Cemented Carbide Tool Wear Characteristics and Composition

Cemented carbide tool wear includes abrasion wear, crater, chipping, thermal cracking, gap, abnormal debris, etc.

The mechanism of various cemented carbide tool wear occurred associated with the characteristics of the cemented carbide tool wear as shown in the table below.

Wear Classification	Wear Form	Cemented Carbide Tool Wear Mechanism	Cemented Carbide Tool Wear Characteristics& Composition
Abrasion wear	Wear and tear	Shedding of smaller particles in relatively small when the frictional heat caused by tiny particles of the workpiece material in the hard particles or falling from the cemented carbide.	Hardness, compression strength, the content of Co, the particle size of the WC (carbide)
Thermal wear	Wear and tear	When used at high temperatures, or as the friction heat, the bonding strength of the alloy becomes lower, and promotes wear	Hardness, compression strength, thermal conductivity, the content of Co, the content of TiC and TaC
BUE	Wear,Crater, fragmentation	Under high pressure to friction, the partial adhesion of the workpiece material and tool, and when the higher strength than the bonding strength of the alloy, the occurrence of slight shedding, thereby generating abrasion and chipping	Hardness, compression strength, toughness, the content of Co
Bonding diffusion	Crater	Under high temperature, high pressure, the contact of the tool and the workpiece material, or a large amount of frictional heat is generated, since the adhesion and diffusion, alloy deteriorated accelerate wear	The content of TiC, TaC and Co, WC (carbide) particle size
Plastic deformation	Deformation, concave, the projection, the cutting edge is crooked, notched, wear	Due to high temperature so that the strength becomes low, or by the force above the elastic limit, so that the deformation of the adhesive layer, and then generate the notch, cracking etc.	Hardness, compression strength, elastic limit, toughness, Co content
Notch cracks	Cracking, collapsing, chipping	Internal deformation, mechanical shock, the plastically deformed, due to repeated fatigue stress changes, or exceeds the critical strength, partially collapse or cracking occurred, severe become damaged	Toughness, tensile strength, characteristics withstand impact force, the content of Co, the particle size of the WC (carbide)
Thermal cracking	Cracking, collapse	Cracking even destruction occurs due to thermal shock or local heating,	Toughness, thermal expansion coefficient, thermal conductivity, the content of TiC, TaC and Co

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