Bus alloy for compressor support bearings

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Babbitt metal Babbitt metal Tin-based and lead-based bearing alloy with antifriction properties. Named after its invention by American Babbitt. Because of its white color, it is also called white alloy. The main alloy components are tin, lead, antimony and copper. Antimony and copper are used to improve the strength and hardness of the alloy. The structural characteristics of Babbitt alloy are that hard phase particles are evenly distributed on the soft phase matrix. The soft phase matrix makes the alloy have very good embedding, compliance and anti-seizure properties. After running in, the soft matrix is ​​concave and the hard points are convex, forming a small gap between the sliding surfaces, which becomes an oil storage space and lubricating oil channel, which is beneficial to friction reduction. ； The convex hard points play a supporting role and are conducive to load-bearing. In addition to manufacturing sliding bearings, Babbitt alloy is often sprayed with silk or powder on steel and other substrates to make bearing bushes due to its soft texture and low strength. Babbitt alloys are divided into two types: tin-based (see tin alloy) and lead-based alloys. The latter contains 10% to 20% of antimony and 5% to 15% of tin. In order to prevent component segregation and refine the grains, a small amount of arsenic is often added. Lead-based alloys are lower in strength and hardness than tin-based alloys and have poorer corrosion resistance. 　　Babbitt alloy (including tin-based bearing alloy and lead-based bearing alloy) is the most well-known bearing material. It was named after the invention by American Babbitt. Because of its white color, it is also called white alloy. Its application can be traced back to the era of the Industrial Revolution. Tin-based Babbitt alloy and lead-based Babbitt alloy with anti-friction properties are the only materials suitable for rotation relative to low-hardness shafts. Compared with other bearing materials, they have better adaptability and press-fitness. They are widely used in large marine diesel engines, turbines, alternators, and other mining machinery and large rotating machinery. 　　The main components of babbitt alloy are tin, lead, antimony and copper. Among them, antimony and copper are used to improve the strength and hardness of the alloy. Babbitt alloys can be simply divided into three types: High-tin alloys, high-lead alloys and intermediate alloys (both tin and lead account for important proportions in the alloys). In all these alloy systems, antimony and copper serve as important alloying and hardening elements, and their structures are composed of hard, intermetallic compounds dispersed in a soft matrix.