Application Case

Halnn wear-resistant CBN inserts for processing iron-based powder metallurgy

Introduction：Powder metallurgy material is a kind of special material. Its difficult processing problems are mainly the wear resistance of the tool and the poor processing effect, so it is very important to choose the right tool.

Halnn wear-resistant CBN inserts for processing iron-based powder metallurgy

Powder metallurgy material is a kind of special material. Its difficult processing problems are mainly the wear resistance of the tool and the poor processing effect, so it is very important to choose the right tool.

iron-based powder metallurgy

Characteristics of iron-based powder metallurgy parts

Porous structure: Porosity leads to easy fatigue of the cutting edge of the tool, resulting in accelerated wear and even chipping

low thermal conductivity: The cutting temperature is very high, which can easily lead to tool wear and even deformation, requiring frequent tool changes, or causing parts to be scrapped.

High hardness: The material hardness too high, which is easy to cause accelerated tool wear

iron-based powder metallurgy parts

Halnn CBN tools turning Iron-based powder metallurgy turning advantages

Halnn CBN tools have higher wear resistance and lower surface roughness (surface finish) when turning powder metallurgy materials. For powder metallurgy, Halnn BN-K50, BNK30, BN-K10, BN-H21 (intermittent) grade CBN cutting tools are prefect.

Halnn CBN tools

Halnn CBN tools turning iron-based powder metallurgy cutting parameters

Machining material	Recommended cutting parameters			CBN insert Grade
	Cutting speed VC(m/min)	Cutting Depth ap (mm)	Feed Rate Fr(mm/r)
Powder metallurgy	80-150(Roughing)	≥0.5mm	0.1-0.5	BNK30, BN-K10, BN-K50, BN-H21
	90-350(Finishing)	≤0.5mm	0.1-0.2

Application case

Workpiece: Synchronized pulley(Finishing)
Material: Powder metallurgy
Insert Type: BN-K50 DCGW11T304
Cutting parameters: Vc=150m/min, Fr=0.1mm/r, ap=0.2mm
Processing method: Dry cutting
Insert grade	Roughness	Tool Life/edge
Halnn BN-K50	≤Ra0.8	450 pcs
Other CBN inserts	Ra1.0	300 pcs

Workpiece: Valve seat ring
Material: Powder metallurgy
Insert Type: BN-K10 CCGW060204
Cutting parameters: Vc=160m/min, Fr=0.03mm/r, ap=0.05mm
Processing method: dry cutting
Insert grade	Cutting Speed	Tool Life/edge	Roughness
Halnn BN-K10	160m/min	400pcs	≤Ra0.8
Other CBN inserts	130m/min	280pcs	Ra1.0

Workpiece: Powder high speed steel mold (HRC65)
Processing conditions: Heavy interrupted cutting
Insert Type: BN-H21 CNGA120408
Cutting parameters: Vc=35-60m/min, Fr=0.1mm/r, ap=0.15mm
Processing method: Dry cutting
Insert grade	Tool Life/edge	Failure Mode
Halnn BN-H21	5pcs	Normal Wear
Other CBN inserts	<1pcs	Broken

Workpiece: Gearbox hub (face machining)
Material: Powder metallurgy
Insert Type: BNK30 CNGA120408
Cutting parameters: Vc=200m/min, Fr=0.1mm/r, ap=0.25mm
Processing method: Dry cutting
Insert grade	Tool Life	Efficiency
Halnn BNK30	700pcs	Improved 2.5 times
Coated carbide inserts	60pcs	------