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oxidation and an decarburization. For reduction of number of operations of
water tempering after training of steel it process cold (-80?С).
For increasing of wear resistance the tool from fast-cutting steel subject to
cyanidation.
On cutting properties of fast-cutting steel divide on:
- normal productivity (tungsten Р18, Р12, Р9, Р9Ф5 and tungsten-molybdenum
Р6М3, Р6М5), with heat resistance of the tool to 620?С.,
- the increased productivity, incorporating cobalt, or with the raised content of
vanadium (brands R18F2, Р14Ф4), with heat resistance of the tool to 640?С.
The tool from fast-cutting steel apply mainly to cutting of high-strength and
hard to treat 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 of steel of brands X, HVG, HG, 9HS found the
widest application for manufacturing of the measuring tool tempered to hardness
of 57-60 HRC. Training carry out in oil at temperature 840-880. The tool of the
increased accuracy subject to processing by cold at 50-80below.
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