TC4 titanium alloy casting double-blade impeller was successfully developed

As modern industry develops, the performance requirements for materials are becoming increasingly demanding, especially in cutting-edge fields such as aerospace and energy power. These fields require equipment that is lightweight, strong, corrosion-resistant, and stable at high temperatures. TC4 titanium alloy, with its unique physical and chemical properties, is the ideal solution to these problems. However, using titanium alloys to cast double-layer blade impellers is very challenging. Titanium alloys are susceptible to shrinkage, thermal cracking, and compositional segregation during casting, and the complex structure of double-layer blades worsens these issues.

Recently, a customer commissioned NBSM to develop a batch of TC4 titanium alloy castings for double-layer blade impellers made of high-strength TC4 alloy. The impellers have a maximum rotating diameter of 427 mm, an outer wall thickness of 9 mm, and a blade thickness of 3 mm. Through several rounds of technical seminars and process tests, the NBSM technical team gradually discovered the key technology for casting titanium alloy double-layer blade impellers. They effectively reduced the impurity content in the titanium alloy by optimizing the melting process, thereby improving the purity and casting performance of the material. At the same time, they adopted an advanced pouring system and solidification control technology to ensure the smooth flow of the titanium alloy melt and precise solidification. This effectively avoided shrinkage holes, thermal cracks, compositional segregation, and other problems, ensuring the performance and stability of the internal double-layer blades of the impeller.

The successful development of titanium alloy double-layer blade impeller castings is only the beginning of this scientific and innovative journey. As science and technology continue to progress