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Method for measuring content of trace hydrogen in low alloy steel

A low-alloy steel and hydrogen content technology, applied in the field of analysis and testing, can solve the problems of detecting trace hydrogen content in low-alloy steel, and achieve the effect of improving accuracy and accuracy

Inactive Publication Date: 2017-04-19
SHAANXI HONGYUAN AVIATION FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no specific standard for detecting trace hydrogen content in low alloy steel by this method
At the same time, after patent retrieval, there is no method to determine trace hydrogen in low alloy steel by using inert gas pulse heating-thermal conductivity method

Method used

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  • Method for measuring content of trace hydrogen in low alloy steel
  • Method for measuring content of trace hydrogen in low alloy steel
  • Method for measuring content of trace hydrogen in low alloy steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: Analysis of hydrogen content standard substance LECO502-457 in steel

[0031] Step 1: Preparation of test conditions

[0032] Sub-step 1.1: Instrument selection

[0033] It is determined that the hydrogen analyzer is a device for detecting trace hydrogen content in the standard substance LECO502-457. The setting parameters of the device are: degassing power 3900W, time: 60s, analysis power 2500W, minimum analysis time: 80s, degassing method: Double degassing, flow rate: 150ml / min, measurement pressure: 15psi, inlet pressure: 40psi.

[0034] Sub-step 1.2: Preparation of main reagents and materials:

[0035] Diethyl ether or acetone: analytically pure,

[0036] Standard substance of hydrogen content in steel:

[0037] American LECO501-529, hydrogen content: 0.00058% ± 0.00008%

[0038] American LECO502-457, hydrogen content: 0.00009% ± 0.00004%

[0039] Graphite crucible: spectrally pure, high temperature crucible;

[0040] Step 2: Preparation of Spec...

Embodiment 2

[0051] Embodiment 2: Analysis of hydrogen content in low alloy steel 18Cr2Ni4WA

[0052] Step 1: Preparation of test conditions

[0053] Sub-step 1.1: Instrument selection

[0054] It is determined that the hydrogen analyzer is a device for detecting trace hydrogen content in low alloy steel 18Cr2Ni4WA. The setting parameters of the device are: degassing power 3950W, time: 60s, analysis power 2550W, minimum analysis time: 80s, degassing method: double Degassing, flow rate: 150ml / min, measurement pressure: 15psi, inlet pressure: 40psi.

[0055] Sub-step 1.2: Preparation of main reagents and materials

[0056] Diethyl ether or acetone: analytically pure,

[0057] Standard substance of hydrogen content in steel:

[0058] American LECO501-529, hydrogen content: 0.00058% ± 0.00008%

[0059] American LECO502-457, hydrogen content: 0.00009% ± 0.00004%

[0060] Graphite crucible: spectrally pure, high temperature crucible;

[0061] Step 2: Preparation of Specimen

[0062] Afte...

Embodiment 3

[0072] Embodiment 3: Analysis of hydrogen content in low alloy steel 30CrMnSiNi2A

[0073] Step 1: Preparation of test conditions

[0074] Sub-step 1.1: Instrument selection

[0075] It is determined that the hydrogen analyzer is a device for detecting trace hydrogen content in low alloy steel 30CrMnSiNi2A. The setting parameters of the device are: degassing power 3800W, time: 60s, analysis power 2450W, minimum analysis time: 80s, degassing method: double Degassing, flow rate: 150ml / min, measurement pressure: 15psi, inlet pressure: 40psi.

[0076] Sub-step 1.2: Preparation of main reagents and materials

[0077] Diethyl ether or acetone: analytically pure,

[0078] Standard substance of hydrogen content in steel:

[0079] American LECO501-529, hydrogen content: 0.00058% ± 0.00008%

[0080] American LECO502-457, hydrogen content: 0.00009% ± 0.00004%

[0081] Graphite crucible: spectrally pure, high temperature crucible;

[0082] Step 2: Preparation of Specimen

[0083] ...

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Abstract

The invention relates to a method for measuring the content of trace hydrogen in low alloy steel. According to the method, a hydrogen analyzer is adopted, an inert gas pulse heating-thermal conductivity method is used to measure the content of trace hydrogen (less than 0.0002%) in low alloy steel, and the method comprises the following steps: preparing experiment conditions, preparing a sample, carrying out a blank experiment, calibrating a hydrogen analyzer, and measuring the hydrogen content of the sample. The provided method improves the accuracy of the measurement results and solves the problem that the content of trace hydrogen (less than 0.0002%) in low alloy steel is difficult to measure.

Description

technical field [0001] The invention belongs to the technical field of analysis and testing, and in particular relates to a method for measuring trace hydrogen content in low-alloy steel. Background technique [0002] Hydrogen is an unstable element in metals and is highly mobile. When a large amount of non-equilibrium hydrogen is introduced into the metal, cracks and defects will occur. The higher the strength of the steel, the more sensitive it is to hydrogen embrittlement. Therefore, many aviation products now have relatively strict requirements on the hydrogen content. Therefore, it is very important to accurately determine the trace hydrogen content in low alloy steel. The analysis of hydrogen content in general materials generally adopts inert gas pulse heating-thermal conduction method, which has the characteristics of simple operation, accuracy and speed. However, there is no specific standard for the detection of trace hydrogen content in low-alloy steels by this ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N7/16
Inventor 沈英姬吴锐红薛强冀胜利郑建新
Owner SHAANXI HONGYUAN AVIATION FORGING
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