
Case Studies
Case I
Workpiece |
Gear |
Cutting inserts |
PCBN – SNGN201020 |
Workpiece Materials |
40CrMo (45-55HRC) |
Cutting Parameters |
Roughing: Ap=4mm, f=0.7mm/r |
Finishing: Ap=0.5mm, f=0.6mm/r |
|
Cutting Method |
Gear Top cylindrical Turning |
|
|
Comparison
Comparison |
Cutting Speed |
Efficiency |
Life |
Carbide inserts |
20m/min |
20h/pcs |
0.25pcs/edge |
MORESUPERHARD
CBN inserts |
50m/min |
2h/pcs |
2pcs/edge |
Case II
Workpiece |
Bearing |
Cutting inserts |
PCBN—SNGN150720 |
Workpiece Materials |
Gr15 (55-62HRC) |
Cutting Parameters |
Vc=120m/min |
Ap=4mm |
|
f=0.1mm/r |
|
Cutting Method |
Cylindrical / Face turning |
|
|
Case III
Workpiece |
Rotary Support Bearing |
Cutting inserts |
PCBN—RCGN090700 |
Workpiece Materials |
42CrMo (47-55HRC) |
Cutting Parameters |
Vc=90m/min |
Ap=0.2mm |
|
f=0.3mm/r |
|
Cutting Method |
Inner Circle Turning |
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Comparison
Comparison |
Cutting Speed |
Efficiency |
Life |
Coated Alloy |
50m/min |
2h/pcs |
1pcs/edge |
MORESUPERHARD
CBN inserts |
90m/min |
30min/pcs |
4pcs/edge |
Case IV
Workpiece |
Crankshaft |
Cutting inserts |
PCBN—DNGA110408 |
Workpiece Materials |
42CrMo (42-47HRC) |
Cutting Parameters |
Vc=170m/min |
Ap=0.3mm |
|
f=0.1mm/r |
|
Cutting Method |
Excircle Interrupted Wet Turning |
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Comparison
The silicon carbide substrate preparation process mainly includes raw material synthesis, silicon carbide crystal growth, ingot processing, ingot cutting, cutting piece grinding, grinding piece polishing, polishing piece cleaning, etc.Among them, the key and difficult points of preparation are mainly the crystal growth, cutting, grinding and polishing links, which are the key points and difficulties in the entire substrate production process, and become the bottleneck that limits the yield rate and production capacity of silicon carbide.
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