Oxidation-free brazing and heat treatment device for cemented carbide picks

Abstract

The invention provides a non-oxidation brazing and thermal treatment device of hard alloy cutting teeth, belongs to the technical field of cutting tools, and mainly solves the problems of the prior art of poor welding quality and thermal treatment effect. The non-oxidation brazing and thermal treatment device comprises a cryogenic box, a nitrogen transporting pipeline, a heating furnace, a quenching tank and a manipulator. The non-oxidation brazing and thermal treatment device is characterized in that the nitrogen transporting pipeline is arranged between the cryogenic box and a working bin, one part of the nitrogen transporting pipeline in the working bin is close to the top wall of the working bin, and oxidation discharge holes formed on the nitrogen transporting pipeline. The heating furnace, the quenching tank and the manipulator are located in the working bin of a sealed structure. A heating operation hole, a heating observation hole, a quenching operation hole and a quenching observation hole are formed at the top of the working bin. A waste gas discharge hole is formed on the lower portion of the working bin or on the side wall close to the bottom. A material inlet is formed on the side wall of one side of the working bin close to the heating furnace, a material outlet is arranged on the side wall of one side of the working bin close to the quenching tank, and a movable sealed device is arranged in the material outlet. The non-oxidation brazing and thermal treatment device reduces energy consumption and saves materials.

Description

technical field [0001] The invention belongs to the technical field of cutting tools, and in particular relates to an oxidation-free brazing and heat treatment device for hard alloy picks. Background technique [0002] The cutting tool of the construction machinery cutting tool - the quality of the pick is particularly important, which is directly related to the progress of the project, the completion of the output and the cost of the user. [0003] At present, there are basically two types of tooth production processes in the world, namely ①brazing cemented carbide, heating the welded cemented carbide with flame or intermediate frequency, cooling to room temperature and then loading the furnace for tooth body heat treatment. ② Brazing hard alloy and heat treatment are carried out at the same time, prefabricated hard alloy and solder in the hole of the tooth body welding part, heated to the welding temperature by the intermediate frequency induction heating furnace as a whol...

AI Technical Summary

Problems solved by technology

Both of the above two types of processes are welded in an oxidized state in the air. The former causes the brazing material to crack during the second heating due to the second heating, and the cemented carbide is easy to fall off during use.

The latter is that after the overall heating of the tooth body in an oxidized state, the surface of the workpiece will be oxidized and decarburized in the air, resulting in a large amount of oxide skin, which has a great impact on the welding and heat treatment of the pick: ①The welding strength is not high , it is easy to cause the cemented carbide to fall off during use, ②The effect of heat treatment is not good, it is easy to cause the surface hardness of the workpiece to decrease and the geometric size to shrink

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