铜轴承的主要条件是耐磨,一般说来以含铜80%、含锡10%、含铅10%的铅青铜耐磨性是佳,但铅青铜的浇铸特别困难,如熔化与造型控制不当,很易产生孔眼与裂口等缺陷,我们在工作中会碰见这些情况。 孔眼产生的主要原因不外乎,①,由於砂模太湿,放出大量气体包在条件里,形成气孔,②,铜水 The main condition of copper bearing is wear-resisting. In general, wear resistance of lead bronze containing 80% of copper, 10% of tin and 10% of lead is good, but casting of lead bronze is particularly difficult, such as improper melting and shape control , It is easy to produce defects such as holes and rips, we will meet in the work of these situations. The main reason for the hole is nothing more than, ①, because the sand mold is too wet, release a lot of gas in the package conditions, the formation of pores, ②, copper