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  • Name: PCBN (polycrystalline cubic boron nitride)

PCBN is characteristic of high hardness, high wear resistance and high thermal stability. It’s inert to iron family element, hence PCBN is mainly used for the machining of high hardness and hard processed ferrous materials, such as harden steel, pearlitic gray cast iron, high temperature alloy, high-speed steel, hard facing alloys, Ni-Cr alloy, powder metallurgy metals.

SFD PCBN blanks for cutting tools have two series of CB and BN. CB series is composed of CBN layer and tungsten carbide base. BN series is solid CBN. Customers can choose suitable PCBN material with different CBN contents, grain sizes and grades according to turned object material.


 

High contents PCBN

Low contents PCBN

CBN Contents

80-95 Vol%

40-70 Vol%

CBN Grit Size

2~10 micron

0.5~5 micron

Binder Phase

Metal (Co, WC。。。)

Ceramics (Tic, Tin。。。)

Strength & Toughness

■■■■

■■□□

Thermal Conductivity

■■■■

■■□□

Chemical Stability

■■□□

■■■■

Wear Resistance

■■■■

■■■□

Applicable Material

Cast Iron…

Hardened Steel…

 

In general, high content PCBN is used in cast iron applications while low content PCBN is used in hardened steel applications.

 

 

Type

Solid PCBN

Grade

BN90

BN85

CBN (vol.%)

90

85

Grain size
(?)

3

3

Main Binder

Al-Co

Titanium Nitride and Aluminum

Hardness

3500-3700

3300-3500

Characteristics
&
Applications

Excellent fracture resistance, better wear resistance, good chemical stability, multi edges, long life

Excellent fracture resistance, better wear resistance, good chemical stability, fine finish, long life

Application

Hard cast iron, hardened steel, Pearlitic gray cast iron, hard facing alloy, powder metallurgy metals, fine turned nickel and cobalt base alloys etc.

Hard cast iron, hardened steel, Pearlitic gray cast iron, hard facing alloy, powder metallurgy metals etc.

 

 

Type

Carbide back supported

Grade

CB90

CB85

CB70

CB60

CB50

CBN (Vol%)

 

90

85

70

60

50

Grain size (μm)

3

3

3

3

2

Main Binder

Al-Co

Ceramic of Al system

Ceramic of Al,Ti system

TiC and TiN

TiN

Hardness (Hv)

3500~3700

3300~3500

2700~2900

2600~2800

2500~2700

Characteristics

High wear resistance, thermal stabiligy, better impact resistance, high quality surface finish

High wear resistance, better impact resistance, high cutting efficiency and long life

High wear resistance, good thermal stability

High wear resistance, strong chemical stability, good transversal rupture strength resistance.

High wear resistance, high thermal conductivity, chemical stability, fine finish and long life

Application

Pearlitic gray cast iron, tool steel, die steel, hard facing alloy, powder metallurgy metals, fine turned nickel and cobalt base alloys etc.

Hard cast iron, hardened steel, Pearlitic gray cast iron, hard facing alloy, powder metallurgy metals etc.

Machine high speed steel continuously and interruptedly etc.

Machine hardened steel, tool steel and die steel continuously and interuptedly etc.

Hardened Steel, die steel

 

PCBN blanks and Semi-finished PCBN catalogue

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