Metallurgical Verification
Every lot is subjected to coercive force (Hc) testing, magnetic saturation (4πσ), Rockwell hardness (HRA), and metallographic scanning electron microscopy (SEM) prior to export approval.
Enterprise Sourcing: Total Cost of Ownership (TCO) Analysis
For senior procurement directors and tooling engineers, purchasing thick tungsten carbide plates is not an exercise in finding the lowest price per kilogram. True operational cost depends on wear performance, tool changeover downtime, and machining reliability.
Minimizing Scrap in EDM Wire Cutting
A thick carbide block that cracks during 40 hours of EDM cutting wastes not only the raw material but hundreds of dollars in EDM machine time, wire consumption, and operator wages. Our 100% Sinter-HIP, stress-relieved plates guarantee crack-free EDM discharge, protecting your machining investments.
Predictable Wear Kinetics
Premature chipping of stamping die inserts leads to catastrophic punch failure, unexpected tooling pull-downs, and unfulfilled Tier-1 automotive shipments. Zhongfu's strict grain size homogeneity prevents sudden brittle cleavage, delivering predictable, linear abrasive wear curves.
Inventory Cost Optimization
With blanket purchase order agreements, Kanban stocking programs, and guaranteed 3-to-4 week production cycles, our global clients reduce captive safety stock while maintaining continuous production lines across facilities in North America, Europe, and Asia-Pacific.
Global Quality Systems, Traceability & ESG Compliance
Overseas OEM tooling manufacturers require ironclad material compliance, conflict-free raw materials, and documented traceability from ore powder to finished grind.
EN 10204 3.1 Certification
Every shipment is accompanied by a certified Inspection Certificate detailing actual chemical assay (WC, Co, Ni, grain inhibitors), density, hardness (HRA), coercive force, and magnetic saturation.
Conflict-Free Mineral Policy
In accordance with OECD Due Diligence Guidance and the Responsible Minerals Initiative (RMI), our tungsten and cobalt feedstocks are audited conflict-free (CMRT compliant) from verified upstream smelters.
RoHS & REACH Compliance
All finished tungsten carbide plates, wear blanks, and ground inserts strictly conform to EU REACH (EC 1907/2006) and RoHS directives, containing no prohibited hazardous heavy metal concentrations.
DDP Global Door-to-Door Logistics
Exporting to 20+ countries including the USA, Germany, Canada, Mexico, and Australia. We handle full customs clearance, ISF filings, tariff documentation, and secure vacuum-sealed packaging for maritime and air freight.
Technology Roadmap: Next-Generation Cemented Carbides
Anticipating the demands of ultra-high-pressure manufacturing, electrification, and sustainable metallurgy, Zhongfu's technical laboratory is actively deploying next-generation material solutions.
Functionally Graded Hardmetals (FGM)
Developing gradient plates featuring a high-hardness, low-cobalt exterior layer (YG6 equivalent) for maximum abrasive resistance seamlessly bonded to an ultra-tough, high-cobalt core (YG20 equivalent) to absorb catastrophic mechanical shock without interface shearing.
Additive Manufacturing & Near-Net Sintering
Integrating binder-jet 3D printing and advanced precision molding for complex conformal-cooled carbide tooling blocks, reducing subsequent diamond grinding cycles by up to 60% and enabling internal coolant channels in thick structural wear plates.
Eco-Circular Closed-Loop Recycling
Collaborating with global enterprise partners to recover spent thick carbide dies and plates. Utilizing zinc-distillation recycling processes for secondary applications while maintaining a 100% virgin powder line for structural aerospace and automotive stamping tooling.
Frequently Asked Questions: Thick Carbide Plate Sourcing
Technical guidance from our senior engineering team to assist tooling designers and procurement specialists prior to quotation.
What is the maximum thickness and plate dimension Zhongfu can manufacture?
Through our high-tonnage isostatic pressing equipment and large-chamber Sinter-HIP furnaces, we produce solid tungsten carbide plates up to 120 mm in thickness, widths up to 400 mm, and lengths up to 800 mm as single monolithic blocks with zero internal lamination.
Why is Sinter-HIP mandatory for thick plates compared to standard vacuum sintering?
Standard vacuum sintering relies solely on capillary action during the cobalt liquid phase, which is insufficient to evacuate trapped gas and micro-shrinkage in heavy cross-sections (>20 mm). Sinter-HIP applies 100 bar of argon pressure at peak sintering temperature, forcing molten binder into micro-cavities to achieve complete theoretical density.
How do you prevent cracking during subsequent Wire EDM operations?
Residual stresses from uneven cooling are the root cause of EDM cracking. Zhongfu utilizes a proprietary thermal cycle comprising controlled cooling rates, post-sinter vacuum stress-relief annealing, and cryogenic cold-box treatment to neutralize internal tensile stresses throughout the plate volume.
Can you provide custom chemical formulations for extreme corrosion environments?
Yes. While standard WC-Co grades deliver maximum mechanical toughness, we engineer nickel-bonded (WC-Ni), nickel-chromium (WC-Ni-Cr), and titanium-carbide modified grades for wet, acidic, or marine environments where cobalt leaching occurs.
What surface finishes and machining tolerances can you supply?
We supply plates as raw sintered blanks with +0.5/+1.5 mm grinding allowances or fully finish-ground components. Using precision surface grinding, we achieve tolerances down to ±0.005 mm, parallelism within 0.005 mm, and surface roughness down to Ra 0.05 µm.
How fast can our engineering department receive a technical review and DFM feedback?
Our senior metallurgists and tooling engineers respond to all technical drawing submissions (STEP, IGES, DXF, PDF) within 8 hours, offering grade recommendations, tolerance optimization, and complete DFM manufacturability analysis.
What is the standard production lead time for custom wholesale orders?
Standard prototype blanks and custom tooling plates are dispatched within 15 to 20 working days. For repeat blanket contract orders, stock is maintained at our Nanchang warehouse for rapid dispatch within 48 hours.
What packaging standards do you implement for heavy, high-density shipments?
Tungsten carbide’s density (~14.5 g/cm³) is twice that of steel. All plates are oil-coated, hermetically vacuum-sealed in anti-corrosive plastic wrap, isolated with high-density shock-absorbing polyethylene foam, and secured inside reinforced wooden export crates.
Standard & Engineered Tungsten Carbide Solutions
From heavy railway tamping tines and non-magnetic rods to indexable milling inserts and custom roll crushers, explore our full manufacturing range.
