High
Speed Steels M2
For
modern industrial production, in particular mass
production, machining is one of the most important shaping
and forming processes. Almost all tools employed are made
form High Speed Steels. In recent times, the use of High
Speed Steels for chinless shaping a well, i.e. for tools
like cold extrusion and punching dies, is gaining in
importance.
Characteristic properties of all High Speed Steels are:
-
Superior working hardness
-
High
wear resistance
-
High
retention of hardness and red hardness
-
Excellent toughness
Influence
of alloying elements on steel properties:
Carbon:
Produces carbide, increases wear resistance, carries
matrix hardness.
Tungsten
and Molybdenum:
Improve red hardness, retention of hardness and high
temperature strength of matrix, form special carbide of
great hardness.
Vanadium:
Forms special carbides of superior hardness, increase high
temperature wear resistance, retention of hardness and
high temperature strength of matrix.
Chromium:
Promote depth hardening, produces readily soluble
carbides.
Cobalt:
Improves red hardness and retention of hardness in matrix.
Chemical
composition / Equivalent grade
Standard DIN AISI
BS AFNOR
1.3343 S6-5-2
M2 BM2 Z85WDCV 06-08-04-02
SIS
JIS UNI
GOST
2722 SKH9 HS
6-5-2 R6M5
M2 C Mn Si
Cr V W Mo
0.78 0.20 0.20
3.75 1.60 5.50 4.50
0.88 0.40 0.40
4.50 2.20 6.75 5.50
|
