Nitriding salt for low-temperature salt-bath nitriding

Abstract

The invention discloses a nitriding salt for low-temperature salt-bath nitriding, which comprises the following components in percentage by weight: 45 to 55 percent of CO(NH2)2, 5 to 15 percent of K2CO3, 3 to 15 percent of Na2CO3, 3 to 15 percent of Li2CO3, 5 to 15 percent of NaCl and 5 to 15 percent of KCl. When the nitriding salt is used, the temperature for common salt-bath nitriding is lowered, and the use temperature range of the conventional nitriding salts is raised. In addition, the nitriding salt also has the advantages that: the deformation of a process workpiece is small; the equipment is simple; environment-friendly operation is realized; and the like.

Description

technical field [0001] The invention relates to a nitride salt used in a low-temperature salt bath nitriding process. Background technique [0002] The salt bath nitriding process technology is also called soft nitriding treatment technology, which uses the active nitrogen atoms generated by the decomposition of cyanate to penetrate into the workpiece, forming an iron compound layer and diffusion layer on the surface of the workpiece, thereby improving the wear resistance of iron-based materials resistance, corrosion resistance and fatigue strength. Therefore, salt bath nitriding has been widely used in production practice. However, the currently applied salt bath nitriding treatment technology has the following disadvantages: the applicable temperature of the nitriding base salt is relatively high, generally between 520 and 600°C, which is not suitable for low temperature treatment. Contents of the invention [0003] The purpose of the invention is to overcome the high ...

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Problems solved by technology

However, the current salt bath nitriding treatment technology has the following disadvantages: the nitriding base salt is su

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