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Analysis method for measuring steel part carburized layer by laser induction spectrum

A technology of laser induction and analysis method, which is applied in the direction of material excitation analysis, etc., to achieve the effect of easy processing, wide application range, and comprehensive analysis and evaluation

Active Publication Date: 2014-07-02
NCS TESTING TECH
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  • Claims
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Problems solved by technology

However, in the prior art, the analysis method of analyzing the carburized layer on the surface of iron and steel materials using laser-induced breakdown spectroscopy has not been reported so far.

Method used

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  • Analysis method for measuring steel part carburized layer by laser induction spectrum
  • Analysis method for measuring steel part carburized layer by laser induction spectrum
  • Analysis method for measuring steel part carburized layer by laser induction spectrum

Examples

Experimental program
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Effect test

Embodiment

[0042] Taking the carburized layer analysis of the helical tooth surface of the gear shaft after carburizing and quenching as an example, the specific analysis steps are as follows:

[0043] (a) Remove one of the helical teeth by electric spark cutting, and cut a section sample perpendicular to the meshing surface in the middle;

[0044] (b) The cross-section sample is inlaid by cold mounting method, and the inspection surface is ground and polished in the metallographic sample preparation equipment, rinsed with running tap water and alcohol in turn, and dried, then put the sample in the desiccator;

[0045](c) Adjust the laser-induced spectrometer to the best analysis state, adjust the position and angle of the sample, and conduct line-scanning analysis at the predetermined test position perpendicular to the surface. The scanning step of the stepping motor is 80 microns, and the total scanning length is 6mm. Simultaneously collect the signals of C and Fe elements during the p...

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Abstract

The invention provides a chemical method for analyzing carbon concentration depth distribution in a steel part carburized layer and the depth of the carburized layer. According to the chemical method, the distribution of the carbon concentration on a section of the carburized layer is analyzed by a laser induction spectrum to realize the checking on a carburizing heat treatment effect on a steel part. An analysis process comprises the following steps: taking a section sample on a testing part subjected to carburizing treatment and embedding and polishing the section sample; carrying out a linear scanning analysis on an outline line vertical to a carburized surface under an optimal instrument parameter condition; and calculating the carbon concentration of each point according to a correction curve and determining the depth value of each point according to curve change characteristics and testing parameters to obtain the carbon concentration depth distribution and the depth value in the carburized layer. Compared with an existing chemical analysis method, the method is not limited by shapes and specifications of the part; an analysis sample is easy to prepare and the distribution of carbon in the carburized layer and the depth of the carburized layer can be determined rapidly, directly and accurately; the chemical method is particularly used for rapidly analyzing the part with the complicated shape.

Description

technical field [0001] The invention belongs to the technical field of surface micro-area analysis in the field of material science, and provides an analysis method for analyzing a carburized layer on the surface of a steel material by using a laser-induced spectrometer. Background technique [0002] Carburizing of steel is a widely used surface modification process, which can increase the carbon content of the surface of the workpiece and form a certain carbon gradient on the surface of the workpiece, so that the surface of the workpiece can obtain high hardness, strength, wear resistance and The fatigue strength and carbon concentration distribution in the carburized layer have a great influence on the quality of carburized parts. At present, in the process test and production, the main detection methods for the carburized layer of steel parts are metallographic method, hardness method, fracture method, chemical analysis method and so on. [0003] Among them, the metallog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/63
CPCG01N21/718
Inventor 杨春贾云海陈吉文张勇
Owner NCS TESTING TECH
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