Page 451 - Hartner

Hartner
tool materials

Carbide

Material selection Main material group S
Dependent on the specific application task, the various attributes Heat-resistant “super alloys” based on iron, nickel or cobalt as well as
must, therefore, be carefully balanced. Subsequently, there are vario- titanium alloys are included in group S.It is divided into the application
us carbides available. In order to find the correct carbide for a speci- groups 01-30, dependent on the cutting load.
fic application task, several classification systems were experimented
with and introduced as standard to simplify the selection. Widely ac- Main material group N
cepted is the DIN ISO classification system to DIN ISO 513. This group includes non-ferrous metals, especially aluminium-alloys
and non-metal materials. The group is subdivided into the application
A classification letter describes the application ranges of carbide and groups 01-40, dependent on the cutting load.
coating combinations, a classification number describes the hard-
ness and toughness balancing. A small classification number signs a Main material group H
high hardness of the application, a high number the toughness. This group includes hard machining of hardened steels. The applica-
tion groups are from 01-30, depending on the cutting load.
Main material group P
This group includes long-chipping ferrous metals except stainless Many carbide grades cover the broad spectrum of the main material
and austenitic steels and is, according to the cutting load, divided groups, especially when coated tools are applied. For example, most
into the application groups 01-50. of the FIRE-coated carbide drills in the Hartner range are assigned to
the main material groups K and P.
Main material group M
Group M includes austenitic stainless steels, austenitic/ferritic steels Individual Hartner grades
and cast steels. The group is subdivided into the application groups The following table lists the most important carbides that are availa-
01-40, dependent on the cutting load. At Hartner, P and M applica- ble from Hartner ex-stock for general applications. Further carbide
tions are achieved with coated K carbide. grades are available on request. In more than 80% of applications
known to Hartner, the results of DK460UF carbide grade tools toge-
Main material group K ther with a specially adapted coating could not be surpassed by any
Group K incorporates all forms of grey cast iron and malleable cast other carbide grades, including coated tools. This and the availability
iron. Dependent on cutting load it is subdivided into the application of the material ex-stock simplify tool selection immensely. For further
groups 01-40. information regarding the application of other carbide grades please
contact our technical engineers.

Description Co-content Tungsten carbide Hardness ISO classification Characteristics
[M-%] grain size [µm] [HV] [ISO 513]

DK460UF 10 0.5 1620 K20-K40 A carbide grade with wide range of application possibili-
coated: ties.It is applied, mostly coated, for the machining of steel,
P, M20-M40, H, S, soft Al alloys, cast iron as well as “super alloys” such as
N25 Inconel 718. This grade is the backbone of our carbide
production.
DK255F 8 0.7 1720 K20 The grade is recommended for hard machining, the
coated: machining of high tensile grey cast iron and hard AlSi-
P, M, H, S, N20 alloys. Dry machining is possible. A coated application is
preferable.

DK120 6 1.3 1620 K15 The grade is especially suitable for the application with
coated: diamond coating.
N15

DK120UF 7 0.5 1850 K05 Ultra fine grain type offering extreme wear resistance, sui-
table for absolutely rigid machines, preferred for reamers.

DK400N 10 0.7 1580 K35M coated: An extremely tough grade for the machining of high heat
P, M, S, N35M resistant metals.

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