Comparisons of Plasma Nitriding and Traditional Nitriding

- Jan 08, 2018-

Advantages of Plasma Nitriding Vs. Traditional Gas & Salt Bath Nitriding

Plasma nitriding imparts a hard wear resistant surface without brittleness, galling, or spalling. This eliminates costly cleaning or grinding to remove the brittle white layer associated with traditional nitriding.

A uniform glow discharge that envelops the entire surface achieves a consis- tent hardness and case depth. This is especially noticeable on complex ge- ometries where gas nitriding case depths can be non-uniform.

Plasma nitriding (H2+N2) least affects the surface finish of the product. Salt bath and gas nitriding, which uses ammonia (NH3) and phosphate for activa- tion , will roughen a ground or polished surface.

Plasma nitriding has a higher surface hardness and maintains your material's core properties due to the lower processing temperatures associated with plasma nitriding (900 - 950 Fahrenheit). Traditional nitriding operates at 975 -1075 Fahrenheit and can change the core properties of your material.

More materials can be selected for plasma nitriding, including cast iron, mild steel, mold, tool, high speed and stainless steels.

Plasma nitriding is environmentally friendly. Plasma nitriding uses non-toxic precisely controlled gas mixtures.

Advantages of Plasma Nitriding vs. Chrome Plating

Plasma nitriding imparts a hard wear resistant diffused layer to the surface without the problems encountered with most wet bath platings. Because plasma nitriding is a diffusion process it eliminates the problems of flaking, spalling, edge build-up, chipping and the cost associated with stripping and replating the products.

Cutting edges remain sharp during plasma nitriding and the uniform glow discharge enveloping all surfaces achieves a consistent hardness and case depth.

The build-up associated with chrome plating that causes the rounding of edges and webbing at the base of cavities is eliminated with plasma nitriding. In some cases, grinding is necessary to remove the excessive build-up leading to additional production costs.

The diffused case in ion nitriding provides good resistance to indentation which chromes plating does not offer. This allows plasma nitriding to be selected for a wider range of materials and applications.

Plasma nitriding will improve the fatigue strength of your material. Chrome plating does not offer this benefit.

Performance of plasma nitrided hydraulic shafts in Europe has satisfied the requirements for corrosion and wear-resistance vs. chrome.

Plasma nitriding is environmentally friendly. Plasma nitriding does not use any toxic substances. The chrome plating process uses hexavalent chrome which is a known carcinogen.

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