Solid Rare Earth Nitriding Catalyst

Abstract

The invention is a solid rare earth nitriding infiltration accelerator, which is composed of the following ingredients uniformly mixed by weight percentage: 50-90% of rare earth chloride, 5-30% of ammonium chloride and 5-20% of urea. The rare earth permeation agent is a paste solid, packed in a wax-sealed carton with a plastic film, and then put into an iron can and put into a gas nitriding furnace together with the nitriding workpiece for use. The permeation accelerator of the invention has the advantages of simple preparation, convenient use, 30-60% increase in nitriding speed, energy saving, and increased workpiece surface hardness HV50-150.

Description

Technical field:

[0001] The invention relates to a solid rare earth nitriding catalyst. Background technique:

[0002] Nitriding is a common chemical heat treatment method for the surface of metal workpieces. At a certain temperature, active nitrogen atoms are infiltrated into the surface of metal workpieces to form a compound layer, which changes the phase structure of the surface of metal workpieces, thereby improving the mechanical properties of the surface of metal workpieces, corrosion resistance, Obtain good wear resistance, fatigue resistance. However, in the conventional gas nitriding process, there are problems and defects such as long time, low efficacy, large power consumption, and large exhaust gas emissions. Many heat treatment professionals are working hard to find new ways to overcome the shortcomings of the nitriding process. Harbin Institute of Technology's new invention "Application Method of Rare Earth in Gas Nitriding and Carbonitriding Process" Patent ...

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