Chang Qingming,Ye Rongmao,An Geying,Wan Huiguang(Harbin Institute of Technology
Issue 5, (1994)
摘要:By maens of or thogonal experiments, the flowability of Al-Li alloy in graphit moldunder vaccum condition is measured, the principal influencing factors are obtained.Based on Benulli equation and energy equation,the vilocity,temperature field and the flowing lenth of Al-Lialloy filling in bar-shape are simulated with computer. Using Volume of Fluid(VOF)method,combining the fluid flow and heat transfer, the computor simulates not only the two dementionalvelocity field and temeprature field, but also the flowing stoping process,providing the theory ofpredicting and preventing defacts such as shot run, cold shut and so on.
关键词:Coupling computing;Orthogonal experiment;Volume of fluid.
摘要:The porous ceramic shell mould was made of foaming slurry by adding foaming agents and foam stabilizer. It can be reduce remaind strength and improve collapsibility but withsufficient green and high temperature strength and casting surface quality.The distuibution of airbubble, density, viscosity,yield value,desposite weight of slurry and green strength, high temperature strength,remaind strength and rate of collabsibility of porous ceramic shell mould were alsodiscussed in this paper.
摘要:This acticle explored some important problems during the quality control for the production of the iron and steel castings produced by EPC-V Provess,and introduced some experiences during application in the factory.
摘要:A agent has been produced for spheroidization of iron compounds in Al--alloys.Byaddition of the agent into ferriferous Al-alloys(1.0%-4.0%Fe),the needle-form iron compoundscan be transformed into a spheroid or granule shape and mechanical properties of these alloys canbe enhanced greatly,UTS and elongation can increace by 20%-90% and 40%-100% respective ly.Productive experiments show: the spheroidization effect is remarkable and permament.It canbe spreaded conveniently in the practical production of Al-alloys.
摘要:The high temperature properties of phosphate no-bake moldcoatings has been testedby the appratus for high temperature testing of resinbondedsands.The results show that the coatings have high transvers strengh, good thermal stability against cracking in elevated temperature.
关键词:No-bake moldcoatings;Phosphate;High temperature properties