Method for preparing X-ray austenite measuring and caliberating sample

An austenite and X-ray technology, which is applied in the field of material analysis and testing, can solve the problems of inconvenient quantitative analysis and measurement work and the inability to ensure the reliability of measurement results, etc., and achieve long-term stability of austenite content, beautiful surface, and not easy to rust Effect

Inactive Publication Date: 2009-06-03
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its disadvantages are: because the preparation method of this kind of calibration sample is too simple, and in the actual X-ray quantitative analysis process, it must be mixed into the sample to be tested, which brings inconvenience to the quantitative analysis and measurement work, and cannot ensure the measurement reliability of results

Method used

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  • Method for preparing X-ray austenite measuring and caliberating sample
  • Method for preparing X-ray austenite measuring and caliberating sample
  • Method for preparing X-ray austenite measuring and caliberating sample

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Experimental program
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Embodiment Construction

[0021] Provide following embodiment in conjunction with content of the present invention:

[0022] (1) Powder particle size screening

[0023] Select austenite powder and ferrite powder, use a sieve with an aperture of 5 μm to limit the maximum size of the powder, and use a sieve with an aperture of 2 μm to limit the minimum size of the powder, so that the obtained particle size distribution is controlled within the range of 2 μm to 5 μm.

[0024] (2) mixed powder

[0025] Put austenite powder and ferrite powder into absolute alcohol, and use mechanical means to mix the two powders evenly. The volume fraction of austenite is 10%, 20%, 30%, 40% and 50%, and a series of calibration samples with austenite content are obtained.

[0026]

[0027] (3) Thermoforming

[0028] At 800°C and 10 -3 In a Pa vacuum environment, the mixed powder undergoes a hot pressing process to obtain a bulk material with a porosity of less than 3%, and the two powders are well bonded. Such as fi...

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Abstract

The present invention relates to material analyzing and measuring technology. The preparation process of X-ray measuring and calibrating austenite sample includes the following steps: screening of austenite powder and ferrite powder; mixing austenite powder and ferrite powder in absolute alcohol in certain volume ratio mechanically; hot pressing the mixture powder into block material at high temperature and vacuum state; and machining calibrated sample with the block material and annealing in vacuum furnace. The measuring and calibrating austenite sample is used in calibrating X-ray diffraction system, and has its austenite content maintained stably for long period to ensure the reliable measurement result.

Description

technical field [0001] The invention relates to a method for preparing a calibration sample, in particular to a method for preparing a calibration sample for X-ray austenite measurement. It is used in the technical field of material analysis and testing. Background technique [0002] Before X-ray austenite measurement, the calibration sample with known austenite content should be tested first to check whether the instrument system is normal. Therefore, choosing a suitable calibration sample is very important to the whole measurement work. Austenite measurement belongs to X-ray quantitative analysis technology, including internal standard method, K value method and intensity factor method. The simple preparation method of X-ray austenite measurement calibration sample is to grind some standard materials into powder. So far, there is no mature method for preparing calibration samples for austenite measurement, which cannot ensure the reliability of X-ray austenite measuremen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28G01N23/20B22F3/00
Inventor 姜传海洪波余震
Owner SHANGHAI JIAO TONG UNIV
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