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Carbonaceous tool steel.
The tool steel intended for manufacturing of the cutting and measuring tool.
The main criteria of a choice of steel for manufacturing of the cutting tool are
it wear-and heat resistance, and also steel should possess the hardness exceeding
hardness of the processed material, and high durability in a combination to
sufficient viscosity.
Carbonaceous steel of the brands U7, У8, У10, У11, У12 of ordinary quality
or high-quality apply when manufacturing tool to cutting of materials of low
hardness with small speeds.
U9 steel is applied to manufacturing of the woodworking tool.
Steel U10, У11, У12 is for manufacturing of the metal-cutting tool: cutters,
drills, taps, dies, files.
Steel U8, У9, У10 are applied when manufacturing the measuring tool -
brackets, calibres etc.
Carbonaceous steel of a special purpose.
This group of steel with high technical characteristics (the raised workability
cutting, a good fusability etc.). They are intended generally for manufacturing of
products of mass production.
Automatic steel with the raised content of sulfur and phosphorus have a good
workability cutting. When processing such steel on automatic machines short
and small shaving is formed, the expense of the cutting tool decreases and the
roughness of the processed surfaces decreases. Automatic steel mark the letter
"A" and in the figures showing the average content of carbon in the 100-th
shares of percent. Apply the following brands of automatic steel: А12, А20,
А30, А40Г. A12 steel is applied to produce the irresponsible details, all other
brands of automatic steel are suitable for manufacturing of the responsible
details working at considerable tension and elevated pressures. They steel don't
apply for manufacturing of welded designs.
Boiler steel is applied to manufacturing of details and the devices working under
pressure (steam coppers, ship fire chambers, chambers of burning of gas
turbines, etc.). They work at variable pressure and temperature to 450?С, well
cook. For obtaining such properties into carbonaceous steel enter a technological
additive (titan) and in addition de-oxidize with aluminum. Let out the following
brands of carbonaceous boiler steel: 12К, 15К, 16К, 18К, 20К, 22К with the
content of carbon 0,08-0,28 in them %-also deliver in the form of sheets in
thickness to 200мм.
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