Sharpened Long Blade For First Cutting Process Of Automatic
Cigarette Maker Passim 8000
Cigarette Knife is a component of cigarette making machines to
slice cigarette rod before going into the filter assembly machine.
Heat Treatment Of Martensitic Stainless Steels
Austenitizing, in which the steel is heated to a temperature in the
range 980–1,050 °C (1,800–1,920 °F), depending on grade. The
resulting austenite has a face-centered cubic crystal structure.
Quenching. The austenite is transformed into martensite, a hard
body-centered tetragonal crystal structure. The quenched martensite
is very hard and too brittle for most applications. Some residual
austenite may remain.
Tempering. Martensite is heated to around 500 °C (932 °F), held at
temperature, then air-cooled. Higher tempering temperatures
decrease yield strength and ultimate tensile strength but increase
the elongation and impact resistance.
Martensitic Stainless Steels
Martensitic stainless steels offer a wide range of properties and
are used as stainless engineering steels, stainless tool steels,
and creep-resistant steels. They are magnetic, and not as
corrosion-resistant as ferritic and austenitic stainless steels due
to their low chromium content. They fall into four categories (with
some overlap):
Usages
Ferritic stainless steels are cheaper than austenitic steels and
are present in many products, which include:
Automobile exhaust pipes (Type 409 and 409 Cb[2] are used in North
America; stabilized grades Type 439 and 441 are used in Europe)
Architectural and structural applications (Type 430, which contains
17% Cr)
Household goods, such as kitchenware, sinks, and major appliances
Building components, such as slate hooks, roofing, and chimney
ducts
Power plates in solid oxide fuel cells operating at temperatures
around 700 °C (1,292 °F) (high-chromium ferritics containing 22%
Cr)
