Analysis Method of Laser Induced Spectroscopy to Measure Carburized Layer of Steel Parts

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

Active Publication Date: 2016-06-22
NCS TESTING TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 of Laser Induced Spectroscopy to Measure Carburized Layer of Steel Parts
  • Analysis Method of Laser Induced Spectroscopy to Measure Carburized Layer of Steel Parts
  • Analysis Method of Laser Induced Spectroscopy to Measure Carburized Layer of Steel Parts

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 is a chemical method for analyzing the depth distribution of carbon concentration and the depth of the carburized layer in the carburized layer of steel parts. Laser-induced spectroscopy analyzes the distribution of carbon concentration on the profile of the carburized layer to test the effect of carburizing heat treatment on steel parts. The analysis process is as follows: take the cross-section sample from the carburized test part, and mount and grind the cross-section sample; perform line scan analysis on the contour line perpendicular to the carburized surface under the optimal instrument parameter conditions; based on the calibration curve Calculate the carbon concentration at each point, determine the depth value of each point according to the curve change characteristics and test parameters, and obtain the carbon concentration depth distribution and depth value in the carburized layer. Compared with existing chemical analysis methods, this method is not limited by the shape and specifications of parts. Analysis samples are easy to prepare and can quickly, directly and accurately measure the distribution of carbon in the carburized layer and the depth of the carburized layer, especially for complex samples. Shape parts for quick analysis.

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 Patents(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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