Method for preparing X-ray austenite measuring and caliberating sample

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...

Examples

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] Austenite volume fraction

10％

20％

30％

40％

50％

Implementation conditions

Put it into absolute alcohol and mix powder mechanically

Implementation results

Mix the two powders evenly

[0026] (3) Thermoforming

[0027] 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 figure 1 , f...

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...

Examples

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] Austenite volume fraction

10％

20％

30％

40％

50％

Implementation conditions

Put it into absolute alcohol and mix powder mechanically

Implementation results

Mix the two powders evenly

[0026] (3) Thermoforming

[0027] 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 figure 1 , f...

Images