Cemented Carbide MIM Parts: The Complete Guide to WC-Co Precision Components

Cemented carbide MIM parts are composite components made from hard carbide particles, typically tungsten carbide (WC), bonded by a metallic binder such as cobalt (Co). Metal injection molding (MIM) produces complex, near-net-shape WC-Co parts with high precision, uniform density, and over 95% material utilization.

What Are Cemented Carbide MIM Parts?

Cemented carbides, also known as hard metals (Hartmetall in German), are composite materials consisting of hard carbide particles (typically tungsten carbide WC) bonded together by a metallic binder (usually cobalt Co). MIM technology enables the production of complex cemented carbide components with near-net-shape precision.

Why Use MIM for Cemented Carbide?

Traditional cemented carbide manufacturing relies on pressing and sintering, which limits geometric complexity. MIM breaks through these limitations:

• Complex geometries: Helical shapes, internal channels, undercuts impossible with pressing
• Near-net-shape: Minimal grinding required, reducing cost by 30-50%
• Consistent quality: Uniform density distribution throughout complex parts
• Material efficiency: Over 95% material utilization vs 60-70% with machining

Key Properties of WC-Co MIM Parts

Property	Typical Value
Hardness	85-93 HRA (1400-1800 HV)
Density	14.0-15.0 g/cm³
Transverse Rupture Strength	2500-4000 MPa
Fracture Toughness	8-15 MPa·m½
Maximum Service Temperature	500-800°C

Applications of Cemented Carbide MIM Parts

• Cutting Tools: Drill bits, end mills, inserts, saw tips with complex chip-breaking geometries
• Wear Parts: Nozzles, seals, bearings, valve components for abrasive environments
• Metal Forming: Drawing dies, extrusion dies, cold heading tooling
• Precision Instruments: Watch components, measuring tool tips, surgical instruments
• Oil & Gas: Downhole tool components, choke beans, sand control screens

Ningbo Precision Tech: Your Partner for Carbide MIM

We offer cemented carbide MIM production with WC-Co grades from 6% to 15% cobalt content, custom formulations available upon request. Our process delivers density above 98% theoretical with excellent hardness and wear resistance.

Contact our team to discuss your carbide MIM component requirements.

Frequently asked questions

What are cemented carbide MIM parts made of?

They are composite materials consisting of hard carbide particles (typically tungsten carbide) bonded by a metallic binder (usually cobalt).

What are the typical properties of WC-Co MIM parts?

Typical properties include hardness of 85-93 HRA, density of 14.0-15.0 g/cm³, transverse rupture strength of 2500-4000 MPa, and fracture toughness of 8-15 MPa·m½.

What are common applications of cemented carbide MIM parts?

Common applications include cutting tools, wear parts, metal forming dies, precision instruments, and oil and gas components.