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磷锡青铜10-1蜗轮箍铸件质量要求甚高,曾采用湿型、干型、型中加冷铁、金属型以及金属型离心铸造等方法生产,均未能解决皮下针孔缺陷.产生这种缺陷的主要原因,由于磷锡青铜10-1在凝固过程中液相线至固相线的间隔很大,流动性差,偏析倾向严重,凝固时产生树枝状结晶,并形成分散缩孔(缩松).为了要获得组织致密的铸件,除加快冷却速度或加入少量锌以缩小液相与固相的间隔范围之外,最有效的办法是采用压力下结晶的铸造方式.我厂本着自力更生
Phosphor bronze 10-1 Worm Hoop casting quality requirements are high, had used wet, dry type, with Canadian iron, metal and metal centrifugal casting and other methods of production, failed to solve the subcutaneous pinhole defects. The main reason for the defects is that because of the large liquid phase to solid phase spacing during the solidification process, the phosphorus-tin bronze 10-1 has poor flowability, serious segregation tendency, dendrite formation during solidification and formation of shrinkage shrinkage Loose.) In order to obtain dense castings, the most effective method is to use a crystal casting method under pressure, in addition to speeding up the cooling rate or adding a small amount of zinc to narrow the liquid to solid phase spacing.