高铅青铜铜套水冷金属型生产研究

Study on the Production of High-lead Bronze Copper Sleeve with Water-cooled Metal Mold

在高铅青铜铜套的试制过程中,分别采用了普通砂型,离心浇铸和金属型铸造,生产的铸件均无法满足国外客户的要求。砂型铸造和离心铸造生产的铜套,成分偏析严重。普通金属型生产的铜套,也存在一定的局限。对于壁厚相对较厚大的铸件,普通金属型对于防止偏析的作用有限。介绍了一种水冷金属型生产高铅青铜铜套的铸造方法,通过在金属模外增设水冷系统以提高冷却速度,进而降低高铅青铜中的成分偏析,制备了优质铸件。

Traditional sand mold,centrifugal casting and metal mold casting were used in the trial production of high-lead bronze copper sleeve,and the castings could not meet the requirements of foreign customers.The copper sleeve produced by sand mold casting and centrifugal casting has serious component segregation.The copper sleeves were produced by common metal mold,there were some limitations.For castings with relatively thick wall thickness,the effect of common metal mold on preventing segregation was limited.A casting method for producing high-lead bronze sleeve by water-cooled metal mould is introduced.High quality castings are prepared by adding a water-cooling system outside the metal mold to improve the cooling rate and thereby reduce the composition segregation in the high lead bronze and producing high-quality casting.