【摘要】 采用覆膜树脂砂壳型、铁液从一端进入型腔的侧浇工艺,生产一种半激冷4100型Cr-Ni-Mo灰铸铁凸轮轴。讨论了铁液白口宽度、w(C)量、浇注温度对收缩缺陷的影响,将铁液w(C)量控制在3.65%~3.7%,CE控制在4.25%~4.38%,适当降低铁液浇注前的白口宽度,以及控制浇注温度在1 400~1 420℃,可以避免4100凸轮轴产生收缩缺陷。更多还原

【Abstract】 A sort of semi-chilled Cr-Ni-Mo-alloyed gray cast iron camshaft was produced by adopting resin-coated sand vertically parted shell mold and the casting method that the iron melt enters the mold cavity from one end of the casting.The influence of the chilling width of the iron melt,w(C),pouring temperature on the shrinkage defects formation was discussed.It is possible to prevent the shrinkage defects of the camshaft by keeping the w(C) in the range of 3.65%~3.7%,keeping CE in the range of 4.25%~4.38%,reducing appropriately the chilling width of the iron melt before pouring and,as well as,keeping the pouring temperature in the range of 1 400~1 420 ℃.更多还原