Case StudY
Hard Metal Matrix CompositesINTRO
Cryogenic Machining of Carbide Die (88 HRa)
Part: Carbide Die
Work Material: WC-13%Co
Operation(s): ID Boring, Facing
Tooling: CNGA 433 (QRD06) PCD
Depth of Cut: 0.020”
Feed: 0.003” /rev.
Speed: 150 SFM
Cut Time: 11 min.
Surface Roughness: 12 micro-inches
Tool Wear: Minor edge wear
Industrial Cryotech’s CryoCut 2.5™ reduced machining time for large dies from 4 hrs (grinding) to 15 min (hard turning)
Customer used to stock a large inventory with varying sizes and approach angles. With CryoCut 2.5™, significant inventory reduction was possible.
Customer was also able to accept jobs with significantly high material removal and deliver faster turnaround times.


Machining of Carbide Punches
Part: Carbide Shaft (80 HRc)
Work Material: WC-10%Co
Operation(s): ID turning, profiling
Current rough grind time on the ID is 100 min. With Industrial Cryotech, the ID was turned in 20 minutes.
Operation(s): ID Turning (Roughing, Finishing)
Tooling: DCMT 32.52, CNMA 433, RCMA 32 (QRD06) PCD
Depth of Cut: 0.003 – 0.016”
Feed: 0.002 – 0.006”
Speed: 80 SFM
Surface Roughness: 16-24 micro-inches
Total Cut Time: 20 min.
Machining of Unfused Carbide Thermal Spray Coating
Machine: Fortune V-turn VT 2 C.N.C. lathe
Tool/Insert: RCMA042 QRD06
Cut. Cond.: Speed: 80 SFM
Feed: 0.005”
Doc: 0.010”
Tool life: >15 pcs. (Insert still usable after 15 pcs, flank wear 0.039 mm)
Cycle time: 75 min. (60 min. grinding + 15 min. polishing) (current)
Cycle time: 8.5 min. (3.5 min. hard turning + 5 min. polishing) (ICEFLY)


Machining of SS Thermal Spray Coating
Part: 29” diameter part with four slots (SS thermal spray coating)
Operation: Turn O.D. (Grinding is customer’s current process)
Machine: King boring mill (72 inch table)
Tool/Insert: Sandvik RNGN CB5 (PCBN)
Cut. Cond.: Speed: 260 SFM (29 rpm)
Feed: 0.012”
Doc: 0.010”
Tool life: >30 min. (Insert still usable after 30 min. with minimal flank wear)
Machining of Stellite Coatings (55-58 HRc)
Part: Ring
Work Material: Stellite
Operation(s): OD Turning (Roughing, Finishing)
Tooling: RNGN 43T (WG300) Whisker Ceramic
Depth of Cut: ~0.040” (Rough) 0.013” (Finish)
Feed: 0.007” /rev. (Rough) 0.005” (Finish)
Speed: 400 SFM
Surface Roughness: 6 micro-inches
Total cut time: 2.5 min.
Current machining time is 20 min./part. With CryoCut 2.5™, the entire machining was completed in 2.5 min.
With CryoCut 2.5™, the part was machined with whisker reinforced ceramics, with significant reduction in tooling cost/part, over conventional PCBN tooling.


CryoCut 2.5™ vs. Conventional Machining
Surface finish improvement by 75%, to eliminate superfinishing.
6–10% improvement in substrate hardness.
Higher compressive residual stress and deeper hardness profile through spring-pass cryo-burnishing.

Temperature Comparison Between LIN and Dry Cutting
Material: WC/15%Ni (74 HRc)
Insert: RNG 32 (PCD)
Depth of Cut: 0.008” Feed: 0.004” Cutting Speed: 250 SFM


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