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  2. GB/T 17360-2020 in English
GB/T 17360-2020 in English

GB/T 17360-2020 in English

VALID

Microbeam analysis- Method of quantitative determination for low contents of silicon and manganese in steels using electron probe microanalyzer

  • Issued on:2020-06-02
  • Implemented on:2021-04-01
  • File Format:PDF
  • Delivery:Via email within 1~3 business days
Price(USD)： $220.00
$214.00
Standard No: GB/T 17360-2020
Document status: VALID
Title in English: Microbeam analysis- Method of quantitative determination for low contents of silicon and manganese in steels using electron probe microanalyzer
Title in Chinese: 微束分析 钢中低含量硅、锰的电子探针定量分析方法
Language: English
File Format: Electronic (PDF)
Delivery: Via email within 1~3 business days
Issued on: 2020-06-02
Implemented on: 2021-04-01
Superseding: GB/T 17360-2008 Quantitative analysis method of low content Si and Mn in steel with electron probe microanalysis
Professional Classification: GB-National Standard
Related Keywords: calibration curve method
analysis- method
traditional matrix correction method
electron probe microanalyzer introduction analysis
electron probe
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gb 17360

《GB/T 17360-2020微束分析 钢中低含量硅、锰的电子探针定量分析方法》由TC38（全国微束分析标准化技术委员会）归口，主管部门为国家标准化管理委员会。


Introduction

Analysis of the core content of the standard

This standard specifies the calibration curve method for determining the silicon (0.18%-5%) and manganese (0.18%-5%) content in steel using electron probe spectrometer, focusing on solving the limitations of the traditional matrix correction method in low-content analysis:

Technical elements 2008 edition 2020 edition improvement
Terminology "Calibration curve method" "Calibration curve method"
Correlation coefficient requirements R≥0.98 R≥0.99
Uncertainty assessment Not included New complete evaluation system

Key technology implementation points

1. Instrument configuration requirements

An electron probe or scanning electron microscope spectroscopy system equipped with a pulse height analyzer must be used. Energy spectrometer is not applicable. Recommended configuration:

  • Silicon analysis: TAP/PET crystal, 15-20kV accelerating voltage
  • Manganese analysis: LiF crystal, 20-25kV accelerating voltage

2. Reference material selection

Must meet the requirements of GB/T 4930, special attention:

Case: When analyzing alloy steel containing Cr, the reference material should contain an equal amount of Cr element to avoid spectral line interference

Measurement uncertainty control

Main sources of uncertainty and control measures:

Influencing factors Contribution Solution
Counting statistical error 45%-60% Guaranteed characteristic peak counts>5000
Background correction 15%-25% Use bilateral linear interpolation
Amplitude drift effect 10%-15% Control count rate<20000cps

Standard application suggestions

  1. It is recommended to use 6-8 reference material points when creating a new calibration curve
  2. When analyzing manganese, special attention should be paid to the fluorescence effect of the iron Kβ line (0.1757nm) on the manganese Kα
  3. Regularly verify the stability of the instrument with pure element standards

Typical application: A laboratory used this standard to determine 0.35% Si in electrical steel, with an expanded uncertainty of 0.008% (k=2)

More samples: DL/T 5154-2012 GB 18306-2015 GB 50021-2001(2009)
Sample only — not a preview of GB/T 17360-2020
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