Optimization of Analytical Condition for Reliable and Accurate Measurement of Carbon Concentration in Carburized Steel by EPMA

Gi-Hoon Kwon; Hyunjun Park; Byoungho Choi; Young-Kook Lee; Kyoungil Moon

doi:10.3740/MRSK.2023.33.3.106

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2023 Vol.33, Issue 3 Preview Page

Research Paper

Optimization of Analytical Condition for Reliable and Accurate Measurement of Carbon Concentration in Carburized Steel by EPMA EPMA를 이용한 침탄강의 정확하고 신뢰성 있는 탄소농도 측정을 위한 분석조건 최적화

27 March 2023. pp. 106-114

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Abstract

The carbon concentration in the carburized steels was measured by electron probe microanalysis (EPMA) for a range of soluted carbon content in austenite from 0.1 to 1.2 wt%. This study demonstrates the problems in carbon quantitative analysis using the existing calibration curve derived from pure iron (0.008 wt%C) and graphite (99.98 wt%C) as standard specimens. In order to derive an improved calibration curve, carbon homogenization treatment was performed to produce a uniform Kα intensity in selected standard samples (AISI 8620, AISI 4140, AISI 1065, AISI 52100 steel). The trend of detection intensity was identified according to the analysis condition, such as accelerating voltage (10, 15, 30 keV), and beam current (20, 50 nA). The appropriate analysis conditions (15 keV, 20 nA) were derived. When the carbon concentration depth profile of the carburized specimen was measured for a short carburizing time using the improved calibration curve, it proved to be a more reliable and accurate analysis method compared to the conventional analysis method.

Keywords

carburized steel

electron probe microanalysis

calibration curve

carbon analysis

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Information

Publisher :Materials Research Society of Korea
Publisher(Ko) :한국재료학회
Journal Title :Korean Journal of Materials Research
Journal Title(Ko) :한국재료학회지
Volume : 33
No :3
Pages :106-114
Received Date : 2023-02-07
Revised Date : 2023-03-05
Accepted Date : 2023-03-06
DOI :https://doi.org/10.3740/MRSK.2023.33.3.106

Korean Journal of Materials Research ISSN:1225-0562(Print) 2287-7258(Online) 한국재료학회지

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