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Method for developing austenite grain boundary of sulfur free-machining steel through electrolytic corrosion

A technology of austenite grain boundary and electrolytic corrosion, which is used in material analysis by optical means, preparation of test samples, measurement devices, etc. The implementation process is smooth and safe, easy to control, and easy to operate.

Inactive Publication Date: 2018-03-30
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the existing technical problems, the present invention provides an imaging method for electrolytically corroding the austenite grain boundary of chalcogenide free-cutting steel, which solves the problems that the original sulfide morphology and phenomenon are not clear in the prior art

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  • Method for developing austenite grain boundary of sulfur free-machining steel through electrolytic corrosion
  • Method for developing austenite grain boundary of sulfur free-machining steel through electrolytic corrosion
  • Method for developing austenite grain boundary of sulfur free-machining steel through electrolytic corrosion

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Embodiment 1

[0037] Such as figure 1 Shown: Adopt the technical scheme of the development method of the austenite grain boundary of sulfur-based free-cutting steel through electrolytic corrosion of the present invention, carry out electrolytic corrosion on the austenite grain boundary of Y08MnS sulfur-containing free-cutting steel, and observe the grain boundary , the specific implementation steps are as follows:

[0038] S1. Sample preparation: cutting and grinding sulfur-based free-cutting steel into a steel sample, cutting and grinding at least one surface of the steel sample into a smooth and scratch-free grinding surface;

[0039] Preferably, the cut steel sample in S1 is embedded in the anti-corrosion material, and the side for electrolytic corrosion is exposed.

[0040] In detail, firstly, the sulfur-based free-cutting steel is cut to an appropriate size, and then the cut steel sample 3 is embedded in a corrosion-resistant material, which can not only fix the steel sample 3, but al...

Embodiment 2

[0064] Such as figure 1 Shown: Adopt the technical scheme of the development method of the austenite grain boundary of sulfur-based free-cutting steel through electrolytic corrosion of the present invention, carry out electrolytic corrosion on the austenite grain boundary of Y08MnS sulfur-containing free-cutting steel, and observe the grain boundary , the specific implementation steps are as follows:

[0065] S1. Sample preparation: cutting and grinding sulfur-based free-cutting steel into a steel sample, cutting and grinding at least one surface of the steel sample into a smooth and scratch-free grinding surface;

[0066] Preferably, the cut steel sample in S1 is embedded in the anti-corrosion material, and the side for electrolytic corrosion is exposed.

[0067] In detail, firstly, the sulfur-based free-cutting steel is cut to an appropriate size, and then the cut steel sample 3 is embedded in a corrosion-resistant material, which can not only fix the steel sample 3, but al...

Embodiment 3

[0091] Such as figure 1 Shown: Adopt the technical scheme of the development method of the austenite grain boundary of sulfur-based free-cutting steel through electrolytic corrosion of the present invention, carry out electrolytic corrosion on the austenite grain boundary of Y08MnS sulfur-containing free-cutting steel, and observe the grain boundary , the specific implementation steps are as follows:

[0092] S1. Sample preparation: cutting and grinding sulfur-based free-cutting steel into a steel sample, cutting and grinding at least one surface of the steel sample into a smooth and scratch-free grinding surface;

[0093] Preferably, the cut steel sample in S1 is embedded in the anti-corrosion material, and the side for electrolytic corrosion is exposed.

[0094] In detail, firstly, the sulfur-based free-cutting steel is cut to an appropriate size, and then the cut steel sample 3 is embedded in a corrosion-resistant material, which can not only fix the steel sample 3, but al...

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Abstract

The invention belongs to the technical fields of metallographic preparation and nonmetal inclusion control, and especially relates to a method for developing the austenite grain boundary of sulfur free-machining steel through electrolytic corrosion. The method comprises the following steps: S1, preparing a sample; S2, preparing an electrolyte; S3, performing the electrolytic corrosion; S4, treating a steel sample; and S5, carrying out metallographic observation. The method for developing the austenite grain boundary of sulfur free-machining steel through electrolytic corrosion allows the austenite grain boundary of the sulfur free-machining steel to be clearly displayed, the sulfur free-machining steel also contains manganese sulfide, the method does not damages the original morphology ofthe manganese sulfide in the electrolytic corrosion process, and the enforcement process of the method is stable and safe, is simple to operate, and can be easily controlled.

Description

technical field [0001] The invention belongs to the technical field of metallographic preparation and control of non-metallic inclusions, and in particular relates to an imaging method for electrolytically corroding austenite grain boundaries of chalcogenide free-cutting steel. Background technique [0002] Free-cutting steel is to reduce cutting resistance, improve cutting performance, and finally improve machining accuracy and surface quality, reduce processing costs, and improve Steel grades with high processing efficiency. Since it appeared in the United States in the 1920s, it has been widely used in industries such as the automobile industry, precision instruments and household appliances. Sulfur-based free-cutting steel has the advantages of low cost, large consumption, and wide application, accounting for 70% of the world's free-cutting steel production and more than 90% of China's free-cutting steel production. [0003] The cutting performance of sulfur-based free...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/32G01N21/84
CPCG01N1/32G01N21/84
Inventor 闵义张庆松华瑶许海生刘承军姜茂军
Owner NORTHEASTERN UNIV
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