Gd 121 Af 12 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.

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

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.

Ferritic Stainless Steels

Ferritic stainless steels possess a ferrite micro-structure like carbon steel, which is a body-centered cubic crystal structure, and contain between 10.6% and 27.2% chromium with very little or no nickel. They are magnetic.

This micro-structure is present at all temperatures due to the chromium addition, so they are not hardened by heat treatment. They cannot be strengthened by cold work to the same degree as austenitic stainless steels.