High temperature resistant materials of high niobium alloy are generally used to make turbine blades of jet engines. In the working process, the modern jet engine turbine blades usually bear the high temperature of 1600-1800 degrees Celsius, while also bear the wind speed of about 300 meters per second, and the resulting huge air pressure, the working environment is very bad. Modern turbine blades are usually made of single-crystal materials with directional solidification. They also have to open air cooling channels inside. The process is extremely complex and is regarded as the pearl in the crown of modern industry. The new high temperature and high performance niobium titanium alloy can further improve the high temperature resistance of turbine blades, so as to increase the inlet temperature of the engine and increase the thrust of the engine. High temperature and high performance high titanium niobium alloy density is about half the nickel-based superalloy, use it to make the engine can greatly reduce engine weight, high temperature parts of engine can be improved in esteem. Engine thrust ratio is the ratio of engine thrust and net weight of engine. It is one of the main indicators to evaluate modern jet engines. It has a decisive effect on aircraft performance.
The development of high temperature and high energy high titanium niobium alloy in China is already the authors, and have begun to industrialized production, high temperature resistant capacity of 2200 +, will bring revolutionary breakthrough in the field of the engine in the future, wait and see.
The preparation technology of high niobium titanium alloy was studied and added W (0. Effect of 2 atomic fraction, %) on microstructure and mechanical properties of high niobium alloy. The experimental results show that W alloying can change the cast structure of high niobium alloy, but it can not change the influence of heat processing tissue and four typical tissues and temperature on its mechanical properties. W alloying can improve high niobium TiAl alloy at room temperature and high temperature strength, lower intensity with the temperature drop rate and improve the brittle ductile transition temperature, but not influence on room temperature plasticity, is advantageous to the FAM group used at higher temperatures.
