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Decarburization inspection of steel

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Decarburization inspection of steel

Release date:2019-03-05 Author: Click:

Decarburization test of steel in wuxi forgings

Steel in the process of heating and heat preservation, the surface of steel by the effect of the surrounding atmosphere of oxidation, the loss of all or part of the carbon content, which makes the steel surface carbon content lower phenomenon known as decarbonization. The area causing the reduction of carbon content on the steel surface is called decarbonization layer, and the depth of surface carbon content is called decarbonization layer depth.

Decarbonization layer is divided into full decarbonization layer and partial decarbonization layer. The total depth of decarbonization layer is the sum of total decarbonization layer and partial decarbonization layer.

The decarburization of steel directly affects the properties of materials, resulting in lower surface hardness and poorer wear resistance. At the same time, it also results in different surface and core structure of forgings, resulting in quenching cracks.

The depth test of the decarburized layer of steel is evaluated by the standards of the depth test of the decarburized layer of steel and the depth test of the decarburized layer of steel.

The standard stipulates that the depth of decarbonizing layer of steel shall be determined by metallographic method, hardness hair method and carbon content determination method. The selection and precision of the method depend on the degree of decarburization, microstructure, carbon content and shape of forging.

Each kind of determination method has its application scope, which kind of determination method chooses, is fixed by the related technical condition or the bilateral agreement, USES the metallographic method when there is no definite stipulation.


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