Direct OEM/ODM Foundry Sinter-HIP 10 MPa Densification Ultra-Fine Grain Matrix (0.2–0.8 µm)

Wholesale Solid Carbide Disc Plate Manufacturer & Factory

Jiangxi Apex Carbide Co., Ltd. delivers high-performance tungsten carbide disc plates, rotary slitting knives, and precision circular blanks. Engineered with 100% virgin submicron powder, low-pressure sinter-HIP metallurgical consolidation, and micron-level grinding for high-stress industrial converting.

Metallurgical Architecture

Solid Carbide Disc Plate Engineering: Material Science & Sinter-HIP Integrity

An authoritative engineering white paper on eliminating micro-porosity, optimizing cobalt binder distribution, and securing high transverse rupture strength (TRS) in rotary disc applications.

Submicron Tungsten Carbide Powder Synthesis

Solid carbide disc plates must withstand extreme tangential shear forces without edge micro-chipping. At APEX Carbide, we formulate our disc blanks utilizing 100% virgin ammonium paratungstate (APT) refined in Jiangxi. By governing WC grain sizes from ultra-fine 0.2 µm up to submicron 0.8 µm, we achieve an optimal balance between micro-hardness (up to 94.0 HRA) and structural toughness.

  • Near-zero carbon deficiency: Eliminates brittle eta-phase (W3Co3C)
  • Strictly governed free carbon: Prevents cobalt pooling and micro-voids

Low-Pressure Sinter-HIP Consolidation

Conventional vacuum sintering leaves internal micro-porosity (A04/B02) that triggers catastrophic brittle failure when high radial and axial cutting loads are applied. APEX employs computer-controlled Sinter-HIP furnaces operating at 1,450°C and 10 MPa (100 bar) argon gas overpressure. This collapses residual voids, yielding a fully dense cemented carbide matrix conforming to ISO 4505 metallographic standards.

  • Residual porosity rating below A02, B00, C00
  • Transverse Rupture Strength (TRS) elevated to > 3,800–4,200 MPa

Sub-Micron Precision Grinding & Mirror Lapping

Rotary slitting discs require extreme parallelism and runout precision to avoid burrs on sheared foils. APEX disc plates undergo dual-surface CNC planetary grinding and optical diamond lapping. We maintain flatness within 0.002 mm, parallelism within 0.003 mm, and surface finishes down to mirror-grade Ra 0.01–0.02 µm, dramatically reducing cutting friction and adhesive wear.

  • Thickness tolerances controlled to ±0.001 mm
  • Zero-flaking razor cutting edges: Micro-bevel radius < 3 µm
APEX Grade Cobalt Binder (% Co) WC Grain Size (µm) Density (g/cm³) Hardness (HRA / HV10) T.R.S. (MPa) Primary Industrial Applications
AP-06UF 6.0% 0.4 (Ultra-Fine) 14.90 – 15.02 93.2 HRA / 1850 HV 3,600 Lithium battery separator film slitting, ultra-thin metal foils
AP-08SM 8.0% 0.6 (Submicron) 14.70 – 14.85 92.4 HRA / 1700 HV 3,850 PCB electronic copper foil rotary shear, optical films, adhesives
AP-10NM 10.0% 0.8 (Fine-Submicron) 14.45 – 14.60 91.8 HRA / 1600 HV 4,100 High-speed slitter knives, corrugated board, carton creasing
AP-12CR 12.0% + Cr/Ni 0.8 (Corrosion Resist) 14.25 – 14.40 90.8 HRA / 1480 HV 4,000 Wet chemical slitting, abrasive fiberglass, chemical textile cutters
AP-15HD 15.0% 1.2 (Medium) 13.95 – 14.15 89.0 HRA / 1350 HV 4,250 Heavy-duty shock cutting, punching disc dies, cold forming wear plates
Supply Chain Dominance

Why Global Buyers Source Solid Carbide Disc Plates From Jiangxi, China

Leveraging China's tungsten belt advantages to offer unmatched cost-to-performance, metallurgical purity, and industrial scalability.

Mine-to-Blank Vertical Integration

Jiangxi holds over 60% of the world’s prime tungsten ore reserves. Our manufacturing facilities in Nanchang procure high-purity APT directly from local smelters, bypassing international raw material markups and eliminating supply chain bottlenecks.

Massive Manufacturing Scale

Operating 3 specialized manufacturing plants with over 500 skilled personnel and 200+ dedicated metallurgical engineers. With over 1,000,000 parts monthly capacity, we comfortably handle low-volume custom prototyping alongside massive OEM container contracts.

Uncompromising Cost Parity

Direct factory sourcing removes layered trading markups. By uniting powder milling, die compacting, Sinter-HIP densification, and CNC grinding under one roof, we provide tier-1 European quality at competitive factory pricing.

Rapid 7–25 Day Production Velocity

Standard disc blanks and stock circular slitter rings ship within 48–72 hours. Custom engineered non-standard disc plates made to customer drawings undergo CAD review, tooling production, sintering, and inspection within 7–25 business days.

20+
Years Industry Experience
3
Modern Production Plants
5,000+
Global Clients Served
< 0.002mm
Parallelism Tolerance
Enterprise Sourcing & Compliance

Localized Regulatory Assurance & Risk Mitigation for Global OEMs

Overcoming international trade barriers through rigorous QA governance, metallurgical trace certificates, and full environmental compliance.

Complete EN 10204 3.1 Traceability

Each production batch of solid carbide disc plates ships with verifiable Mill Test Certificates (MTC). We catalog density, coercive force (Hc), magnetic saturation (4πσ), Rockwell hardness (HRA), and grain size micro-photos to guarantee batch-to-batch consistency.

RoHS, REACH & Conflict-Free Minerals

APEX products fully comply with EU Directive 2011/65/EU (RoHS 2.0) and REACH (EC 1907/2006) SVHC chemical requirements. All Tungsten (W) and Cobalt (Co) raw materials are sourced from audited, conflict-free smelters meeting OECD Due Diligence Guidance.

Dedicated Global Engineering Support

Technical sourcing managers demand frictionless technical dialogue. Our English-speaking application engineering desk provides DFM (Design for Manufacturability) reviews, CAD drawing validation, edge bevel optimization, and export packaging (individual vacuum dipping & rust-inhibitive sealing).

High-Stress Applications

Mission-Critical Industrial Applications of Solid Carbide Disc Plates

Engineered for clean cut geometries, prolonged continuous operating cycles, and zero thermal deformation across demanding converting sectors.

Lithium-Ion Battery Slitting

In EV battery manufacturing, slit edges on cathode (aluminum coated with LiCoO2/NCM) and anode (copper foil coated with graphite) must be 100% free of burrs, flaking, or edge waves to prevent short circuits. APEX ultra-fine solid carbide disc slitting knives deliver continuous cutting lifespans exceeding 300,000 meters before regrinding, maintaining burr heights under 3 µm.

PCB, Electronic Film & Flexible Copper Foil

High-density interconnect (HDI) substrates and flexible printed circuits require micro-slitting of ultra-thin copper and polyimide films. APEX disc plates, lapped to mirror finishes with sub-micron axial runout, prevent adhesive buildup, tear deformation, and copper delamination at shearing speeds reaching 600 m/min.

Corrugated Board, Paper & Packaging Converting

Modern corrugators utilize continuous rotary thin-blade slitters. Our cemented carbide rotary knives offer wear resistance 20 to 40 times higher than tool steels, delivering clean, uncrushed flutes, minimal dust generation, and prolonged edge retention even on recycled, silica-heavy paper stocks.

Procurement & Technical FAQ

Frequently Asked Questions: Sourcing Solid Carbide Disc Plates

Direct answers to the metallurgical, tolerance, logistical, and commercial inquiries most often raised by international buyers and tool engineers.

What is the typical hardness and TRS of APEX solid carbide disc plates?

Depending on cobalt binder volume (typically 6% to 15%), our solid carbide disc plates feature a Rockwell hardness ranging from 89.0 HRA to 93.8 HRA (equivalent to approx. 1350 to 1950 HV10). Because our parts undergo low-pressure Sinter-HIP processing at 10 MPa, Transverse Rupture Strength (TRS) reaches 3,800 to 4,250 MPa, preventing brittle fractures under heavy lateral pressure.

What geometric tolerances and surface roughness can your factory hold?

For ground disc plates and rotary circular knives, our standard outer diameter (OD) tolerance is ±0.005 mm (or h6/h5 on request). Inner bore diameter (ID) is held to H6/H5 (+0.005 mm / -0.000 mm). Thickness is held within ±0.002 mm, parallelism within 0.003 mm, and axial/radial runout within 0.003 mm. Double-sided diamond mirror lapping achieves surface finishes down to Ra 0.015 µm.

Can you manufacture custom-shaped disc plates or custom bevels to drawing?

Yes. Over 60% of our production volume is OEM/ODM manufactured to client blueprints or physical samples. We produce single-bevel, double-bevel, hollow ground, compound compound-angle bevels, scalloped edges, slotted center bores, and drive pin holes. Simply send your STEP, DXF, or PDF engineering drawing for a prompt feasibility and quote review.

What are your minimum order quantities (MOQ) and production lead times?

We support trial validation and sample testing with an MOQ starting from just 1 piece for standard sizes. Standard unground blanks ship in 3–5 days. Custom sintered and precision-ground disc plates generally require 7 to 25 business days depending on geometric complexity and quantity. Urgent prototyping batches can be expedited via dedicated CNC machining lines.

How do you guarantee quality and prevent edge flaking during transport?

Every disc plate passes 100% optical dimensional inspection on Zeiss CMM and high-magnification toolmaker microscopes. Ground cutting edges are dipped in protective peelable thermoplastic wax or fitted with silicone protective edge guards. Parts are vacuum sealed in anti-corrosion VCI bags and cushioned in custom shock-resistant cases for secure global shipping via DHL/FedEx or sea freight.

What documents are supplied for customs clearance and regulatory audits?

We provide full export documentation including Mill Test Certificates (EN 10204 3.1) showing density, HRA, and chemical composition; Certificates of Origin (CO, Form E, Form A); RoHS and REACH SVHC compliance declarations; and CMRT (Conflict Minerals Reporting Template) declarations verifying responsible mineral sourcing.

Direct Foundry Engineering Consultation

Ready to Optimize Your Slitting Performance & Lower Carbide Tooling Costs?

Connect directly with Jiangxi Apex Carbide’s metallurgical engineers. Send your CAD blueprints, target cutting materials, and annual volume requirements to receive comprehensive grade recommendations, tolerance analyses, and transparent wholesale quotes within 24 business hours.

Contact Senior Technical Engineer Download Engineering Catalog & Grade Datasheets