2012-02-20

Characteristics of Tungsten Carbide Cutter

Characteristics of Tungsten Carbide Cutter

There are two grades of cemented carbide, tungsten carbide and tungsten steel.

One is pure carbide and anti hole types. Pure carbide contains carbides and cobalt only, with best strength and anti-wear characteristics, and its strength and abrasion resistance will be reduced by adding any other substances, it is usually used for cutting cast iron and non-ferrous metal materials. But the pure carbide cannot endure high temperature, its scrap will stick on the cutter blade face easily during high heat, which causes the flank depression by its diffusion. Carbide added tantalum carbide and titanium carbide is with high temperature resistance because these two ingredients are with higher melting point than tungsten carbide, relatively its strength and anti-ear characteristics are lower than pure carbide.

tungsten steel material properties:

ISO
classification		 Grade Usage Rockwell Hardness Bending Force Ingredients
HRA (kg/mm2) W Co Ti Ta C
P P01 toughness↓big
big↑wear		 91.5↑ 70↑ 30-78 4-8 10-40 0-25 7-3
P10 91↑ 90↑ 50-80 4-9 8-20 0-20 7-10
P20 90↑ 110↑ 60-83 5-10 5-15 0-15 6-9
P30 89↑ 130↑ 70-84 6-12 3-12 0-12 6-8
P40 88↑ 150↑ 65-85 7-15 2-10 0-10 6-8
P50 87↑ 170↑ 60-83 9-20 2-8 0-8 5-7
M M10 toughness↓big
big↑wear		 91↑ 100↑ 70-86 4-9 3-11 0-11 6-8
M20 90↑ 110↑ 70-86 5-11 2-10 0-10 5-8
M30 89↑ 130↑ 70-86 6-13 2-9 0-9 5-8
M40 87↑ 160↑ 65-85 8-20 1-7 0-7 5-7
K K01 toughness↓big
big↑wear		 91.5↑ 100↑ 83-91 3-6 0-2 0-3 5-7
K10 90.5↑ 120↑ 84-90 4-7 0-1 0-2 5-6
K20 89↑ 140↑ 83-89 5-8 0-1 0-2 5-6
K30 88↑ 150↑ 81-88 6-11 0-1 0-2 5-6
K40 87↑ 160↑ 79-87 7-16 -- -- 5-6

tungsten steel tool suitability:

ISO
classification 		Grade Work Material Cutting Type Working Conditions
P P01 cast steel, steel Precise turning, precise boring Apply to cutting high-speed steel and small feed, or require the dimensional accuracy and good surface of the work piece, and work under no vibration state of processing.
P10 cast steel, steel turning, by die cutting, thread cutting High ~ middle speed cutting, Small ~ middle milling area, middle feed or under good processing
P20 cast steel, steel、malleable iron (Long chip) Turning, by the die cutting, milling, planning cutting Middle speed cutting, middle feed power, the most popular one among P series.   Planning feed should be small, with good machining conditions.
P30 cast steel, steel、malleable iron (Long chip) turning, milling, planning Low ~ medium-speed cutting, medium ~ high amount of feed, or the surface hardness of work piece with uneven hardness, changes of feeding, and vibration conditions .
P40 Steel, cast iron with sand hole turning, planning low-speed cutting, large amount of feed, and under the worst processing conditions
P50 low to middle tensile strength steel turning, planning low-speed cutting, large amount of feed, and under the worst processing conditions
cast iron with sand hole turning, planning low-speed cutting, large amount of feed, and under worse processing conditions than P40
M M10 steel, cast steel, cast iron turning medium to high-speed cutting, small to medium amount of feed, or under the better processing conditions, for cutting steel and cast iron materials.
High manganese steel, Eos Tiantie Gang, special cast iron turning Medium to high-speed cutting, small to medium amount of feed, or under the better conditions.
M20 steel, cast steel, cast iron turning, planning Middle speed milling, medium feed, or under bad processing conditions, for cutting steel and cast iron materials.
Eos Tiantie Gang, special cast iron, high manganese steel turning, planning Medium speed milling, middle feed,, or cut under a good processing conditions.
M30 steel, cast steel, cast iron, Oswald Tiantie Gang, special cast iron, heat-resistant steel turning, milling, breaking Medium speed milling, middle to large amount of feed, or thick rough material and material with sand holes, welding materials, under worse processing conditions than M20.
M40 cutting steel, non-ferrous metal turning, breaking High speed cutting, middle to large amount of feed, complex shape of the cutting edge, it’s the M Series most needed toughness cutting processing conditions.
K K01 cast iron precision turning, precision honing, fine milling High speed cutting, small amount of feed, under good cutting conditions without vibration.
K10 chilled cast iron, hard cast iron, hardened steel turning very low speed cutting, small amount of feed, under good cutting conditions without vibration.
High silicon aluminum alloy, ceramics, asbestos, cardboard, graphite,   Cutting under good cutting conditions without vibration.
cast iron above HB200, malleable iron (long cutting) turning, milling, honing cutting, broaching, reaming

Middle speed cutting, small amount of feed, widely used for K series, or under vibration-free machining conditions.
chilled steel turning low-speed cutting, small amount of feed or under cutting conditions of smaller vibration.
silicon-aluminum alloy, hard copper alloy, hard rubber, glass, porcelain, plastics   under cutting conditions of smaller vibration.
K20 Cast iron belowHB220 turning, milling, planning, reaming, drilling Middle speed cutting, medium to large amount of feed, used for general machining or request of the powerful the wayward processing conditions
Non ferrous metal materials   Request under powerful the wayward processing conditions
K30 low tensile strength steel, low hardness cast iron turning, milling, planning low speed cutting, small amount of feed, under better processing conditions.
K40 non-ferrous metal of low hardness materials, wood turning, milling, planning cutting under the conditions worse than K30
Reference Information Source: tool designed Huang Rongwen
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