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Composite carburizing agent, carburizing method for detecting austenite grain size and detection method of austenite grain size

A technology of austenite grains and detection methods, which is applied in the direction of testing crystals, measuring devices, coatings, etc., can solve the problems of surface oxidation and long detection time, and achieve the effect of saving cost and saving time for carburizing and holding time.

Active Publication Date: 2020-01-03
SGIS SONGSHAN CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the embodiment of the present application is to provide a composite carburizing agent, a carburizing method for detecting austenite grain size and a detection method for austenite grain size, which aims to improve the existing austenite grain size During the particle detection process, the surface oxidation is serious or the detection time is too long

Method used

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  • Composite carburizing agent, carburizing method for detecting austenite grain size and detection method of austenite grain size
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  • Composite carburizing agent, carburizing method for detecting austenite grain size and detection method of austenite grain size

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Embodiment 1

[0089] This embodiment provides a composite carburizing agent. The composite carburizing agent includes a first carburizing agent with a particle size of 1.0-3.0 mm and a second carburizing agent with a particle size of 5.0-8.0 mm. Wherein, the mass percentage of the first carburizing agent is 30%, and the mass percentage of the second carburizing agent is 70%.

Embodiment 2

[0091] This embodiment provides a composite carburizing agent, which includes a first carburizing agent with a particle size of 1.0 to 3.0 mm and a second carburizing agent with a particle size of 5.0 to 8.0 mm; wherein, the first carburizing agent The mass percent of the carburizing agent is 27%, and the mass percent of the second carburizing agent is 73%.

Embodiment 3

[0093] This embodiment provides a composite carburizing agent, which includes a first carburizing agent with a particle size of 1.0 to 3.0 mm and a second carburizing agent with a particle size of 5.0 to 8.0 mm; wherein, the first carburizing agent The mass percent of the carburizing agent is 28%, and the mass percent of the second carburizing agent is 72%.

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Abstract

The invention relates to the field of steel heat treatment, in particular to a composite carburizing agent, a carburizing method for detecting the austenite grain size and a detection method of the austenite grain size. The composite carburizing agent is prepared from a first carburizing agent with the grain size of 1.0 mm-3.0 mm and a second carburizing agent with the grain size of 5.0 mm-8.0 mm.The mass percent of the first carburizing agent is 27%-33%. In the carburizing process of the composite carburizing agent, through mutual penetrating and inserting of the second carburizing agent andthe first carburizing agent with different grain sizes, gaps are filled mutually, a proper amount of oxygen seeps, reaction formation of active carbon atoms is guaranteed, a uniform and stable carburizing atmosphere is formed, a uniform carburizing layer with the thickness reaching the standard is formed on the surface of a test sample, and meanwhile the problem of serious oxidation caused by excessive oxygen is avoided.

Description

technical field [0001] The present application relates to the field of steel heat treatment, in particular to a composite carburizing agent, a carburizing method for detecting austenite grain size and a detection method for austenite grain size. Background technique [0002] Austenite grains are the grains obtained when steel is austenitized, and the grain size at this time is called austenite grain size, which is used to characterize the tendency of austenite grains to grow when steel is heated. One of the methods for detecting austenite grains is carburizing. [0003] In the prior art, the temperature of carburizing is low and the holding time is long. Long holding time will lead to serious surface oxidation, and even in the later stage of carburizing, the oxidation speed is close to the infiltration speed, resulting in the formation of a carburized layer that is too thin to be detected. . If the carburizing temperature is only increased, the surface oxidation of the sam...

Claims

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Application Information

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IPC IPC(8): C23C8/66G01N21/84
CPCC23C8/66G01N21/84G01N2021/8477
Inventor 刘年富岳峰吴学兴王银国
Owner SGIS SONGSHAN CO LTD
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