论文部分内容阅读
例题有一铁铸件,在铸造它时所用木模质量是10 kg,木模的密度是0.5×10kg/m3,如果铁铸件的质量是150 kg,试判断铁铸件有无气孔(ρ铁=7.9×103kg/m3).
The example has a cast iron. When it is cast, the mass of the wood mold is 10 kg. The density of the wood mold is 0.5×10 kg/m3. If the mass of the iron casting is 150 kg, try to determine whether the iron casting has pores (ρ = 7.9 × 103kg/m3).