ZCuPb10Sn10 lead bronze alloy material

ZCuPb10Sn10 lead bronze
Main ingredients:
Tin Sn: 9.0-11.0
Zinc Zn:~
Lead Pb: 8.0-11.0
Phosphorus P:~
Nickel Ni:~
Aluminum Al:
Iron Fe:
Manganese Mn:
硅 Si：～
Copper Cu: Surplus
Antimony Sb:~
Be Be:~
Magnesium Mg:~

The disadvantage of ZCuPb10Sn10 lead bronze is that the melting point difference between copper and lead is large, and they are not miscible, resulting in poor casting performance and easy occurrence of reverse segregation, which increases the lead content on the surface of the casting; At the same time, the particles of lead are coarse and unevenly distributed, which cannot achieve the expected anti-wear effect. Currently, many bearing copper sleeves used in power machinery mostly use tin containing 6% tin, which is a scarce resource and expensive; Moreover, when using tin bronze ZQSn6-6-3 as the bearing copper sleeve material, its wear resistance is poor, its service life is short, and its usage is not ideal. According to the data; After adding trace rare earth elements to the cast lead bronze zQPb25, the reverse segregation of the casting can be improved, the lead particles can be refined, and their distribution can be made uniform, thereby enhancing the wear resistance. After adding different types of trace rare earths to zQPb25, the experimenters also obtained the same experimental results. Among them, the effect of adding mixed light rare earths was better. Based on the experiment, several bearing copper sleeves with 0.3% mixed light rare earths added to lead bronze (ZQPb25) were further applied in production. After trial production, they replaced the tin bronze ZQSn6-6-3 bearing copper sleeves (main shaft copper sleeve and clamp blue copper sleeve) on several tugboat diesel engines. After more than a year of actual operation.