Professor Jinchuan Jie from Dalian University of Technology: Cu-Pb-Sn immiscible solidification structure formation and heavy-duty bearing preparation research

The formation of Cu-Pb-Sn immiscible solidification structure and the preparation of heavy-duty bearings are important areas of research on the solidification process of Cu-Pb-Sn alloys and the properties of heavy-duty bearing materials. Cu-Pb-Sn alloy has good wear resistance and high load carrying capacity, and has been widely used in bearing parts of heavy-duty mechanical equipment. Exploring the solidification structure formation of Cu-Pb-Sn alloy and the preparation method of heavy-duty bearing material is of great significance for improving material performance and prolonging service life.

In terms of the solidification structure formation of Cu-Pb-Sn alloys, researchers pay attention to the limitation of the solubility of lead and tin in immiscible systems, as well as the formation and evolution of non-equilibrium phases. Experimental and simulation methods are used to study the phase transformation and phase interface behavior during the solidification of Cu-Pb-Sn alloys. Refractory phases such as Pb5Sn3 and PbSn2 often appear in the alloy, and their formation has a significant impact on the microstructure and mechanical properties of the alloy.

In terms of the preparation method of heavy-duty bearing materials, researchers are committed to developing a preparation process suitable for Cu-Pb-Sn alloys. Commonly used methods include fusion casting, powder metallurgy, electrodeposition and surface alloying. These methods can control the composition, grain size and phase interface characteristics of the alloy, so as to realize the optimization of the performance of the bearing material. At the same time, optimizing the casting process parameters is also the key to the preparation of Cu-Pb-Sn alloy bearings, such as the control of pouring temperature and cooling rate, which has an important impact on the microstructure and properties of the alloy.

The researchers also focused on performance evaluation of heavy-duty bearing materials. The testing and evaluation of wear resistance, compression performance, load carrying capacity and other indicators are of great significance for understanding the performance and application of Cu-Pb-Sn alloy bearing bushes. Methods such as hardness testing, wear testing, and mechanical property testing are widely used to evaluate the performance of alloys under heavy load conditions.

In conclusion, the formation of Cu-Pb-Sn immiscible solidification structure and the preparation of heavy-duty bearings are the hotspots of current research. Through experiments, simulations, and optimization of the preparation process, researchers are trying to achieve the optimal performance of Cu-Pb-Sn alloys and the preparation of heavy-duty bearing materials. However, further in-depth research is still needed, especially the understanding of the solidification behavior and microstructure characteristics of Cu-Pb-Sn alloys, as well as the optimization of the preparation process and performance evaluation.