The wear of industrial elbows has always been a factor affecting safe and civilized production. With the continuous development of science and technology, materials have also been innovated, and materials such as cast stone, cast steel, alloys, and centrifugal cast composite ceramics have appeared one after another. Among them, the pipeline lining alumina ceramics has become one of the most widely used wear-resistant materials due to its high wear resistance, high hardness, oxidation resistance, good corrosion resistance and extremely high resistance to high and low temperature strength. About 80% of the market share (wear-resistant materials).