Babbitt alloy (including tin base bearing alloy and lead base bearing alloy is the most well-known bearing material, with antifriction properties of tin and lead base bearing alloy. Invented by American Babbitt and named for its white color, also known as white alloy, its application can be traced back to the industrial Revolution. Tin base babbitt and lead base babbitt with antifriction properties are the most suitable materials for low axis rotation, compared with other bearing materials, with better adaptability and compression, widely used in large Marine diesel engines, turbines, alternators, and other mining machinery and large rotating machinery. The main alloy components are tin, lead, antimony, copper. Antimony and copper are used to improve the strength and hardness of alloys. The organization characteristic of babbitt is, in the soft phase matrix uniformly distributed on the hard phase particle, soft phase matrix make alloy has the very good embedded hidden sex, compliance and resistance to bite, and after running-in, soft base concave, hard point outward, make form tiny space between the sliding surface, a storage space and channel the lubricating oil, good anti-friction; The convex hard point plays a supporting role and is conducive to bearing. Babbitt alloy in addition to the manufacture of sliding bearings, because of its soft texture, low strength, often its wire or powder sprayed on steel and other substrates into bearing used. Babbitt alloy can be divided into tin base (see tin alloy) and lead base alloy. The latter contains 10% ~ 20% antimony and 5% ~ 15% tin. In order to prevent component segregation and refine grain, a small amount of arsenic is often added. Lead - based alloys have lower strength and hardness than tin - based alloys and poor corrosion resistance. The microstructure characteristics are that hard phase particles are evenly distributed on the soft phase matrix. The soft phase matrix makes babbitt alloy have very good embedding, compliance and anti-bite properties. After running in, the soft matrix is concave and the hard point is convex, forming a tiny gap between the sliding surfaces and becoming an oil storage space and lubricating oil channel, which is conducive to reducing friction. The convex hard point plays a supporting role and is conducive to bearing.