In order to reduce friction and wear, split bearing blocks have various requirements for bearing material. In addition to small friction coefficient of friction pairs, the following points should also be met. Compressive strength, fatigue strength, and impact resistance should be sufficient. The alloy thickness of the bearing seat is (0.013-0.13) mm. Good adhesion resistance. When the load is large, the speed is high, the bearing seat clearance is small, the surface finish is low, and the lubrication is poor, attention should be paid to the matching of materials to prevent adhesion and wear of the friction pair. Adaptability and ability to accommodate foreign objects. Materials with low hardness, good plasticity, and low elastic coefficient have good adaptability and can accommodate foreign matters. Good corrosion resistance, low price, and sufficient sources. After oxidation, the colloidal deposits have a corrosive effect on the bearing material. The commonly used materials for bearing shells and seats are divided into two categories: metallic materials and non-metallic materials. Common gray cast iron, wear-resistant cast iron, and ductile iron are suitable for low speed light loads or open drive bearing seats. The mechanism is that the sheet or spherical graphite component in the material forms a lubricating graphite layer on the cover surface. ZChSnSb10-6 has good corrosion resistance, strong adhesion resistance, and a strong bond with the steel back. It is expensive. It is suitable for high-speed and heavy loads, such as locomotive and vehicle ZChPbSb16-16-2, which has poor adhesion resistance, thermal expansion, and is brittle and suitable for medium speed and medium load. This babbitt alloy has good wear resistance, glue resistance, and thermal conductivity, and is suitable for bearing material. ZCuPb30 uses a pair of metals that are cast or sintered and attached to the inner surface of the steel back bearing pad, providing excellent adhesive resistance. ZCuSn10-l has good friction reduction and wear resistance. Good bearing material and high speed and heavy load have higher hardness and strength than babbitt alloy, with corrosion resistance, but poor runnability. The matching journal requires higher hardness and finish, suitable for medium speed and heavy load. Low tin aluminum alloy, containing Sn0.5 and high tin aluminum alloy, containing Sn20%. Materials such as locomotive diesel have high strength, corrosion resistance, and good thermal conductivity. Iron powder+graphite powder or copper powder+graphite powder → press forming → sintering to form a pore structure, with pores accounting for 15 to 35% → soaking and boiling → oil bearing pedestal. Due to poor toughness, this bearing bush is only suitable for smooth loads and small and medium speeds with poor lubrication conditions.