TA18钛合金板材耐高温多少度?

Core Viewpoint - TA18 titanium alloy plates exhibit excellent high-temperature performance, making them suitable for various applications in aerospace, chemical equipment, and marine engineering [1][6]. High-Temperature Performance - TA18 titanium alloy maintains good mechanical properties within a design temperature range of -250°C to 450°C, particularly between 300°C and 450°C, where yield strength and tensile strength meet most structural application requirements [3][4]. - The maximum recommended usage temperature for TA18 is around 450°C, with international titanium prices exceeding $30,000 per ton, reflecting its market significance [4][5]. Oxidation Resistance - TA18's advantage in high-temperature environments lies in its slow oxidation layer formation rate at around 650°C, which is crucial for its high-temperature oxidation resistance [4][5]. Common Misconceptions - A prevalent misconception is focusing solely on corrosion resistance while neglecting high-temperature performance, as some titanium alloys may experience significant mechanical property degradation at elevated temperatures [4]. - Another misconception involves prioritizing cost over the alloy's processing intricacies, as improper manufacturing processes can lead to defects that affect overall performance [4]. - Misjudging environmental conditions, such as the impact of oxidizing atmospheres on high-temperature oxidation, can also shorten the material's lifespan [4]. Technical Controversies - There are differing opinions within the industry regarding TA18's high-temperature limits, with some suggesting it can operate stably above 450°C under specific conditions, while others caution against increased oxidation rates and structural damage risks beyond this temperature [5]. - Current market data indicates stable pricing for titanium alloys domestically, while international prices reflect tight supply and high demand, underscoring the material's continued appeal due to its unique performance advantages [5]. Conclusion - Overall, TA18 titanium alloy plates demonstrate stable high-temperature performance under reasonable conditions (≤450°C), playing a critical role in applications such as aircraft structures and chemical heat exchangers [5][6].