Metallic phase automatic detection method for stainless steel casting blank foreign matter

An automatic detection and inclusion technology, applied in measuring devices, optical testing flaws/defects, instruments, etc., can solve problems such as large errors, lack of identification of inclusions in slabs, etc., achieving high speed, simple and practical methods, and relative errors. reduced effect

Inactive Publication Date: 2009-04-08
SHANXI TAIGANG STAINLESS STEEL CO LTD
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Problems solved by technology

However, these standards do not provide a method for identifying slab inclusi

Method used

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  • Metallic phase automatic detection method for stainless steel casting blank foreign matter
  • Metallic phase automatic detection method for stainless steel casting blank foreign matter
  • Metallic phase automatic detection method for stainless steel casting blank foreign matter

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Embodiment Construction

[0025] In this project, one steel type is analyzed in each of the four major types of stainless steel, austenitic, ferritic, martensite, and austenitic-ferritic. These four steel types are: 0Cr18Ni9(304), 0Cr13Al (405), 3Cr13 (420), 00Cr22Ni5Mo3N (2205). The desulfurization products of these steel grades are relatively simple, mainly manganese sulfide, and sulfide is occasionally found in the oxide. In the deoxidation stage, silicon, aluminum, calcium and mixed elements are used for deoxidation, and there are many types of oxides, which can be mainly divided into six types, which are: calcium silicate, aluminum silicate, calcium aluminate, oxide Aluminum, silica, composite inclusions. Due to the adoption of various processes for deoxidation, these inclusions basically represent the oxide inclusions of various stainless steels. Experimental research shows that several types of oxide inclusions are difficult to distinguish in terms of gray value, roundness, smoothness, and asp...

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Abstract

The invention discloses a stainless steel casting inclusions metallography automatic detection method aims to be simple, practical and to be provided with the comparative small error. The invention firstly makes samples and then adopts a horizontalizer to press the sample into horizontal form; then the sample is arranged on an automatic carrier; the microscope is adopted to observe the sample; the CCD is adopted to shoot the inclusions image into the image frame of an inclusion analysis software; after the image is regulated well the standard ASTM E1245 adopted by the automatic image analysis to measure the inclusions quantity in steel and other metals is adopted to set the characteristic value of the inclusions; the characteristic values of the inclusions of sulfide and oxide are also set; and the inclusion analysis software is adopted to detect the inclusions in the sample and the detection results are output in a report form.

Description

technical field [0001] The invention relates to a method for automatic metallographic detection of stainless steel slab inclusions. Background technique [0002] There is no method or standard for metallographic automatic detection and analysis of slab inclusions at home and abroad. At present, automatic image analysis software is mostly used to detect and study slab inclusions. Internationally, these softwares are developed based on the standards of inclusion detection in various countries. The most complete standard for automatic detection of inclusions is the standard E1245 issued by the American Society for Materials ASTM, which uses automatic image analysis to determine the number of inclusions in steel and other metals; my country revised and adopted ASTM E1245 in 2002 to formulate GB / T18876.1, It is the same as ASTM E1245 in the main testing methods and testing objects. The similar standards of other countries in the world are similar. However, these standards do no...

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Application Information

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IPC IPC(8): G01N13/10G01N21/84G01N21/94
Inventor 裴海祥王烽袁刚
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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