Carburizing reinforced isothermal quenching workpiece and processing method thereof

Abstract

The invention relates to a carburizing reinforced isothermal quenching workpiece and a processing method of the workpiece; the carburizing reinforced isothermal quenching workpiece sequentially comprises a substrate and a carburized layer from the core part to the outside; the substrate comprises ferrite; the carburized layer comprises a transition layer connected with the substrate, and a surface layer which is connected with the transition layer and is arranged on the surface; the transition layer comprises ferrite, and the surface layer comprises retained austenite, so that the later reshaping can be more easily and suitably carried out, and the service life is prolonged; the method is mainly used for directly optimizing the technological isothermal quenching without tempering after carburization so as to obtain lower bainite structure at the carburized layer and improve the surface performance of the workpiece; and furthermore, the needed processing time is saved, and the production efficiency is improved.

Description

technical field [0001] The invention relates to a carburized and strengthened workpiece and a processing method, in particular to a carburized and strengthened austempering workpiece and a processing method. Background technique [0002] In order to improve the surface performance of the workpiece, the workpiece is often carburized. Carburizing is a kind of metal surface treatment. Carburizing is mostly low-carbon steel or low-alloy steel. The specific method is to place the workpiece into an active In the carburizing medium, after heating to a certain temperature and holding for a sufficient time, the activated carbon atoms decomposed in the carburizing medium penetrate into the surface layer of the steel part, thereby obtaining high carbon in the surface layer, while the core part still maintains the original composition. [0003] However, in practical applications, for some workpieces with high requirements on appearance and mechanical properties and relatively thin thick...

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Problems solved by technology

[0003] However, in practical applications, for some workpieces with high requirements on appearance and mechanical properties and relatively thin thickness, it is often difficult to control the deformation of the workpiece when using the original general carburizing, quenching, and tempering processes, and its Poor toughness and fatigue strength, resulting in the performance of the workpiece cannot meet the needs of later plastic surgery

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