Stainless steel nitride technology

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Stainless steel nitrided to increase its hardness and improve its abrasion resistance and resistance to erosion. The nitriding treatment usually ferritic, martensitic and austenitic stainless steel and heat-resistant steel. The high-speed steel should be carried out low-temperature short-time nitri ded.Sanitary pipe fittings
Stainless steel nitrided lies in the removal of the passivation film, the passivation film is stainless steel to rust and the reason can not nitrided, so to make stainless steel nitrided, the key is the removal of the surface of the passivation film. The method of removal of the passivation film has a chemical and a mechanical method,
(1) sandblasting. Workpiece before nitriding with fine sand blast treatment under a pressure of 0.15-0.25MPa, until the surface was dark gray, clear immediately after the surface of dust into th e furnace.
(2) phosphide. Nitriding of the workpiece before the phosphating treatment can damage the metal surface of the oxide film, forming a porous loose phosphide layer, and is conducive to the infiltration of a nitrogen atom,
(3) chloride foam. Blasting or the finishing of the workpiece chloride foam or coating, can effectively remove the oxide film. Common the chlorides have TiCl2 and TiCl3.
The nitriding treatment usually ferritic, martensitic and austenitic stainless steel and heat-resistant steel.Pipe Fittings
The chemical method the workpiece is soaked in 50% (by volume) of hydrochloric acid (temperature 70 degrees), and then water cleaned.steel pipe fittings