Duralor - TuffTek - Cubic Boron Nitride Based Composite Coatings

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Recommended Applications

Machining operations
Semi-finish and finish turning, wet or dry

Workpiece materials
Hardened steels such as AISI 4340 alloy steel and other steels with Rockwell C hardness in the range of 28~53

Machining parameters
Hardened steels have been machined at the following condition:

▪ Cutting speed 30k up to 150m/min (492 ft/min)

▪ Feed up to 0.15mm/rev (0.006inch/rev)

▪ Depth of cut up to 0.25mm(0.01inch)

Performance

1. Turning AISI 4340 hardened steel shaft (50~52 HRC, straight cut). TuffTek^TM outperformed TiAlN coated inserts by more than 300%.

2. Turning compressor shaft (A2 steel, 58 HRC). TuffTek^TM outperformed TiAlN coated inserts by more than 300%

Machining conditions:

V=150m/min,
F=0.15mm/rev,
Depth of cut=0.25mm,
with cutting fluid

Results:

TuffTek™ cut 9 shafts while still retaining good cutting edges; TiAlN cut typically 3 shafts.
In addition, TuffTek™ provided 50% reduction in cycle time.

Semi-finishing with TiAlN coated insert at V=300 ft/min; F=0.0043 inch/rev; Depth of cut=0.014 inch, wet.


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