摘要:In this paper, we have studied the distributive characteristic of cast and annealing structure of centrifugal ductule iron pipes casted in water cooled metallic mould, and distributions of various elements along pipe wall and in various phases have been analyzed with the help of EMPA
摘要:The formation of net structure in the alloy ZA27 has been investigated by means of analyzing microstructure with different cooling rate of solidification and homogenizing treatment. The results show that the net structure is ternary eutectics forming under the condition of un-equilibrium crystallization, and that it would not be eliminated by controlling cooling rate of solidification, but it could do by homogenizing treatment.
摘要:In this paper, the effects of the grain distribution, density, slurry viscosity, weight of coated plate and other technological factors to the surface quality of mould shell have been described. The optimum flour grain distribution and technical parameters applied in mechanized production line can be selected. Much better surface quality of investment casting is also available when adopting sodium silicate-silica flour slurry,
摘要:This paper deals with a refining flux of eliminating aluminum, the harmful element and reducing the porosity in bronze. The kind of flux has an effective ability to refine the melt, reduce the tendency of the defect of horn blowhole in centrifugal castings and characteristics of easy serviceability and no pollution.
摘要:The idea of all-round optimization of modification has been put forth in order to make the modification apllied in Al-alloys more scientific,proper,and effective.