Ferritic nitrocarburizing

Carbonitriding introduces both carbon and nitrogen into the austenite of the steel. The process is similar to carburizing in that the austenite 

Type of metal Designation Nitrkling temperature Surface hardness, HR15N ly al case depth Compound zone thickiiess  

Ferritic nitrocarburizing is a subcritical heat treatment process, carried out by either gaseous or plasma techniques, and involves the diffusion of carbon and nitrogen into the ferritic phase. The process results in the formation of a thin white layer or compound layer, with an underlying diffusion zone of dissolved nitrogen in iron, or alloy nitrides (Ref 17). The white layer improves surface resistance to wear, and the diffusion zone increases the fatigue endurance limit, especially in carbon and low-alloy steels. Alloy steels, cast irons, and some stainless steels can be treated. The process is used to produce a thin, hard skin, usually less than 25 xm (1 mil) thick, on low-carbon steels in the form of sheet metal parts, powder metallurgy parts, small shaft sprockets, and so forth. 

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Ferritic Nitrocarburizing. This process is similar to carbonitriding, except that it is carried out in the temperature range of the stabiHty of ferrite and carbide (<723° C). Therefore hardening is not by martensite formation, but because of the formation of very hard carbonitrides. 

Austenitic Nitrocarburizing. This is similar to ferritic nitrocarburizing except that the temperature may extend into the austenite range. The case usually consists of hard carbonitride particles, and quenching to achieve hardening is not required. 

Carbonitriding Ferritic nitrocarburizing Diffusion (pyk cementation) chromizing Diffusion (pack cementation) aluminizing Diffusion (pack cementation) siliconizing Boronizing (bonding)... 

Compares the typical characteristics of carburizing, nitriding, carbonitriding, and ferritic nitrocarburizing... 

Ferritic nitrocarburizing Sputter coating Vy////A hhl n033 ranao... 

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