Cutting pick and preparation method thereof

Abstract

The invention provides a cutting pick and a preparation method thereof and belongs to the field of part manufacturing. According to the cutting pick, a to-be-welded workpiece is heated and welded by comprehensively utilizing a skin effect, a proximity effect and annular effect in welding by means of medium frequency induction heating, so that the mechanical property of a weld joint is substantially equal to that of a cutting pick body. In the welding process, the preparation method has the characteristics of being capable of controlling the upsetting temperature precisely and eliminating interference of human factors to the welding quality to the maximum extent and being high in stability. Meanwhile, casting flaws and flash welding grey-spots are avoided during welding, so that the heatingefficiency is high. Medium frequency induction heating quenching has the advantages of being high in temperature control precision, uniform in hardened layer, relatively high in hardness, high in heating speed, high in production efficiency, little in oxidization and decarburization, pollution-free, low in energy consumption, low in cost and the like.

Description

technical field [0001] The invention relates to the technical field of component manufacturing, in particular to a pick and a preparation method thereof. Background technique [0002] Picks are key components of construction machinery used in fields such as mineral mining, roadway excavation, road construction and maintenance. They are responsible for excavation and planing, and are components that directly contact the object to be constructed. They are subjected to severe impacts, wear, etc. Working conditions, therefore, picks are also vulnerable parts. The performance and service life of such components directly affect the progress and cost of projects in fields such as mineral mining, roadway excavation, road construction and maintenance. [0003] The production process of picks generally includes hot forging, machining, brazing, heat treatment, shot peening, quality inspection and other processes. In the part of heat treatment process, the complexity partly determines ...

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Problems solved by technology

[0004] In recent years, there have been many related studies, but there is still the problem of poor wear resistance. For example, Chinese patent 200710156941.4 discloses the use of carbon powder to carburize, boronize, molybdenum, and chromium on the pick, and then perform salt bath and annealing. , Tempering treatment, the steps are complicated, the penetration rate of the solid penetration agent is slow and the penetration layer structure is uneven, so that the surface hardness of the product is not high and the quality is unstable; Chinese patent 200810123512.1 discloses that by pickling, carburizing, titanium, manganese Treatment, boronizing, tungsten, chromium salt bath, annealing treatment, tempering treatment, shot blasting treatment and other steps, the process is relatively complicated, the equipment cost of metal salt bath is high, the operation is complicated, and the effect of alloying is limited; Chinese patent 201510965644.9 discloses the use of kerosene as a carburizing medium to improve the carburizing process, but in this patent, the cooled pick after brazing is reheated for carburizing, and the pick is heated twice at high temperature, which increases the complexity of the process Moreover, after the carburizing process, a medium temperature tempering of about 400 ° C was carried out, resulting in a decrease in the hardness of the carburized layer and a decrease in wear resistance.

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