Detailed Explanation of High-Temperature Flexural Testing Machine Testing Methods and Key Operation Points

In the fields of materials science, ceramics industry, and refractory materials research and development, the high-temperature flexural testing machine is an important tool for evaluating the bending performance of materials in high-temperature environments. The following is a detailed analysis of the testing methods of the machine and the key points during the operation process. 1. Purpose and Principle of the Test The testing machine is mainly used to determine the flexural strength of materials in a high-temperature state, that is, the ability of materials to resist bending deformation without breaking at high temperatures. The basic principle is to apply external force to cause the sample to bend until it breaks, thus calculating the flexural strength of the material. This indicator is significant for assessing the high-temperature stability, thermal shock resistance, and service life of materials. 2. Test Preparation 1. Sample Preparation: Prepare samples that meet specifications according to testing standards or requirements. The samples should be representative, with a smooth surface, free of cracks and obvious defects. Additionally, the samples need to be pre-treated, such as drying and cleaning, to ensure the accuracy of test results. 2. Equipment Inspection: Before the test, a comprehensive inspection of the high-temperature flexural testing machine should be conducted, including the heating system, loading system, measurement system, and control system. Ensure that the equipment is in good condition, all components are securely connected, and there are no abnormal phenomena. 3. Parameter Settings: Set the heating temperature, loading speed, measurement range, and other parameters of the testing machine according to the test requirements. At the same time, choose an appropriate support method and span to ensure that the sample is subjected to uniform stress during the test. 3. Testing Steps 1. Sample Loading and Heating: Place the prepared sample on the support device of the testing machine, adjusting its position to align with the loading device. Then, start the heating system to heat the sample to the predetermined temperature and maintain it for a period to ensure uniform temperature inside and outside the sample. 2. Loading and Measurement: Once the sample reaches the predetermined temperature, start the loading system to apply pressure to the sample at a constant speed, causing it to bend. During the loading process, record the deformation amount, load size, and temperature data in real-time. 3. Observation and Recording: During the test, closely observe the deformation of the sample, noting whether any cracks occur or expand. At the same time, record the fracture load, fracture location, and fracture characteristics of the sample. 4. Data Processing and Analysis: After the test, calculate the flexural strength, elastic modulus, and other mechanical performance indicators of the sample based on the recorded data. By comparing the test results of different samples, analyze the high-temperature flexural performance of the materials and its influencing factors. 4. Key Operation Points and Precautions 1. Safety First: During the test, strictly follow safety operating procedures, wear protective equipment, and avoid burns from high temperatures or mechanical injuries. 2. Temperature Control: During heating, strictly control the temperature to avoid adverse effects on the sample from being too high or too low. Maintain a stable temperature to ensure the accuracy of test results. 3. Loading Speed: The loading speed should be moderate; too fast may cause the sample to break due to impact, while too slow may cause the sample to soften from prolonged exposure to high temperatures. 4. Data Recording: Accurately record all data during the test, including the deformation amount, load size, temperature, etc. This data is the basis for subsequent analysis. 5. Equipment Maintenance: Regularly maintain and service the testing machine, such as cleaning the equipment, checking fasteners, and lubricating moving parts, to ensure normal operation and extend the service life of the equipment. The testing methods of the high-temperature flexural testing machine involve multiple links and key points. By correctly operating and maintaining the equipment, it is possible to accurately assess the high-temperature flexural performance of materials, providing strong support for material research and development, production, and application.

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