Hollow Rod Specialized Round Blade For Cigarette Filter Cutting
Mounted In Cigarette Production Machine
Filter Knife is a component of cigarette making machines to slice
filter rod after being connected to cigarette rod.
1. Resistance To Ferric Oxide Formation
Stainless steel's resistance to ferric oxide formation results from
the presence of chromium in the alloy, which forms a passive film
that would protect the underlying material from corrosion, and can
self-heal in the presence of oxygen. Corrosion resistance can be
enhanced further, by:
addition of molybdenum (which also improves resistance to "pitting
corrosion")
increasing the chromium content to levels above 11%;
addition of 8% or higher amounts of nickel
2. Invention
Robert Bunsen discovered chromium's resistance to strong acids. The
corrosion resistance of iron-chromium alloys may have been first
recognized in 1821 by Pierre Berthier, who noted their resistance
against attack by some acids and suggested their use in cutlery.
In the early 1800s, James Stodart, Michael Faraday, and Robert
Mallet observed the resistance of chromium-iron alloys ("chromium
steels") to oxidizing agents.
The invention of stainless steel followed a series of scientific
developments, starting in 1798 when chromium was first shown to the
French Academy by Louis Vauquelin.
3. Austenitic Stainless Steel
Austenitic stainless steel is the largest category of stainless
steels, making up about two-thirds of total stainless steel
production. They possess an austenitic microstructure, a
face-centered cubic crystal structure.
This micro-structure is comprehended by alloying steel with
sufficient nickel or manganese and nitrogen to maintain an
austenitic microstructure at all temperatures, ranging from the
cryogenic region to the melting point. Thus, austenitic stainless
steels are none hardenable by heat treatment since they possess the
same microstructure at all temperature environments.
