+86 0579-82212685
sjz@cnzhongye.cn
中文

PCBN Series

Polycrystalline Cubic Boron Nitride (PCBN)
-The Choice for Ferrous Metalwork

PCBN Material performance introduction

Cubic Boron Nitride Composite Sheet (PCBN) for processing ferrous materials

Polycystalline Cubic Boron Nitride Composite Sheet (PCBN) has high hardness and wear resistance. The hardness of PCBN is generally HV3000-5000, and the heat resistance can reach 1400-1500 ℃. It also has good red hardness and high anti oxidation ability. Polycystalline PCBN does not undergo oxidation at 1000 ℃ and does not undergo chemical reactions with iron-based materials at 1200-1300 ℃. The thermal conductivity of tools made of PCBN is lower than that of diamond but much higher than that of hard alloy, which is beneficial for improving the machining accuracy and surface smoothness of workpieces. The friction coefficient of tools made of PCBN for processing different materials is between 0.1 and 0.3, which is much lower than that of hard alloy (0.4 to 0.6), making it less likely for CBN tools to form retention layers or chip deposits during cutting.

Product Comparison

ComparePCBNCarbides
Hardness4,000~5,000HV (rnd.)1,500~2,500HV
Thermal Conductivity40~60w/m·K30~200W/m·K
Friction Coefficient0.05~0.10.2~0.4
Thermal Expansion Coefficient (TEC)2.0E-6~3.0E μm/m·K4.5E-6~7E-6μm/m·K
AffinityLOW (rel.)HIGH

Our PCBN

Advantages of PCBN tools in cutting

High hardness and wear resistance
  • The hardness of PCBN composite sheet is generally HV3000 ~ 5000, which is the second high hardness material known at present.
  • Higher wear resistance than hard alloys and ceramics for high hardness materials in process
Lower coefficient of friction
  • The coefficient of friction between CBN and different materials is between 0.1 and 0.3, which is much lower than the friction coefficient of cemented carbide (0.4 to 0.6).
  • Low coefficient of friction makes it difficult for CBN tools to form a retention layer or built-up edge when cutting
High chemical stability
  • CBN has high oxidation resistance and does not oxidize at 1000 °C.
  • Does not react chemically with iron-based materials at 1200 ~ 1300 °C
  • It will hydrolyze with water at around 1000 °C, causing a large amount of CBN to be worn.
High thermal stability and high temperature
  • The heat resistance of PCBN can reach 1400 ~ 1500 °C.
  • Have good red hardness.
Good thermal conductivity
  • The thermal conductivity of CBN materials is lower than that of diamonds but much higher than that of hard alloys.
  • Conducive to the improvement of workpiece processing accuracy

PCBN composite sheet
specifications and performance table

Specification modelZYN-90ZYN-80ZYN-60
CBN content90%80%60%
CBN granularity4um3um3um
Binding agentWolfram, cobalt, aluminum, titanium nitrideTitanium based binder,titanium carbonitrideTitanium carbide, titanium nitride
Structural featuresFor general-purpose materials, micron-sized CBN particles have excellent fracture toughness and wear resistance.Good wear resistance and impact resistance, excellent chemical resistance, fine grain size and high toughnessCBN has small particle size, low concentration, good wear resistance, impact resistance and chemical stability.
Application fieldSuitable for processing all types of materials, continuous and moderate interrupted cutting, cast iron, hardened steel, both toughness and high wear resistanceSuitable for processing all kinds of powder metallurgy materials, suitable for high-speed and high-speed processing of hardened steel with hardness greater than HRC45 (suitable for continuous, intermittent processing, and coarse and fine machining)Good continuous edge machining for ferrous materials, high tool life and high workpiece quality, suitable for all kinds of hard cutting, and excellent for continuous and medium interrupted cutting. Recommended for Processing hardened steel

PCBN Application field

High speed steel,  Hardened steel,  Cast  Iron,  Hard cast iron,  Heat resistant alloy steel, Powder metallurgy,  High cobalt chromium molybdenum corrosion resistant alloy