Detecting the creep rate of tungsten wire at high temperature usually follows specific test methods and standards, such as GB/T 4194-2017 “Tungsten Wire Creep Test, High Temperature Treatment and Metallographic Inspection Method”. The following are the general steps for detecting the creep rate of tungsten wire at high temperature:
- Test preparation
Specimen preparation:
Select tungsten wire that meets the standard as the specimen to ensure that its diameter, length and surface quality meet the test requirements.
Cut the specimen into appropriate lengths and process it into the required shape (such as making small hooks at both ends).
Equipment preparation:
Prepare a high-temperature creep tester that can accurately control temperature and apply constant load.
Prepare other necessary auxiliary equipment, such as heating devices, vacuum systems, measuring tools, etc.
- Test steps
Install the specimen:
Install the specimen in the fixture of the high-temperature creep tester to ensure that both ends of the specimen are firmly fixed and in a horizontal state.
Adjust the parameters of the testing machine, such as temperature, load, etc., to meet the test requirements.
Heating and vacuuming:
Start the heating device to heat the sample to a predetermined high temperature environment.
At the same time, start the vacuum system to vacuum the inside of the testing machine to eliminate the influence of air on the test results.
Applying load:
Apply a constant load to the sample, usually through the loading system of the testing machine.
Record the size of the load and the time of application to ensure the accuracy and repeatability of the test.
Observation and recording:
During the test, observe the deformation of the sample regularly and record the relevant data.
Use the measuring tool to accurately measure the elongation of the sample to calculate the creep rate.
Data processing:
Calculate the creep rate based on the recorded elongation and time data. The creep rate is usually expressed as the ratio of the elongation of the sample per unit time to the original length.
Perform statistical analysis on the data to evaluate the creep performance of tungsten wire at high temperature.
3 Precautions
Temperature control: Ensure that the temperature during the test is stable and meets the standard requirements to avoid the influence of temperature fluctuations on the test results.
Load application: The size and application method of the load should be strictly in accordance with the standard to ensure the accuracy and reliability of the test.
Data recording: During the test, all relevant data, including temperature, load, elongation, etc., should be recorded in detail for subsequent data processing and analysis.
Safety protection: When conducting high temperature tests, necessary safety protection measures should be taken, such as wearing protective glasses, gloves, etc., to ensure the safety of operators.
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