Auxiliary equipment and method for improving ion nitriding efficiency of surface of low-alloy structural steel

Abstract

The invention provides auxiliary equipment and method for improving the ion nitriding efficiency of the surface of low-alloy structural steel, and belongs to the technical field of the ion nitriding treatment of the surfaces of metal materials. The auxiliary equipment comprises an insulating base, and a cylindrical structure surrounded by a plurality of cathode circular tubes and anode bars is inserted into the insulating base; the cathode circular tubes are hollow cylinders, and through holes which are uniformly distributed are formed in the wall of each cylinder; the anode bars are solid barmaterials, and every two cathode circular tubes are arranged in the middles of every two anode rods; and the anode bars are connected with the positive pole of a power supply through wires, and the cathode circular tubes are connected with the negative pole of the power supply through wires. Compared with the prior art, the method is characterized in that argon is introduced before low temperature, and when the temperature in the furnace rises to 480 DEG C, the introduced argon is changed into hydrogen and nitrogen with the flow ratio of 1:3. According to the method, a compound layer and a diffusion layer which are thicker and are located on the surface of the low-alloy structural steel can be obtained in a short time, so that the performances such as the hardness, the wear resistance andthe like of the low-alloy structural steel are improved.

Description

technical field [0001] The invention belongs to the technical field of ion nitriding treatment on the surface of metal materials, and in particular relates to an auxiliary device and a method for improving the efficiency of ion nitriding on the surface of low-alloy structural steel. Background technique [0002] Ion nitriding technology is under low pressure conditions, using the nitriding furnace as the anode and the workpiece to be nitrided as the cathode, applying high voltage between the cathode and anode, so that the thin nitrogen-containing gas between the cathode and anode is ionized, and obtained after ionization The ion acceleration motion bombards the cathode workpiece, the kinetic energy of the ion is converted into the internal energy of the workpiece during the bombardment process, and the workpiece is heated while nitriding is carried out by sputtering deposition or other principles. [0003] After the above-mentioned ion nitriding treatment, a compound layer a...

AI Technical Summary

Problems solved by technology

This method has better improved the shortcomings of overburning, pitting and edge effects caused by direct bombardment of the workpiece in the traditional nitriding technology, but it still belongs to the traditional glow discharge and has the problem of low nitriding efficiency. It can only be used in the laboratory, it is difficult to promote this technology to enterprises, and further research is needed

Images