High-temperature creep refers to the phenomenon where materials slowly undergo plastic deformation over time under temperatures T ≥ (0.3–0.5)Tm (Tm is the melting point) and stresses much lower than their yield strength. It is used to evaluate creep properties and long-term strength of various metals and alloys under high-temperature conditions, measuring parameters such as creep limit and long-term strength limit. Depending on the applied stress method, it can be classified into high-temperature compressive creep, tensile creep, bending creep, and torsional creep. Compared to high-temperature strength, high-temperature creep more effectively predicts strain trends and fracture life of materials under prolonged high-temperature service, making it an important mechanical property closely related to material composition and structural characteristics.
Main features of the high-temperature creep testing machine:
1. The cylindrical high-temperature furnace has high working efficiency, up to dozens of times that of traditional split-type high-temperature furnaces. It allows sample replacement and repeated testing without cooling down, heating up, or insulation processes.
2. The electric system controls the vertical movement of the high-temperature furnace, while the linear guide ensures safety, stability, and concentricity between the sample and the furnace chamber.
3. Electric lifting cylindrical high-temperature furnace, operators do not need to come into contact with the furnace, significantly reducing labor intensity while ensuring safety and reliability;
4. The cylindrical high-temperature furnace offers excellent thermal insulation, a long uniform temperature zone (200 mm), and a maximum temperature of 1200°C. The electric furnace has a long service life, ensuring 30,000 hours of operation at temperatures up to 1200°C.
5. The cylindrical high-temperature furnace has excellent safety performance, operating on a low safety voltage (25V) with high current supply, eliminating any risk of electric leakage and meeting international safety standards;
6. The outer surface temperature of the cylindrical high-temperature furnace is low. Imported thermal insulation material ensures the furnace surface temperature remains below 90°C (at 1200°C), ensuring safe operation.
7. Equipped with fully digital AC servo drivers and high-precision, high-response-frequency AC servo motors, ensuring fast frequency response and high positioning accuracy;
8. Equipped with manual pressure release adjustment, effectively protecting the machine, especially the load sensor, in case of unexpected power failure.
Technical specifications:
Test force | 300 kN (optional) | ||
Testing Machine Class | 0.5 | ||
Test Force Measurement Range | 1%-100% | ||
Test force resolution | 1/200,000 of the maximum test force (full-scale resolution remains unchanged) | ||
Relative error of test force indication | ±0.5% | ||
Relative variability of test force indication | ±1.5% | ||
Test force resolution | 1/100000 | ||
Upper and lower jaw eccentricity | ≤10% | ||
Speed of the pull rod movement | 0.01-100mm/min | ||
Pull rod travel | 200mm | ||
Manual uninstallation mechanism | The system is equipped with a manual adjustment mechanism, which can be used to unload in case of unexpected power failure, effectively protecting the machine and test samples. | ||
Power supply | AC380V±10%;50Hz | ||
Electric furnace and temperature control system | |||
High-temperature furnace type | Split-type muffle furnace (three-section), electric wire heating | ||
Operating temperature range | 200~1100℃ | 300~1100℃ | |
Length of the constant temperature zone | 200mm | 150mm | |
Furnace dimensions | Φ90mm | ||
External dimensions | Φ350×500mm (can be adjusted according to user requirements) | ||
Heating element (resistance wire) | Use HREΦ5mm heating tubes | Uses a 1mm diameter furnace wire | |
Electric furnace service life | Continuous operating time at ≤1200°C exceeds 30,000 hours. | ||
Electric furnace table temperature (average) | At 1200℃, ≤90℃; at 700℃, ≤50℃ | ||
Electric furnace lifting method | The electric lifting mechanism raises and lowers the electric furnace, and can be manually operated when power is off. | Manual rotation | |
Heating power | 5KW | ||
Temperature Control Instrument Variations | Conductive Temperature Controller (Japan) | ||
Wet-bulb thermocouple | Type K thermocouple | ||
Temperature fluctuations | Test temperature | Temperature fluctuations | Temperature gradient |
200~600℃ | ±2℃ | ±2℃ | |
600~900℃ | ±3℃ | ±3℃ | |
900~1200℃ | ±4℃ | ±4℃ | |
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