198
For wear resistance increase the tool from quick
cutting steels subject to
cyanation.
On cutting properties quick cutting steels divide on:
- normal productivity (tungsten R18, R12, R9, R9F5 and tungsten-molybdenum
P6M3, P6M5), with heat resistance of the tool to 620?С.
- the increased productivity, incorporating cobalt, or
with the raised content of
vanadium (R18F2, R14F4, R18K5F2, RUM4K8 brands), with heat resistance of
the tool to 640?С.
The tool from quick cutting steels is applied mainly to cutting of high-strength
and hardly processed materials.
Steel for the measuring tool possess high wear resistance and property to keep
the stable sizes and a form of products for a long time.
High-carbonaceous chromic steel of brands H, HVG, HG, 9HS, 12X found the
broadest application for production of the measuring tool tempered to hardness
57-60 HRC.
Steel of brands 15X, 20X, 12XH3A are used at production of flat and lengthy
measuring tools. Hardness penetration of a surface coating, as a rule, the
currents of high frequency (CHF) that allows to provide high wear resistance of
a surface of the tools at preservation of stability of their sizes.
Достарыңызбен бөлісу: